A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics
Phase: PHASE2
Conditions: Rheumatoid Arthritis
Sponsor: Eisai Co., Ltd.

Eisai. Co., Ltd. 
E6011-J081-202 
Date: 24 Apr 2017 version 4.0 
Confidential  
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1 
TITLE PAGE 
Clinical Study Protocol 
Study Protocol 
Number: 
E6011-J081-202 
Study Protocol 
Title: 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis 
Inadequately Responding to Biologics 
Sponsor: 
Eisai Co., Ltd. 
4-6-10 Koishikawa, Bunkyo-Ku, Tokyo 112-8088, Japan
Investigational 
Product Name: 
E6011
Indication: 
Rheumatoid arthritis (RA) patients inadequately responding to 
biologics 
Phase: 
2 
Approval Date: 
V1.0 
31 Aug 2016 
V2.0 
13 Oct 2016 
V3.0 
23 Feb 2017 
V4.0 
24 Apr 2017 
V5.0 
31 Aug 2018 
V6.0 
31 Mar 2019 
GCP Statement: 
This study is to be performed in full compliance with Good Clinical 
Practice (GCP) and regulations.  All required study documentation 
will be archived as required by regulatory authorities. 
Confidentiality 
Statement: 
This document is confidential.  It contains proprietary information 
of Eisai (the sponsor).  Any viewing or disclosure of such 
information that is not authorized in writing by the sponsor is 
strictly prohibited.  Such information may be used solely for the 
purpose of reviewing or performing this study. 

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2 
CLINICAL PROTOCOL SYNOPSIS 
Compound No.:  E6011 
Name of Active Ingredient:  To be determined 
Study Protocol Title 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to 
Biologics 
Study Regions (Countries) or Sites 
Japan 
Study Period and Phase of Development 
October 2016 to February 2020 (planned) 
Phase 2 
Objectives 
To conduct the following assessments on repeated subcutaneous administrations of E6011 in 
rheumatoid arthritis (RA) patients inadequately responding to biologics: 
<Primary objectives> 
• 
To evaluate the efficacy of E6011 by comparing ACR20 response rate at Week 12 with 
placebo as the primary endpoint 
• 
To evaluate the safety and tolerability of E6011 
<Secondary objective> 
• 
To evaluate the pharmacokinetics (PK) and immunogenicity of E6011 
<Exploratory objective> 
• 
To explore the PK/pharmacodynamics (PD) and biomarkers of E6011 
Study Design 
This study is a multicenter, randomized, double-blind, placebo-controlled, parallel-group comparison 
study.  E6011 and placebo groups are set for the study.  Subjects will receive E6011 400 mg or 
placebo at Weeks 0, 1, 2, and every 2 weeks until Week 10 and then E6011 200 mg or 400 mg every 
2 weeks between Weeks 12 and 22. 
The study consists of Screening, Observation, Treatment, Extension, and Follow-up Phases. 
After undergoing screening assessments within 42 days prior to the study treatment, subjects with the 
certain eligibility confirmed in the Observation Phase will be allocated to E6011 or placebo group at 
a 1:1 ratio through dynamic allocation using the following factors: number of biologics with 
inadequate response, C-reactive protein (CRP) level at the Screening Phase.  Subjects who will 
continue the study beyond Week 12 will be further allocated to E6011 200 mg or 400 mg at a 1:1 
ratio in the initially assigned group (E6011 or placebo group) through dynamic allocation using the 
same factors as above.  
In the Treatment Phase (24 weeks), subjects will receive either E6011 400 mg or placebo at Weeks 0, 
1, 2, and every 2 weeks subsequently until Week 10 and then E6011 200 mg or 400 mg every 
2 weeks between Weeks 12 and 22 in a double-blind manner.  Subjects who complete evaluations at 

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Week 24 of the Treatment Phase will enter the Extension Phase.  The Extension Phase is up to 104 
weeks after the start of the study treatment, and subjects will receive an open-label E6011 200 mg 
every 2 weeks until Week 102.  If the investigator or subinvestigator judges that the response to 
treatment is insufficient in the Extension Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed (reduction of the dose back to 200 mg after an increase to 400 mg will also be 
allowed). 
If subjects complete or discontinue the study, a follow-up visit should be conducted 28 days after the 
completion or discontinuation of the study, and a follow-up visit or telephone interview should be 
conducted 70 days after the last dosing.  
An overview of the study design is presented below. 
Observation 
Phase 
Primary endpoint 
 
 
Screening 
Phase 
Treatment Phase 
(Double-blind) 
Extension Phase 
(Open label) 
Days –42 to –1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Week 0 1 
2 
4 
6 
8 
10 12 14 16 18 20 22 24 26 28 30 32 
……… 
104 
*: If the investigator or subinvestigator judges that response to treatment is insufficient during 
the Extension Phase, administration of E6011 400 mg every 2 weeks will also be allowed. 
In addition, if subjects complete or discontinue the study, a follow-up visit should be conducted 
28 days after the completion or discontinuation of the study, and a follow-up visit or telephone 
interview should be conducted 70 days after the last dosing. 
 
Number of Subjects 
A total of 60 subjects (30 for the E6011 group and 30 for the placebo group) 

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Inclusion Criteria 
Subjects must meet all of the following criteria to participate in this study: 
1. Aged ≥18 and <75 years old at the time of written informed consent 
2. RA patients who meet the 1987 ACR criteria or 2010 ACR/EULAR criteria ≥12 weeks before 
informed consent 
3. Received biologics treatment under approved dosage and administration for ≥12 weeks before 
screening but discontinued it because of inadequate response 
4. The history of biologics treatment Note discontinued due to inadequate response should be limited 
to 2 agents among adalimumab, infliximab, golimumab, certolizumab pegol, etanercept, 
tocilizumab, and abatacept (including biosimilars). 
(Note: This includes those treated in clinical studies) 
5. Presented ≥6 tender joints (out of 68 joints) and ≥6 swollen joints (out of 66 joints) in the 
Screening and Observation Phases 
6. Able to continue a stable dose regimen of MTX at 6 to 16 mg/week from 4 weeks before starting 
the study treatment until completion of the Extension Phase (or until study discontinuation) 
7. CRP level ≥0.6 mg/dL or erythrocyte sedimentation rate (ESR) ≥28 mm/hr in the Screening 
Phase 
8. Weighs ≥30 kg and ≤100 kg in the Screening Phase 
9. Has voluntarily consented, in writing, to participate in this study.  If a subject is below the age of 
20, written consent should be obtained from a legally acceptable representative. 
10. Has been thoroughly briefed on the requirements of the study, can understand, and is willing and 
able to comply with all aspects of the protocol 
Exclusion Criteria 
Subjects who meet any of the following criteria will be excluded from this study: 
1. Any history or complication of inflammatory arthritic disorder Note other than RA and Sjogren’s 
syndrome 
(Note: Such as arthritis associated with virus infection, systemic lupus erythematosus, mixed 
connective tissue disease, dermatomyositis/polymyositis, scleroderma, rheumatic polymyalgia, 
psoriatic arthritis, and arthritis occurring in patients under 16 years of age) 
2. Class IV in the Criteria for Functional Status in RA (the ACR 1991 Revised Criteria) in the 
Screening Phase 
3. Received biologics for RA during the following periods: 
• 
Adalimumab:  
within 6 weeks before starting the study treatment 
• 
Infliximab:  
within 6 weeks before starting the study treatment  
 
(within 8 weeks for subjects who received a dose of 10 mg/kg) 
• 
Golimumab:  
within 6 weeks before starting the study treatment 
• 
Certolizumab pegol:  within 6 weeks before starting the study treatment 
• 
Etanercept:  
within 2 weeks before starting the study treatment 
• 
Tocilizumab:  
within 6 weeks before starting the study treatment 
• 
Abatacept:  
within 6 weeks before starting the study treatment 
4. Received disease-modifying antirheumatic drugs (DMARDs) other than MTX within 4 weeks 
before staring the study treatment 
5. Received leflunomide or tofacitinib within 12 weeks before starting the study treatment 

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6. Received corticosteroids equivalent to >10 mg/day of prednisolone within 4 weeks before 
starting the study treatment 
7. Received corticosteroids (intraarticular, intramuscular, or intravenous), intraarticular injection of 
sodium hyaluronate (including sodium hyaluronate crosslinked polymer and sodium hyaluronate 
crosslinked polymer crosslinked with vinylsulfone), intraarticular injection of local anesthesia 
agent, or an analgesic other than NSAIDs (oral, suppository, and topical) within 4 weeks before 
starting the study treatment 
8. Treatment with MTX, folic acid, corticosteroids (equivalent to ≤10 mg/day of prednisolone, 
taken orally or by suppository), or herbal medicine indicated for RA was started or dose regimen 
was modified within 4 weeks before starting the study treatment (however, if MTX dose was 
increased or decreased beyond 4 mg at one time, MTX should be used at a stable regimen for 
8 weeks before starting the study treatment). 
9. Underwent arthrocentesis/drainage within 4 weeks before starting the study treatment or 
cytapheresis therapy within 8 weeks before starting the study treatment 
10. Underwent surgical operation on the joint (including synovectomy and repair of tendon rupture) 
which is evaluated in this study within 8 weeks before informed consent 
11. Received cyclophosphamide, cyclosporine (except for eye drop solution), or azathioprine within 
52 weeks before starting the study treatment 
12. Received immunoglobulin preparations or blood products within 24 weeks before starting the 
study treatment 
13. Received a live vaccine within 12 weeks before starting the study treatment, or is planning to 
receive one 
14. Any current clinically significant disease (e.g., cardiac, respiratory, gastrointestinal, or renal 
disease) that could affect the subject’s safety or interfere with the conduct of study in the opinion 
of the investigator or subinvestigator 
15. Any current uncontrolled disorders such as acute cardiac infarction, unstable angina, brain 
infarct, or symptomatic intracerebral hemorrhage 
16. Severe or uncontrolled diabetes 
17. History of severe allergy (shock or anaphylactoid symptoms) 
18. History or current clinical condition of malignant tumor, lymphoma, leukemia, or 
lymphoproliferative disease, except for skin carcinoma (epithelial carcinoma or basal cell 
carcinoma) and cervix carcinoma which have been completely excised and without metastasis or 
recurrence for more than 5 years before informed consent 
19. Immunodeficiency or history of human immunodeficiency virus (HIV) infection 
20. Infection requiring hospitalization or intravenous administration of antibiotics within 4 weeks 
before starting the study treatment or disease requiring administration of antivirus drugs (e.g., 
herpes zoster) within 4 weeks before starting the study treatment  
21. History of tuberculosis or current active tuberculosis 
22. History of clinically important vasculitis 
23. Tested positive for any of the following in the Screening Phase: HIV, hepatitis B virus surface 
antigen (HBs antigen), hepatitis B virus surface antibody (HBs antibody), hepatitis B virus core 
antibody (HBc antibody), hepatitis B virus DNA (HBV DNA), hepatitis C virus antibody (HCV 
antibody), human T-lymphotrophic virus type I antibody (HTLV-1 antibody), or syphilis (except 
if positive for the HBs antibody only, and it is clear that this is due to hepatitis B vaccination. In 
case of positive RPR and negative TP antibody results in the syphilis tests, the positive result is 
not considered valid if a false positivity is confirmed by repeated TP antibody negative results of 

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other syphilis tests performed 21 days or more later).  For subjects who are negative for both 
HBs antigen and HBV-DNA quantitative test and positive for either or both of anti-HBc 
antibody and anti-HBs antibody, their study participation is allowed if the investigator or 
subinvestigator takes a proper measure such as HBV-DNA monitoring based on the “Guideline 
for measures against hepatitis B caused by immunosuppression and chemotherapy.” 
24. Positive in tuberculosis test (QuantiFERON®TB Gold Test or T-SPOT®.TB Test) in the 
Screening Phase.  For those whose results are “hold” (indeterminable) in repeated tests, their 
study participation is only allowed if they start receiving a prophylactic treatment with isoniazid 
(in principle, 300 mg/day [5 mg/kg/day in case of low weight] for approximately 9 months) 
≥21 days before starting the study treatment. 
25. Findings indicating a history of tuberculosis on chest x-ray in the Screening Phase 
26. Neurological findings such as motor paralysis, visual impairment, or language disorder in the 
Screening Phase 
27. Blood CD4-positive cell count <200/μL or white blood cell count <3,000/μL in the Screening 
Phase 
28. Any of the following laboratory abnormalities in the Screening Phase 
• 
Hemoglobin: 
<8.0 g/dL 
• 
Neutrophil count: 
<1,500/μL  
• 
Platelet: 
<100,000/μL 
• 
AST or ALT: 
>3×the upper limit of normal (ULN) 
• 
Serum creatinine: 
>1.5 mg/dL 
• 
Serum KL-6: 
>ULN 
• 
β-D glucan: 
>ULN 
29. Demonstrated prolonged QTcF interval (>450 ms) in repeated ECG examinations 
30. Women of childbearing potential who have a positive pregnancy test in the Screening or 
Observation Phase or of breastfeeding 
31. Women of childbearing potential who: 
• 
Had unprotected sexual intercourse within 30 days before study entry and who do not agree to 
use a highly effective method of contraception (e.g., total abstinence, use of an intrauterine 
device [IUD], a double-barrier method [such as condom plus diaphragm with spermicide], an 
oral contraceptive, or have a vasectomized partner with confirmed azoospermia) throughout 
the entire study period or for 70 days after the last dosing. 
• 
Are currently abstinent, and do not agree to use a double-barrier method (condom plus 
diaphragm with spermicide) during the study period or for 70 days after the last dosing. 
• 
Are using oral contraceptives but are not on a stable dose of the same oral contraceptive 
product for at least 4 weeks before starting the study treatment and who do not agree to use the 
same contraceptive during the study or for 70 days after the last dosing. All women will be 
considered to be of childbearing potential unless they are postmenopausal [amenorrheic for at 
least 12 consecutive months, in the appropriate age group, and without other known or 
suspected cause] or have been sterilized surgically [i.e., either of bilateral tubal ligation, total 
hysterectomy, or bilateral oophorectomy were performed at least 1 month before dosing]). 
32. Men who have not had a successful vasectomy (without confirmed azoospermia) and their 
female partners do not meet any of the criteria above (but, study entry is allowed if the female 
partner is not of childbearing potential or practicing highly effective contraception throughout 
the study period or for 70 days after the last dosing).  No sperm donation is allowed during the 
study period or for 70 days after the last dosing. 

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33. Scheduled for surgery during the study 
34. Currently enrolled in another clinical study or used any investigational drug or device within 
28 days (or 5× the half-life, whichever is longer) before informed consent 
35. Has been treated with E6011 or any unapproved biologics for RA within 12 weeks before 
starting the study treatment  
36. Use of a psychotropic agent as recreational purpose other than therapeutic purpose 
37. Any history of a medical condition or a concomitant medical condition that in the opinion of the 
investigator or subinvestigator would compromise the subject’s ability to safely complete the 
study 
Study Treatments 
Treatment Phase: E6011 400 mg or placebo will be subcutaneously administered at Weeks 0, 1, 2 and 
every 2 weeks up to Week 10, and then E6011 200 mg or 400 mg will be subcutaneously 
administered every 2 weeks between Weeks 12 and 22.  
Extension Phase: E6011 200 mg will be subcutaneously administered every 2 weeks until Week 102.  
When subjects insufficiently respond to the treatment, repeated subcutaneous administration (400 mg 
of E6011 every 2 weeks) will be allowed. 
The study drug containing E6011 50 mg, 100 mg, or placebo in 1 vial (1 mL) will be used in the 
study.  In the Treatment Phase, 4 mL will be subcutaneously administered.  In the Extension Phase, 
2 mL will be subcutaneously administered for the E6011 200 mg dosing and 4 mL will be 
subcutaneously administered for the 400 mg dosing.  
In the 2 mL administration, subjects will receive study drug subcutaneously in 2 separate sites, 1 mL 
each, from the following sites: right or left upper arm, right or left abdomen, or right or left thigh.  In 
the 4 mL administration, subjects will receive study drug subcutaneously in 4 separate sites, 1 mL 
each.  However, 4 mL of the study drug may be given subcutaneously in 2 separate sites, 2 mL each, 
only if the investigator or subinvestigator judges that the study drug can be administered properly. 
Duration of Treatment 
Treatment Phase: 
 24 weeks 
Extension Phase: 
 80 weeks 
Concomitant Drug/Therapy 
< Prohibited Concomitant Drugs and Therapies > 
The concomitant use of the following drugs or therapies is prohibited until completion of the 
Extension Phase (or until study discontinuation). 
• 
DMARDs (except MTX)  
• 
Biologics (adalimumab, infliximab, golimumab, certolizumab pegol, etanercept, tocilizumab, 
abatacept, etc.), including biosimilars 
• 
Intraarterial, intramuscular, or intravenous injection of corticosteroids 
• 
Intraarticular injection of sodium hyaluronate (including sodium hyaluronate crosslinked 
polymer and sodium hyaluronate crosslinked polymer crosslinked with vinylsulfone) or local 
anesthetic agent 
• 
Arthrocentesis/drainage 
• 
Cytapheresis 
• 
Any analgesic other than NSAIDs (oral, suppository, or topical) 

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• 
Cyclophosphamide, cyclosporine (with the exception of eye drops), or azathioprine 
• 
Immunoglobulin preparations or blood products 
• 
Live vaccines  
• 
Activated form folic acid, over-the-counter medications containing folic acid as main 
component 
• 
Other investigational drugs or investigational devices  
• 
Surgical operations on arthritic disorder  
< Restricted Concomitant Drugs >  
• 
MTX and folic acid should be continued at a stable dose regimen up to completion of the 
Extension Phase (or until study discontinuation).  However, if an adverse event associated with 
MTX is noted during the Extension Phase, dose reduction or interruption is permitted. If the 
event disappears after dose reduction or interruption, the dose can be increased to the previous 
level. 
• 
Corticosteroids (equivalent to ≤10 mg/day of prednisolone, taken orally or by suppository) and 
herbal medicine indicated for RA are allowed under restricted conditions, but dose regimen of 
concomitant drugs should not to be modified up to Week 24 (or until study discontinuation).  
Between Weeks 24 and Week 104, the regimen should not be modified except for the 
following cases: dose reduction, interruption, dose increase following the dose reduction (up to 
the initial dose level), and restarting administration after discontinuation. 
• 
NSAIDs (oral, suppository, or topical) may be taken concomitantly but are prohibited between 
the night before the day of efficacy assessments and the end of the assessments. 
Assessments 
< Efficacy > 
Number of tender joints, number of swollen joints, visual analog scale (VAS; patient’s pain 
assessment and patient’s disease activity global assessment, and physician’s disease activity global 
assessment), patient’s physical function assessment (HAQ), CRP, and ESR 
< Safety > 
Safety will be assessed based on all adverse events (AEs) observed, regular monitoring of clinical 
laboratory tests (including vasculitis marker tests), vital signs, chest x-rays, standard 12-lead 
electrocardiograms, physical findings, injection site findings, and neurological findings. 
< Pharmacokinetics > 
Serum E6011 concentration 
< Biomarkers > 
Serum total fractalkine (FKN) concentration, Serum rheumatoid factor (RF) concentration, serum 
anticyclic citrullinated peptide (CCP) antibody concentration, serum matrix metalloproteinase 
(MMP)-3 concentration, serum tartrate resistant acid phosphatase (TRACP)-5b concentration, serum 
cytokine concentration (granulocyte macrophage colony-stimulating factor [GM-CSF], interferon-γ 
[IFN-γ], interleukin [IL]-1β, IL-6, TNFα, etc.), serum leucine-rich alpha-2 glycoprotein 1 (LRG1) 
concentration, serum angiopoietin 2 (Ang2) concentration, Vectra™ DA, immunocytes such as blood 
CX3CR1-positive cells 
< Immunogenicity > 
Serum anti-E6011 antibody 
 

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Bioanalytical Methods 
Serum E6011 concentration, serum total FKN concentration, serum RF concentration, serum 
anticyclic citrullinated peptide (anti-CCP) antibody concentration, serum MMP-3 concentration, 
serum TRACP-5b concentration, serum cytokine concentration, serum LRG1 concentration, serum 
Ang2 concentration, Vectra™ DA, and serum anti-E6011 antibody will be determined using 
validated assay methods.  Immunocytes such as blood CX3CR1-positive cells will be analyzed. 
Statistical Methods 
The statistical analyses in Treatment Phase will be performed after the database in the Treatment 
Phase is locked and the treatment is unblinded, and then final statistical analyses will be performed 
by using all data after the database throughout the study period is locked.  
The details will be described separately in the Statistical Analysis Plans. The Statistical Analysis 
Plans for the Treatment Phase and the entire study (the Treatment and Extension Phases) will be 
finalized before each database lock.  
< Primary Endpoint > 
• 
ACR20 response rate at Week 12 
< Secondary Endpoints > 
• 
ACR20, ACR50 and ACR70 response rates at each evaluation time point (excluding ACR20 
response rate at Week12) 
• 
Values and changes from baseline in ACR components (number of tender joints, number of 
swollen joints, VAS [patient’s pain assessment and patient’s disease activity global assessment, 
and physician’s disease activity global assessment], patient’s physical function assessment 
[HAQ], CRP/ESR), DAS28-ESR, DAS28-CRP, simple disease activity index (SDAI), and 
clinical disease activity index (CDAI) at each evaluation time point 
• 
EULAR response classification and disease activity classification based on DAS28-ESR and 
DAS28-CRP at each evaluation time point 
• 
Remission rates calculated based on remission criteria (DAS28-ESR, DAS28-CRP, SDAI, 
CDAI, and Boolean) at each evaluation time point 
< Analysis Sets > 
• 
The Full Analysis Set (FAS) is the group of randomized subjects who received the study drug 
and had at least 1 evaluable postdose primary efficacy data 
• 
The Per Protocol Set (PPS) is the group of subjects who sufficiently complied with the 
protocol.  Details of the PPS criteria will be determined before database lock and treatment 
unblinding and will be specified in the Statistical Analysis Plan 
• 
The Safety Analysis Set is the group of subjects who received the study drug and had at least 1 
evaluable postdose safety data 
< Efficacy Analyses > 
The primary efficacy analysis set is FAS.   
Analyses for the Primary Endpoint 
ACR20 response rate at Week 12 will be analyzed using a logistic regression model with number of 
biologics with inadequate response and CRP level at the Screening Phase as covariates, for the 
comparison between placebo and E6011. Significance level is α=0.025 (one-sided). Subjects with 
missing primary efficacy endpoint due to early discontinuation or other reasons will be considered 
nonresponders. In case that the number of subjects in each category of covariates is very small, 

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integration of the categories will be planned.  ACR20 response rate and its 2-sided 95% confidence 
interval for each treatment group will be calculated. The difference in ACR20 response rate between 
E6011 and placebo and its 2-sided 95% confidence interval will also be calculated. 
Analyses for the Secondary Endpoints 
Analyses for Weeks 0 to 12 of the Treatment Phase  
For ACR20 (excluding Week 12), ACR50 and ACR70 response rates at each evaluation time 
point, similar analyses to primary analyses will be conducted. 
For each component of ACR (number of tender joints, number of swollen joints, VAS [patient’s 
pain assessment and patient’s disease activity global assessment, and physician’s disease activity 
assessment], patient’s physical function assessment [HAQ] and CRP/ESR), DAS28-ESR, DAS28-
CRP, SDAI and CDAI, summary statistics (mean, standard deviation, median, and range) for 
values and changes from the baseline will be calculated by treatment group (E6011 and placebo 
groups) and evaluation time point.  The changes from baseline will also be analyzed by using 
ANCOVA with baseline value, number of biologics with inadequate response, and CRP level at 
the Screening Phase as covariates.  The significance level for comparisons between placebo and 
E6011 is α=0.05 (2-sided). 
For EULAR response classification and disease activity classification based on DAS28-ESR and 
DAS28-CRP, shift tables will be created by treatment group (E6011 and placebo) and evaluation 
time point.  
For remission rates based on each remission criteria (DAS28-ESR, DAS28-CRP, SDAI, CDAI, 
and Boolean), similar analyses to primary analyses will be conducted. 
Analyses for the entire Treatment Phase 
Summary statistics for each efficacy endpoint will be calculated by treatment group 
(placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups) and evaluation 
time point.  In addition, summary statistics for each efficacy endpoint will be calculated by 
evaluation time point using values at Week 12 as baseline. 
< Pharmacokinetic Analyses > 
Analyses for Weeks 0 to 12 of the Treatment Phase 
Summary statistics for serum E6011 concentrations at each specified time point will be calculated. 
Serum E6011 concentration-time profiles will be plotted.   
Analyses for the entire Treatment Phase 
Summary statistics for serum E6011 concentrations at each specified time point will be calculated 
by treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg 
groups). Serum E6011 concentration-time profiles will be plotted.   
Population pharmacokinetic analyses will be conducted.  Data from other studies will be 
integrated as necessary.  E6011 concentration data will be used to build PK models.  The models 
may be used to explore the relationship between PK and covariates.  The relationship between 
serum E6011 concentrations and biomarkers and/or efficacy will also be investigated through 
population PK/PD modeling.  For population PK, the details will be described in the separately 
prepared analysis plan and its report, and the results will not be included in the clinical study 
report.   
< Biomarkers> 
Analyses for Weeks 0 to 12 of the Treatment Phase 

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Summary statistics for values, and changes and percent changes from baseline of serum RF 
concentration, serum anti-CCP antibody concentration, and serum MMP-3 concentration, serum 
TRACP-5b concentration, serum cytokine concentration, serum LRG1 concentration, serum Ang2 
concentration, Vectra™ DA and its components (VCAM-1, epidermal growth factor [EGF], 
vascular endothelial growth factor [VEGF]-A, IL-6, tumor necrosis factor receptor-I [TNF-RI], 
MMP-1, MMP-3, YKL-40, leptin, resistin, serum amyloid A [SAA], and CRP), by treatment 
group (E6011 and placebo groups) and evaluation time point, will be calculated.   
Analyses for the entire Treatment Phase 
Summary statistics for each biomarker will be calculated by treatment group (placebo/200 mg, 
placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups) and evaluation time point.  In 
addition, summary statistics for each biomarker will be calculated by evaluation time point using 
values at Week 12 as baseline. 
Exploratory investigations of the relationship between efficacy and biomarkers will be conducted. 
Details and results of analyses of immunocytes such as blood CX3CR1-positive cells will be 
provided in a separate report, and will not be included in the clinical study report. 
< Immunogenicity > 
All immunogenicity analyses will be performed using the Safety Analysis Set.   
Analyses for Weeks 0 to 12 of the Treatment Phase 
The percentage and frequency of occurrences will be calculated for serum anti-E6011 antibodies 
by treatment group (E6011 and placebo groups) and evaluation time point.  If anti-E6011 antibody 
develops, the frequency and percentage of any anti-E6011 antibody neutralization activity and 
isotypes will be calculated. 
Analyses for the entire Treatment Phase 
Similar analyses to those described for Weeks 0 to 12 of the Treatment Phase will be conducted 
by treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg 
groups). 
In addition, similar analyses will be conducted for the period after Weeks 12 (12 weeks after 
starting E6011 dose) using values at Week 12 as baseline. 
< Safety Analyses > 
All safety analyses will be performed on the Safety Analysis Set.  Safety endpoints include AEs, 
clinical laboratory parameters, vital signs, standard 12-lead ECG, chest X-rays, neurological findings, 
and blood CD4-positive cell counts. 
Analyses for Weeks 0 to 12 of the Treatment Phase 
Summary statistics for safety data, presented by treatment group (E6011 and placebo groups), will 
be calculated on an “as treated” basis (n, mean, standard deviation, median, minimum, maximum 
for continuous variables; n and percentage for categorical variables).  
• 
Incidence (%) of AEs occurring postdose will be calculated by treatment group  
• 
For clinical laboratory parameters, vital signs, and blood CD4-positive cell counts, summary 
statistics for each value and change from baseline will be calculated by treatment group 
• 
For standard 12-lead ECG, chest x-ray, and neurological findings, frequency and percentage of 
abnormal findings will also be calculated by treatment group  
Analyses for the entire Treatment Phase 

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Similar analyses to those described for Weeks 0 to 12 of the Treatment Phase will be conducted 
by treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg 
groups). 
In addition, similar analyses will be conducted for the period after Weeks 12 (12 weeks after 
starting E6011 dose) using values at Week 12 as baseline. 
 
As to the Extension Phase, similar analyses to those for the entire Treatment Phase will be conducted 
for efficacy, pharmacokinetics (except for population PK and PK/PD analyses), biomarker, 
immunogenicity, and safety endpoints by treatment group (placebo/200 mg, placebo/400 mg, 
400 mg/200 mg, and 400 mg/400 mg groups). 
Interim Analyses 
No interim analysis is planned for this study. 
Sample Size Rationale 
Since the objectives for the study are to explore the efficacy and safety of E6011 repeated 
subcutaneous administration at Weeks 0, 1, 2, and every 2 weeks until Week 10 at 400 mg, then 
E6011 200 mg or 400 mg every 2 weeks between Weeks 12 and 22, and every 2 weeks afterwards at 
200 mg in RA subjects inadequately responding to biologics, neither clinical hypotheses nor 
judgement criteria are set, and the sample size calculation is not based on statistical considerations. 
However, the sample sizes of 30 for each treatment group will have about 80% power to detect a 
difference in response rate of 35% if ACR20 response rate for placebo is 20% to 25% at Week 12 
based on a chi-square test. 

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3 
TABLE OF CONTENTS 
1 
TITLE PAGE .....................................................................................................................1 
2 
CLINICAL PROTOCOL SYNOPSIS ...............................................................................2 
3 
TABLE OF CONTENTS .................................................................................................13 
4 
LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS ..................................17 
5 
ETHICS............................................................................................................................19 
5.1 
Institutional Review Boards/Independent Ethics Committees ..............................19 
5.2 
Ethical Conduct of the Study .................................................................................19 
5.3 
Subject Information and Informed Consent ...........................................................19 
6 
INVESTIGATORS AND STUDY PERSONNEL ..........................................................20 
7 
INTRODUCTION ...........................................................................................................20 
8 
STUDY OBJECTIVES ....................................................................................................22 
8.1 
Primary Objectives .................................................................................................22 
8.2 
Secondary Objective ..............................................................................................22 
8.3 
Exploratory Objective ............................................................................................22 
9 
INVESTIGATIONAL PLAN ..........................................................................................22 
9.1 
Overall Study Design and Plan ..............................................................................22 
9.1.1 
Screening Phase ...........................................................................................23 
9.1.2 
Observation Phase (Day 1: Predose) ............................................................24 
9.1.3 
Treatment Phase ...........................................................................................24 
9.1.4 
Extension Phase ...........................................................................................24 
9.1.5 
Follow-up Phase...........................................................................................25 
9.2 
Discussion of Study Design, Including Choice of Control Groups .......................25 
9.3 
Selection of Study Population ................................................................................26 
9.3.1 
Inclusion Criteria .........................................................................................26 
9.3.2 
Exclusion Criteria ........................................................................................26 
9.3.3 
Removal of Subjects From Therapy or Assessment ....................................30 
9.4 
Treatments..............................................................................................................30 
9.4.1 
Treatments Administered .............................................................................30 
9.4.2 
Identity of Investigational Products .............................................................32 
9.4.2.1 
Chemical Name and Structural Formula of E6011 ..............................33 
9.4.2.2 
Comparator Drug .................................................................................33 
9.4.2.3 
Labeling for Study Drug ......................................................................33 
9.4.2.4 
Storage Conditions ...............................................................................34 
9.4.3 
Method of Assigning Subjects to Treatment Groups ...................................34 
9.4.4 
Selection of Doses in the Study ...................................................................35 
9.4.5 
Selection and Timing of Dose for Each Subject ..........................................36 
9.4.6 
Blinding........................................................................................................36 

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9.4.7 
Prior and Concomitant Therapy ...................................................................37 
9.4.7.1 
Prohibited Concomitant Therapies and Drugs .....................................37 
9.4.7.1.1 
Prohibited Concomitant Therapies and Drugs ...............................37 
9.4.7.1.2 
Restricted Concomitant Therapies and Drugs ...............................38 
9.4.8 
Treatment Compliance .................................................................................38 
9.4.9 
Drug Supplies and Accountability ...............................................................38 
9.5 
Study Assessments .................................................................................................39 
9.5.1 
Assessments .................................................................................................39 
9.5.1.1 
Demography .........................................................................................39 
9.5.1.2 
Assessments in the Screening and Observation Phases .......................39 
9.5.1.2.1 
Smoking History, Medical History/Complications, and 
Physical Examinations ...................................................................39 
9.5.1.2.2 
Prior Medications ...........................................................................40 
9.5.1.2.3 
Disease Characteristics of RA .......................................................40 
9.5.1.2.4 
Other Assessments .........................................................................40 
9.5.1.3 
Efficacy Assessments ...........................................................................40 
9.5.1.3.1 
Assessment of Tender and Swollen Joint Counts ..........................40 
9.5.1.3.2 
Assessment Using Visual Analog Scale (VAS) .............................41 
9.5.1.3.3 
Assessment Using Health Assessment Questionnaire (HAQ) .......41 
9.5.1.3.4 
Assessment of Erythrocyte Sedimentation Rate (ESR) .................42 
9.5.1.3.5 
Assessment of C-reactive protein (CRP) .......................................42 
9.5.1.4 
Pharmacokinetic, Pharmacogenomic, Biomarker, and 
Immunogenicity Assessments ..............................................................42 
9.5.1.4.1 
Pharmacokinetic Assessments .......................................................42 
9.5.1.4.2 
Pharmacogenomic Assessments ....................................................42 
9.5.1.4.3 
Assessments of Biomarkers ...........................................................42 
9.5.1.4.4 
Immunogenicity Assessments ........................................................43 
9.5.1.5 
Safety Assessments ..............................................................................44 
9.5.1.5.1 
Adverse Events and Events Associated with Special Situations ...44 
9.5.1.5.2 
Serious Adverse Events and Events Associated with Special 
Situations........................................................................................45 
9.5.1.5.3 
Laboratory Measurements .............................................................46 
9.5.1.5.4 
Vital Signs and Weight Measurements ..........................................47 
9.5.1.5.5 
Physical Examinations ...................................................................47 
9.5.1.5.6 
Electrocardiograms ........................................................................48 
9.5.1.5.7 
Other Safety Assessments ..............................................................48 
9.5.1.6 
Other Assessments ...............................................................................49 
9.5.2 
Schedule of Procedures/Assessments ..........................................................49 
9.5.2.1 
Study Schedule.....................................................................................49 

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9.5.2.2 
Volume of Blood Samples ...................................................................55 
9.5.3 
Appropriateness of Measurements ...............................................................56 
9.5.4 
Reporting of Serious Adverse Events, Pregnancy, and Events 
Associated with Special Situations ..............................................................58 
9.5.4.1 
Reporting of Serious Adverse Events ..................................................58 
9.5.4.2 
Reporting of Pregnancy and Exposure to Study Drug Through 
Breastfeeding .......................................................................................58 
9.5.4.3 
Reporting of Events Associated with Special Situations .....................59 
9.5.4.3.1 
Reporting of Adverse Events Associated With Study Drug 
Overdose, Misuse, Abuse, or Medication Error ............................59 
9.5.4.4 
Expedited Reporting ............................................................................59 
9.5.4.5 
Breaking the Blind ...............................................................................59 
9.5.4.6 
Regulatory Reporting of Adverse Events ............................................60 
9.5.5 
Completion/Discontinuation of Subjects .....................................................60 
9.5.6 
Abuse or Diversion of Study Drug ..............................................................61 
9.5.7 
Confirmation of Medical Care by Another Physician .................................61 
9.6 
Data Quality Assurance .........................................................................................61 
9.6.1 
Data Collection ............................................................................................61 
9.6.2 
Clinical Data Management ..........................................................................61 
9.7 
Statistical Methods .................................................................................................61 
9.7.1 
Statistical and Analytical Plans ....................................................................62 
9.7.1.1 
Study Endpoints ...................................................................................62 
9.7.1.1.1 
Primary Endpoint ...........................................................................62 
9.7.1.1.2 
Secondary Endpoints .....................................................................62 
9.7.1.2 
Definitions of Analysis Sets.................................................................64 
9.7.1.3 
Subject Disposition ..............................................................................64 
9.7.1.4 
Demographic and Other Baseline Characteristics ...............................64 
9.7.1.5 
Prior and Concomitant Therapy ...........................................................64 
9.7.1.6 
Efficacy Analyses ................................................................................65 
9.7.1.6.1 
Primary Efficacy Analysis .............................................................65 
9.7.1.6.2 
Secondary Efficacy Analyses ........................................................65 
9.7.1.7 
Pharmacokinetic, Pharmacodynamic, Pharmacogenomic, and 
Other Biomarker Analyses ...................................................................66 
9.7.1.7.1 
Pharmacokinetic and Pharmacodynamic Analyses .......................66 
9.7.1.7.2 
Pharmacogenomic, Biomarker, and Immunogenicity Analyses ....66 
9.7.1.8 
Safety Analyses ....................................................................................67 
9.7.1.8.1 
Extent of Exposure .........................................................................67 
9.7.1.8.2 
Adverse Events ..............................................................................68 
9.7.1.8.3 
Laboratory Values ..........................................................................68 

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9.7.1.8.4 
Vital Signs ......................................................................................69 
9.7.1.8.5 
Electrocardiograms ........................................................................69 
9.7.1.8.6 
Other Safety Analyses ....................................................................69 
9.7.1.9 
Extension Phase Analyses....................................................................69 
9.7.2 
Determination of Sample Size .....................................................................69 
9.7.3 
Interim Analysis ...........................................................................................70 
9.7.4 
Other Statistical/Analytical Issues ...............................................................70 
9.7.5 
Procedure for Revising the Statistical Analysis Plan ...................................70 
10 REFERENCE LIST .........................................................................................................70 
11 PROCEDURES AND INSTRUCTIONS (ADMINISTRATIVE PROCEDURES) .......73 
11.1 
Changes to the Protocol .........................................................................................73 
11.2 
Adherence to the Protocol ......................................................................................73 
11.3 
Monitoring Procedures...........................................................................................73 
11.4 
Recording of Data ..................................................................................................74 
11.5 
Identification of Source Data .................................................................................74 
11.6 
Retention of Records ..............................................................................................74 
11.7 
Auditing Procedures and Inspection ......................................................................75 
11.8 
Handling of Study Drug .........................................................................................75 
11.9 
Publication of Results ............................................................................................75 
11.10 Disclosure and Confidentiality ..............................................................................76 
11.11 Discontinuation of Study .......................................................................................76 
11.12 Subject Insurance and Indemnity ...........................................................................76 
12 APPENDICES .................................................................................................................77 
LIST OF IN-TEXT TABLES 
Table 1 
Dose and Administration of the Study Drug..............................................32 
Table 2 
Study Drugs ...............................................................................................33 
Table 3 
Clinical Laboratory Tests ...........................................................................47 
Table 4 
Schedule of Procedures/Assessments in Study E6011-J081-202 ..............51 
Table 5 
Volume of Blood Samples .........................................................................56 
LIST OF IN-TEXT FIGURES 
Figure 1 
Study Design ..............................................................................................23 

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4 
LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS 
Abbreviation 
Term 
ACR 
American College of Rheumatology 
ADL 
activities of daily living 
ANCOVA 
analysis of covariance 
Ang2 
angiopoietin 2 
ALP 
alkaline phosphatase 
ALT 
alanine aminotransferase (SGPT) 
AST 
aspartate aminotransferase (SGOT) 
ATC 
anatomical therapeutic chemical 
BUN 
blood urea nitrogen 
CCP 
cyclic citrullinated peptide 
CDAI 
clinical disease activity index 
CH50 
50% hemolytic unit of complement 
CRA 
clinical research associate 
CRO 
contract research organization 
CRP 
C-reactive protein 
CTCAE 
common terminology criteria for adverse events 
CX3CR1 
CX3C motif chemokine receptor 1 (receptor of fractalkine) 
DAS 
disease activity score 
DNA 
deoxyribonucleic acid 
DMARDs 
disease-modifying antirheumatic drugs 
EGF 
epidermal growth factor 
ESR 
erythrocyte sedimentation rate 
EULAR 
European League Against Rheumatism 
FAS 
full analysis set 
FKN 
fractalkine 
γ-GTP 
γ-glutamine transpeptidase 
GCP 
good clinical practice 
GM-CSF 
granulocyte macrophage colony-stimulating factor 
HAQ 
health assessment questionnaire 
HbA1c 
hemoglobin A1c 
HBc 
hepatitis B virus core 
HBs 
hepatitis B virus surface 
HBV 
hepatitis B virus 
HCV 
hepatitis C virus 
HIV 
human immunodeficiency virus 
HTLV-1 
human T cell lymphotropic virus-1 
ICAM-1 
intercellular adhesion molecule-1 
ICH 
International Conference on Harmonization 

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Abbreviation 
Term 
IFN-γ 
interferon-γ 
IgG 
immunoglobulin G 
IL 
interleukin 
IVRS/IWRS 
interactive voice/web response systems 
LDH 
lactate dehydrogenase 
LRG1 
leucine-rich alpha-2 glycoprotein 1 
MedDRA 
Medical Dictionary for Regulatory Activities 
MMP 
matrix metalloproteinase 
MRI 
magnetic resonance imaging system 
MTX 
methotrexate 
NSAIDs 
nonsteroidal antiinflammatory drug 
PD 
pharmacodynamics 
PK 
pharmacokinetics 
PML 
progressive multifocal leukoencephalopathy 
PPS 
per protocol set 
PT 
preferred term 
QOL 
quality of life 
QTcF 
QT interval corrected for heart rate using Fridericia’s formula 
RA 
rheumatoid arthritis 
RF 
rheumatoid factor 
SAA 
serum amyloid A 
SDAI 
simple disease activity index 
SOC 
system organ class 
SOP 
standard operating procedures 
TEAE 
treatment-emergent adverse events 
TNFα 
tumor necrosis factor α 
TNF-RI 
tumor necrosis factor receptor-I 
TRACP-5b 
tartrate resistant acid phosphatase 5b 
VAS 
visual analog scale 
VCAM-1 
vascular cell adhesion molecule-1 
VEGF 
vascular endothelial growth factor 
WHO DD 
World Health Organization Drug Dictionary 
 

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5 
ETHICS 
5.1 
Institutional Review Boards/Independent Ethics Committees 
The protocol, informed consent form (ICF), and appropriate related documents must be 
reviewed and approved by an Institutional Review Board (IRB) constituted and functioning 
in accordance with Good Clinical Practice (GCP).  Any protocol amendment or revision to 
the ICF will be resubmitted to the IRB for review and approval, except for changes involving 
only logistical or administrative aspects of the study (e.g., change in CRA[s], change of 
telephone number[s]).  Documentation of IRB compliance with the GCP regarding 
constitution and review conduct will be provided to the sponsor. 
A signed letter of study approval from the IRB chairman must be sent to the head of the 
medical institution with a copy to the sponsor before study start and the release of any study 
drug to the site by the sponsor or its designee.  If the IRB decides to suspend or terminate the 
study, the head of the medical institution will immediately send the notice of study 
suspension or termination by the IRB to the sponsor. 
Study progress is to be reported to IRB annually (or as required) by the investigator via the 
head of the medical institution.  The sponsor will submit periodic reports and inform the 
investigator and the relevant IRB via the head of the medical institution of any reportable 
adverse events (AEs) per GCP and local IRB standards of practice.  Upon completion of the 
study, the investigator will provide the IRB and the sponsor with a brief report of the 
outcome of the study. 
5.2 
Ethical Conduct of the Study 
This study will be conducted in accordance with standard operating procedures of the 
sponsor (or designee), which are designed to ensure adherence to the following: 
• 
Principles of the World Medical Association Declaration of Helsinki (Ethical Principles 
for Medical Research Involving Human Subjects) 
• 
GCP 
• 
Article 14, Paragraph 3, and Article 80-2 of the Pharmaceutical Affairs Law (Law No. 
145, 1960) 
5.3 
Subject Information and Informed Consent 
As part of administering the informed consent document, the investigator or subinvestigator 
must explain to each subject (or guardian/legally acceptable representative) the nature of the 
study, its purpose, the procedures involved, the expected duration, the potential risks and 
benefits involved, any potential discomfort, potential alternative procedure(s) or course(s) of 
treatment available to the subject, and the extent of maintaining confidentiality of the 
subject’s records.  Each subject must be informed that participation in the study is voluntary, 
that he/she may withdraw from the study at any time, and that withdrawal of consent will not 
affect his/her subsequent medical treatment or relationship with the treating physician. 

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This informed consent should be given by means of a standard written statement, written in 
nontechnical language.  The subject (or the subject’s legally acceptable representative) 
should understand the statement before signing and dating it and will be given a copy of the 
signed document.  The subject will be asked to sign an ICF before any study-specific 
procedures are performed.  No subject can enter the study before his/her informed consent 
has been obtained. 
An unsigned copy of an IRB-approved ICF must be prepared in accordance with GCP and all 
applicable local regulations.  Each subject must sign an approved ICF before study 
participation.  The form must be signed and dated by the investigator or subinvestigator (and 
clinical research coordinator, if required).  The original, signed ICF for each subject will be 
verified by the sponsor and kept on file according to local procedures at the site.  The subject 
(or the subject’s legally acceptable representative should be informed in a timely manner if 
new information becomes available that may be relevant to the subject’s willingness to 
continue participation in the study.  The communication of this information should be 
documented. 
6 
INVESTIGATORS AND STUDY PERSONNEL 
This study will be conducted by qualified investigators under the sponsorship of Eisai (the 
sponsor) at approximately 30 investigational sites in Japan. 
The name and telephone and fax numbers of the medical monitor and other contact personnel 
at the sponsor are listed in Appendix 2. 
7 
INTRODUCTION 
Rheumatoid arthritis (RA) is an autoimmune disease characterized by the inflammation of 
synovium in a joint.  Its major clinical symptoms are pain and swelling of joints of limbs.  
Progressed inflammation of synovium causes joint destruction, which leads to impaired 
activity of daily living (ADL) and eventually lowers quality of life (QOL).  Joint dysfunction 
may be reversible after treatment in many cases at the onset, but it often becomes irreversible 
after the development of joint destruction.  In addition, prolonged disease increases the 
incidence of complications such as interstitial pneumonia and secondary amyloidosis.  As a 
result, RA patients are considered to have a shorter life expectancy than healthy adult people 
by approximately 10 years due to events including cardiovascular system associated with 
infection and inflammation as well as dysfunction caused by joint destruction (Tanaka Y, 
2011; Miyasaka N, 2013).  
Estimated prevalence of RA is approximately 1% of the world population, of which 600,000 
to 700,000 are Japanese.  Patients most commonly affected are women in their 40’s to 50’s, 
who are in their most productive years. This causes significant psychological, social, and 
financial burdens to their family in addition to their own physical difficulties (Ochi T, et al., 
2004). 
Disease-modifying antirheumatic drugs (DMARDs) have been mainly used to treat RA 
patients, with methotrexate (MTX) being the standard medication.  However, some patients 

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do not sufficiently benefit from DMARD therapy as they experience adverse reactions, or do 
not adequately respond to DMARDs (Kremer JM, 2001).  
There are several reports about excellent clinical performance, indicating that the emergence 
of biologics such as anti-TNF agents can improve clinical symptoms, prevent joint 
destruction progression, and improve impaired physical function in patients who do not 
adequately respond to DMARD therapy (Maini R, et al., 1999; Nishimoto N, et al., 2007; 
Takeuchi T, et al., 2013).  Meanwhile, the remission rate is approximately 20% to 40% after 
biologics treatment (Takeuchi T, 2010) and there are patients who are unable to continue the 
treatment due to the adverse reactions.  Thus, medical needs are not fully satisfied and 
development of highly effective and safer drugs with a new mechanism of action is eagerly 
anticipated. 
E6011 is the world’s first humanized fractalkine (FKN) monoclonal antibody (mAb).  The 
antibody was created in KAN Research Institute, Inc., a research subsidiary of Eisai Co., Ltd.  
FKN is thought to have both chemotaxis and adhesive effects to leukocytes and to play an 
important role on cell invasions in inflamed tissues (Imai T, et al., 2005).  E6011 inhibited 
human FKN-induced migration of human fractalkine receptor (CX3CR1) expressing mouse 
B lymphocyte precursor cells, in vitro.  In a collagen-induced arthritis (CIA) model in mice, a 
widely used animal model for RA, administrations of FKN monoclonal antibodies against 
mouse FKN showed amelioration of the status of RA.  CX3CR1 and FKN are reported to be 
strongly expressed in the synovium of patients with RA (Nanki T, et al., 2002) and the 
relationship with RA is suggested.  FKN is reported to be involved in the differentiation of 
osteoclast (Koizumi K, et al., 2009); thus, E6011 is also expected to have an inhibitory effect 
against the structural damage of joints through inhibition of bone absorption in RA. 
A Phase 1 clinical study of single intravenous (IV) administration of E6011 in healthy adults 
(E6011-J081-001, hereinafter called Study 001) and a Phase 1 clinical study of single 
subcutaneous (SC) administration of E6011 in healthy adults (E6011-J081-002, hereinafter 
called Study 002) have been completed. In Study 001 (IV: 0.0006 to 10 mg/kg) and Study 
002 (SC: 50 to 400 mg), adverse events which could affect safety and tolerability have not 
been observed in any dose group. 
In a Phase 1/2 clinical study of repeated subcutaneous administrations of E6011 in RA 
subjects (E6011-J081-103, hereinafter called Study 103), we evaluated the safety and 
efficacy of E6011 at repeated subcutaneous administrations of 100 mg, 200 mg, and 400 mg 
as primary objective.  Analysis of 12-week dosing presented no concerns about the safety 
and tolerability in RA subjects who repeatedly received E6011 at 100 to 400 mg and the 
clinical symptoms of RA tended to be improved in exploratory efficacy evaluations.   
This is a double-blind, placebo-controlled, parallel-group study (E6011-J081-202, hereinafter 
called Study 202) to explore the efficacy and safety of E6011 in RA patients with an 
inadequate response to biologics. 

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8 
STUDY OBJECTIVES 
The following assessments will be conducted on repeated subcutaneous administrations of 
E6011 in RA patients inadequately responding to biologics. 
8.1 
Primary Objectives 
• 
To evaluate the efficacy of E6011 by comparing ACR20 response rate at Week 12 with 
placebo as the primary endpoint 
• 
To evaluate the safety and tolerability of E6011 
8.2 
Secondary Objective 
• 
To evaluate the pharmacokinetics (PK) and immunogenicity of E6011 
8.3 
Exploratory Objective 
• 
To explore the PK/pharmacodynamics (PD) of E6011 and biomarkers 
9 
INVESTIGATIONAL PLAN 
9.1 
Overall Study Design and Plan 
This study is a multicenter, randomized, double-blind, placebo-controlled, parallel-group 
comparison study.  E6011 and placebo groups are set for the study.  Subjects will receive 
E6011 400 mg or placebo at Weeks 0, 1, 2, and every 2 weeks until Week 10 and then E6011 
200 mg or 400 mg every 2 weeks between Weeks 12 and 22. 
The study consists of Screening, Observation, Treatment, Extension, and Follow-up Phases. 
Screening assessments will be performed within 42 days prior to the study treatment, and 
subjects with the certain eligibility confirmed in the Observation Phase will be allocated to 
E6011 400 mg or placebo at a 1:1 ratio through dynamic allocation using the following 
factors: number of biologics with inadequate response, C-reactive protein (CRP) level at the 
Screening Phase. Subjects who will continue the study beyond Week 12 will be further 
allocated to E6011 200 mg or 400 mg at a 1:1 ratio in the initially assigned group (E6011 or 
placebo group) through dynamic allocation using the same factors as above. 
In the Treatment Phase (24 weeks), subjects will receive either E6011 400 mg or placebo at 
Weeks 0, 1, 2, and every 2 weeks subsequently until Week 10 and then E6011 200 mg or 
400 mg every 2 weeks between Weeks 12 and 22 in a double-blind manner.   
Subjects who complete evaluations at Week 24 of the Treatment Phase will enter the 
Extension Phase.  The Extension Phase is up to 104 weeks after the start of the study 
treatment, and subjects will receive an open-label E6011 200 mg every 2 weeks until 
Week 102.   

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If the investigator or subinvestigator judges that the response to treatment is insufficient in 
the Extension Phase, administration of E6011 400 mg every 2 weeks will also be allowed 
(reduction of the dose back to 200 mg after an increase to 400 mg will also be allowed). 
 
If subjects complete or discontinue the study, a follow-up visit should be conducted 28 days 
after the completion or discontinuation of the study, and a follow-up visit or telephone 
interview should be conducted 70 days after the last dosing. 
An overview of the study design is presented in Figure 1. 
Observation 
Phase 
Primary endpoint 
 
 
Screening 
Phase 
Treatment Phase 
(Double-blind) 
Extension Phase 
(Open label) 
Days –42 to –1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Week 0 1 
2 
4 
6 
8 
10 12 14 16 18 20 22 24 26 28 30 32 
……… 
104 
Figure 1 
Study Design 
a: If the investigator or subinvestigator judges that response to treatment is insufficient during the 
Extension Phase, administration of E6011 400 mg every 2 weeks will also be allowed. 
In addition, if subjects complete or discontinue the study, a follow-up visit should be conducted 28 days 
after the completion or discontinuation of the study, and a follow-up visit or telephone interview should 
be conducted 70 days after the last dosing. 
 
9.1.1 
Screening Phase 
Subjects must be fully informed of the nature of the study and written informed consent must 
be obtained prior to the start of any assessment/evaluation for this study.  The procedure for 
obtaining informed consent is described in Section 5.3. 

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Subjects who submitted informed consent will undergo screening evaluations between  
Day –42 and Day –1 to confirm that each subject meets all the inclusion criteria and none of 
the exclusion criteria.   
Results of the screening assessments will be recorded in the CRF.  If a subject is judged 
ineligible to enroll the study, the reason should also be recorded in the CRF. 
For subjects who require prophylactic treatments with isoniazid based on the results of the 
tuberculosis test at the Screening Phase, the prophylactic treatments are needed for at least 21 
days before starting the study treatment, so the duration of the Screening Phase may be 
extended until 21 days from the start of isoniazid administrations.  If a patient requires 
another syphilis test based on the result in the Screening Phase, reexamination has to be 
performed after an interval of 21 days or longer during the Screening Phase. The Screening 
Phase can be extended until the reexamination result is obtained. 
9.1.2 
Observation Phase (Day 1: Predose) 
Subjects who complete the assessments in the Screening and Observation Phases and meet 
the criteria for inclusion/exclusion (Sections 9.3.1 and 9.3.2) will start the Treatment Phase. 
9.1.3 
Treatment Phase 
Subjects with confirmed eligibility in the Observation Phase to enter the study will be 
allocated to E6011 or placebo group at a 1:1 ratio through dynamic allocation using the 
following factors: number of biologics with inadequate response, CRP level at the Screening 
Phase.  Subjects will receive either E6011 or placebo at Weeks 0, 1, 2, and then every 2 
weeks until Week 10 in a double-blind manner.   
Subjects who will continue the study beyond Week 12 will be further allocated to E6011 
200 mg or 400 mg at a 1:1 ratio in the initially assigned group (E6011 or placebo group) 
through dynamic allocation using the number of biologics with inadequate response and CRP 
level at the Screening Phase as factors.  The subjects will receive 200 mg or 400 mg every 2 
weeks between Weeks 12 and 22 in a double-blind manner (placebo/200 mg, 
placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups).  The investigator or 
subinvestigator must confirm that all data collected up to Week 12 are completely entered 
into CRFs by Week 14. 
9.1.4 
Extension Phase 
Subjects who complete evaluations at Week 24 of the Treatment Phase will enter the 
Extension Phase.  The investigator or subinvestigator must confirm that all data through 
Week 24 of the Treatment Phase (the double-blind part) are completely entered into CRFs by 
Week 26, when the initial assessments in the Extension Phase will be performed. Each 
subject’s assigned treatment group will be blinded until the database of the Treatment Phase 
is fixed. 
The Extension Phase is up to 104 weeks after the start of the study treatment, and subjects 
will receive an open-label E6011 200 mg every 2 weeks until Week 102.  If the investigator 

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or subinvestigator judges that the response to treatment is insufficient in the Extension Phase, 
administration of E6011 400 mg every 2 weeks will also be allowed (reduction of the dose 
back to 200 mg after an increase to 400 mg will also be allowed).Follow-up Phase 
If subjects complete or discontinue the study, a follow-up visit should be conducted 28 days 
after the completion or discontinuation of the study, and a follow-up visit or telephone 
interview should be conducted 70 days after the last dosing. 
9.1.5 
Follow-up Phase 
If subjects complete or discontinue the study, a follow-up visit should be conducted 28 days 
after the completion or discontinuation of the study, and a follow-up visit or telephone 
interview should be conducted 70 days after the last dosing. 
9.2 
Discussion of Study Design, Including Choice of Control Groups 
This study was designed to explore the efficacy and safety of repeated subcutaneous 
administrations of E6011 in RA patients with an inadequate response to biologics after 
administrations E6011. 
Randomization will be used for avoiding bias in assigning subjects to treatment groups, and 
making the distributions of subject characteristics (such as demographics and other baseline 
characteristics), known and unknown, of treatment groups be similar, as well as improving 
the validity of statistical comparison among groups.  Blinding will be also employed to avoid 
the occurrence of bias in data collections or evaluation of endpoints.  In this study, placebo 
will be used as a comparator drug and subjects will be randomized to treatment groups, 
through dynamic allocation using the following factors with a potential impact on efficacy 
evaluations: number of biologics with inadequate response, CRP level at the Screening 
Phase. 
The guideline of the European League Against Rheumatism (EULAR) (Josef SS, et al., 
2013), the guideline of the American College of Rheumatology (ACR) (Singh JA, et al., 
2016), and the guideline for the use of TNF inhibitors of the Japan College of Rheumatology 
indicate that drug therapies for RA should be reviewed every 3 or 6 months.  “The guideline 
for the clinical evaluation of antirheumatic drugs” also describes that the duration of Phase 3 
study should be determined according to the properties of an investigational drug and should 
be approximately 12 weeks in general or up to 6 months as needed.  In fact, many clinical 
studies in RA patients are designed to have a primary evaluation time point at Week 12 or 24. 
The objective of this study is to explore the efficacy of E6011 in RA subjects with an 
inadequate response to biologics under a minimum number of subjects.  Since the result from 
Study 103 suggested the efficacy of E6011 in its 12-week treatment period, the primary 
endpoint of this study is determined to be ACR20 response rate at Week 12.  For further 
evaluation of the exploratory efficacy and safety of E6011 in longer treatment, the double-
blind part is continued until Week 24 (see Section 9.4.4 “Selection of Doses in the Study” for 
details). 

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Aiming to collect data on the long-term safety in RA patients with an inadequate response to 
biologics after Week 24, we set the Extension Phase from Week 24 up to Week 104.  As our 
target is subjects who failed to receive a sufficient therapeutic benefit from existing 
biologics, we consider that the study design where they can continue E6011 treatment even 
after Week 24 is useful from the perspective of subjects’ benefit.   
Furthermore, if the subjects insufficiently respond to the treatment in the Extension Phase, 
the design also allows for administration of E6011 400 mg every 2 weeks 
The Follow-up Phase was set to be 70 days after the last dose of the study drug, which is 
approximately 5 times of the longest half-life of E6011 in the previous clinical data. 
9.3 
Selection of Study Population 
Subjects who meet all of the inclusion criteria and do not meet any of the exclusion criteria 
will be eligible to receive study drug. 
9.3.1 
Inclusion Criteria 
Subjects must meet all of the following criteria to participate in this study: 
1. Aged ≥18 and <75 years old at the time of written informed consent 
2. RA patients who meet the 1987 ACR criteria or 2010 ACR/EULAR criteria ≥12 weeks 
before written informed consent 
3. Received biologics treatment under approved dosage and administration for ≥12 weeks 
but discontinued it before screening because of inadequate response 
4. The history of biologics treatmentNote discontinued due to inadequate response should be 
limited to 2 agents among adalimumab, infliximab, golimumab, certolizumab pegol, 
etanercept, tocilizumab, and abatacept (including biosimilars). 
(Note: This includes those treated in clinical studies) 
5. Presented ≥6 tender joints (out of 68 joints) and ≥6 swollen joints (out of 66 joints) in the 
Screening and Observation Phases 
6. Able to continue a stable dose regimen of MTX at 6 to 16 mg/week from 4 weeks or 
more before the starting the study treatment until completion of the Extension Phase (or 
until study discontinuation) 
7. CRP level ≥0.6 mg/dL or erythrocyte sedimentation rate (ESR) ≥28 mm/hr in the 
Screening Phase 
8. Weighs ≥30 kg and ≤100 kg in the Screening Phase 
9. Has voluntarily consented, in writing, to participate in this study.  If a subject is below 
the age of 20, a legally acceptable representative should also provide the written consent 
10. Has been thoroughly briefed on the requirements of the study, can understand, and is 
willing and able to comply with all aspects of the protocol 
9.3.2 
Exclusion Criteria 
Subjects who meet any of the following criteria will be excluded from this study: 

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1. Any history or complication of inflammatory arthritic disorderNote other than RA and 
Sjogren’s syndrome 
(Note: This includes arthritis associated with viral infection, systemic lupus 
erythematosus, mixed connective tissue disease, dermatomyositis/polymyositis, 
scleroderma, rheumatic polymyalgia, psoriatic arthritis, and arthritis occurring in patients 
under 16 years of age) 
2. Class IV in the Criteria for Functional Status in RA (the ACR 1991 Revised Criteria) in 
the Screening Phase 
3. Received biologics during the following periods: 
• 
Adalimumab: 
within 6 weeks before starting the study treatment 
• 
Infliximab:  
within 6 weeks before starting the study treatment 
 
(within 8 weeks for subjects who received a dose of 10 mg/kg) 
• 
Golimumab:  
within 6 weeks before starting the study treatment 
• 
Certolizumab pegol:  within 6 weeks before starting the study treatment 
• 
Etanercept:  
within 2 weeks before starting the study treatment 
• 
Tocilizumab:  
within 6 weeks before starting the study treatment 
• 
Abatacept:  
within 6 weeks before starting the study treatment 
4. Received disease-modifying antirheumatic drugs (DMARDs) other than MTX within 
4 weeks before staring the study treatment 
5. Received leflunomide or tofacitinib within 12 weeks before starting the study treatment 
6. Received corticosteroids equivalent to >10 mg/day of prednisolone within 4 weeks before 
starting the study treatment 
7. Received corticosteroids (intraarticular, intramuscular, or intravenous), intraarticular 
injection of sodium hyaluronate (including sodium hyaluronate crosslinked polymer and 
sodium hyaluronate crosslinked polymer crosslinked with vinylsulfone), intraarticular 
injection of local anesthesia agent, or an analgesic other than NSAIDs (oral, suppository, 
and topical) within 4 weeks before starting the study treatment 
8. Treatment with MTX, folic acid, corticosteroids (equivalent to ≤10 mg/day of 
prednisolone, taken orally or by suppository), or herbal medicine indicated for RA was 
started or dose regimen was modified within 4 weeks before starting the study treatment 
(however, if MTX dose was increased or decreased beyond 4 mg at one time, MTX 
should be used at a stable regimen for 8 weeks before starting the study treatment.) 
9. Underwent arthrocentesis/drainage within 4 weeks before starting the study treatment or 
cytapheresis therapy within 8 weeks before starting the study treatment 
10. Underwent surgical operation on the joint (including synovectomy and repair of tendon 
rupture) which is evaluated in this study within 8 weeks before informed consent 
11. Received cyclophosphamide, cyclosporine (except for eye drop solution), or azathioprine 
within 52 weeks before starting the study treatment 
12. Received immunoglobulin preparations or blood products within 24 weeks before starting 
the study treatment 
13. Received a live vaccine within 12 weeks before starting the study treatment, or is 
planning to receive one 

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14. Any current clinically significant disease (e.g., cardiac, respiratory, gastrointestinal, or 
renal disease) that could affect the subject’s safety or interfere with the conduct of the 
study in the opinion of the investigator or subinvestigator 
15. Any current uncontrolled disorders such as acute cardiac infarction, unstable angina, 
brain infarct, or symptomatic intracerebral hemorrhage 
16. Severe or uncontrolled diabetes 
17. History of severe allergy (shock or anaphylactoid symptoms) 
18. History or current clinical condition of malignant tumor, lymphoma, leukemia, or 
lymphoproliferative disease, except for skin carcinoma (epithelial carcinoma or basal cell 
carcinoma) and cervix carcinoma which have been completely excised and without 
metastasis or recurrence for more than 5 years before informed consent 
19. Immunodeficiency or history of human immunodeficiency virus (HIV) infection 
20. Infection requiring hospitalization or intravenous administration of antibiotics or disease 
requiring administration of antivirus drugs (e.g., herpes zoster) within 4 weeks before 
starting the study treatment 
21. History of tuberculosis or current active tuberculosis 
22. History of clinically important vasculitis 
23. Tested positive for any of the following in the Screening Phase: HIV, hepatitis B virus 
surface antigen (HBs antigen), hepatitis B virus surface antibody (HBs antibody), 
hepatitis B virus core antibody (HBc antibody), hepatitis B virus DNA (HBV DNA), 
hepatitis C virus antibody (HCV antibody), human T-lymphotrophic virus type I antibody 
(HTLV-1 antibody), or syphilis (except if positive for the HBs antibody only, and it is 
clear that this is due to hepatitis B vaccination. In case of positive RPR and negative TP 
antibody results in the syphilis test, the positive result is not considered valid if a false 
positivity is confirmed by repeated TP antibody negative results of other syphilis tests 
performed 21 days or more later).  For subjects who are negative for both HBs antigen 
and HBV-DNA quantitative test and positive for either or both of anti-HBc antibody and 
anti-HBs antibody, their study participation is allowed if the investigator or 
subinvestigator takes a proper measure such as HBV-DNA monitoring based on the 
“Guideline for measures against hepatitis B caused by immunosuppression and 
chemotherapy.” 
24. Positive in tuberculosis test (QuantiFERON®TB Gold Test or T-SPOT®.TB Test) in the 
Screening Phase.  For those whose results are “hold” (indeterminable) in repeated tests, 
their study participation is only allowed if they start receiving a prophylactic treatment 
with isoniazid (in principle, 300 mg/day [5 mg/kg/day in case of low weight] for 
approximately 9 months) ≥21 days before starting the study treatment. 
25. Findings indicating a history of tuberculosis on chest x-ray in the Screening Phase 
26. Neurological findings such as motor paralysis, visual impairment, or language disorder in 
the Screening Phase 
27. Blood CD4-positive cell count <200/μL or white blood cell count <3,000/μL in the 
Screening Phase 
28. Any of the following laboratory abnormalities in the Screening Phase 
• 
Hemoglobin: 
<8.0 g/dL 

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• 
Neutrophil count: <1,500/μL  
• 
Platelet: 
<100,000/μL 
• 
AST or ALT: 
>3×the upper limit of normal (ULN) 
• 
Serum creatinine: >1.5 mg/dL 
• 
Serum KL-6: 
>ULN 
• 
β-D glucan: 
>ULN 
29. Demonstrated prolonged QTcF interval (>450 ms) in repeated ECG examinations 
30. Women of childbearing potential who have a positive pregnancy test in the Screening or 
Observation Phase or of breastfeeding 
31. Women of childbearing potential who: 
• 
Had unprotected sexual intercourse within 30 days before study entry and who do not 
agree to use a highly effective method of contraception (e.g., total abstinence, an 
intrauterine device [IUD], a double-barrier method [such as condom plus diaphragm 
with spermicide], an oral contraceptive, or have a vasectomized partner with 
confirmed azoospermia) throughout the entire study period or for 70 days after the 
last dosing. 
• 
Are currently abstinent, and do not agree to use a double-barrier method (condom 
plus diaphragm with spermicide) during the study period or for 70 days after the last 
dosing. 
• 
Are using oral contraceptives but are not on a stable dose of the same oral 
contraceptives for at least 4 weeks before study treatment, or who do not agree to use 
the same oral contraceptives during the study or for 70 days after the last dosing. 
• 
All women will be considered to be of childbearing potential unless they are 
postmenopausal [amenorrheic for at least 12 consecutive months, in the appropriate 
age group, and without other known or suspected cause] or have been sterilized 
surgically [i.e., either of bilateral tubal ligation, total hysterectomy, or bilateral 
oophorectomy was performed at least 1 month before the start of study treatment]). 
32. Men who have not had a successful vasectomy (without confirmed azoospermia) and 
their female partners do not meet any of the criteria above (however, study entry is 
allowed if the female partner is not of childbearing potential or practicing highly effective 
contraception throughout the study period or for 70 days after the last dosing).  No sperm 
donation is allowed during the study period or for 70 days after the last dosing. 
33. Scheduled for surgery during the study 
34. Currently enrolled in another clinical study or used any investigational drug or device 
within 28 days (or 5× the half-life, whichever is longer) before informed consent 
35. Has been treated with E6011 or any unapproved biologics for RA within 12 weeks before 
the start of study treatment. 
36. Use of a psychotropic agent as recreational purpose other than therapeutic purpose 
37. Any history of a medical condition or a concomitant medical condition that in the opinion 
of the investigator or subinvestigator would compromise the subject’s ability to safely 
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9.3.3 
Removal of Subjects From Therapy or Assessment 
The investigator or subinvestigator may withdraw the subject from the study at any time for 
safety or administrative reasons.  The subject may stop study drug or withdraw from the 
study at any time for any reason. 
All subjects who discontinue study treatment should be followed for procedures/assessments 
at discontinuation as specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, 
Table 4; also see Section 9.5.5 “Completion/Discontinuation of Subjects” for more 
information).  
A subject will be withdrawn from the study under any of the following circumstances. 
1. Occurrence of AE that made it difficult to continue the study 
2. Subject is pregnant. 
3. Subject's ineligibility is confirmed. 
4. Concomitant medication or therapy cannot be continued in accordance with the protocol. 
5. Required surgical operation on arthritic disorder 
6. Diagnosed with malignant tumor 
7. Tested positive in tuberculosis test (QuantiFERON® TB Gold Test or T-SPOT®.TB Test)   
8. Tested positive for any of the following: HIV, HBs antigen, HBV DNA, HCV antibody, 
HTLV-1 antibody, or syphilis (Confirmed false positive syphilis test result is excluded)  
Withdrawal from the study will be considered if a subject skips 3 consecutive 
administrations. 
9.4 
Treatments 
9.4.1 
Treatments Administered 
Treatment Phase:  
E6011 400 mg, or placebo will be subcutaneously and repeatedly 
administered at Weeks 0, 1, 2 and every 2 weeks up to Week 10, and 
then E6011 200 mg or 400 mg will be subcutaneously and repeatedly 
administered every 2 weeks between Weeks 12 and 22 in a double-blind 
manner. 
Extension Phase:  
E6011 200 mg will be subcutaneously and repeatedly administered 
every 2 weeks between Weeks 24 and 102.  When subjects insufficiently 
respond to the treatment, repeated subcutaneous administration (400 mg 
of E6011 every 2 weeks) will be allowed. 
The study drug containing E6011 50 mg, 100 mg, or placebo in 1 vial (1 mL) will be used in 
the study.  In the Treatment Phase, 4 mL will be subcutaneously administered.  In the 
Extension Phase, 2 mL will be subcutaneously administered for the E6011 200 mg dosing 
and 4 mL will be administered for the E6011 400 mg dosing.  

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In the 2 mL administration, subjects will receive study drug subcutaneously in 2 separate 
sites, 1 mL each, from the following sites: right or left upper arm, right or left abdomen, or 
right or left thigh.  In the 4 mL administration, subjects will receive study drug 
subcutaneously in 4 separate sites, 1 mL each.  However, 2 mL of the study drug may be 
given subcutaneously in 1 site only if the investigator or subinvestigator judges that the study 
drug can be administered properly. 
The dose and administration method for the study drug is described in Table 1. 
Study drug will be administered upon completion of all the planned assessments (except for 
findings on injection sites) on the day.  On the first and second administrations of the study 
drug in Weeks 0 to 10 of the Treatment Phase and in Weeks 12 to 22 of the Treatment Phase 
(i.e., Weeks 0, 1, 12, and 14), subjects are required to stay at the site for at least 60 minutes 
after dosing to confirm its safety before being discharged. 

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Table 1 
Dose and Administration of the Study Drug 
Phase 
Dose 
Dosage Volume 
Dosage and Injection Site 
Treatment Phase: 
Weeks 0 to 10 
(Double-blind)  
400 mg 
or 
placebo 
4 mL 
(4 vialsb) 
Study drug will be given subcutaneously in 4 
separate sites, 1.0 mL each, among the 
following sites: right or left upper arm, right or 
left abdomen, or right or left thigh.   
(The study drug may be given subcutaneously in 
2 separate sites, 2 mL each, only if the 
investigator or subinvestigator judges that the 
study drug can be administered properly.) 
Treatment Phase: 
Weeks 12 to 22 
(Double-blind) 
200 mg 
or 
400 mg 
4 mL 
(4 vialsc) 
Study drug will be given subcutaneously in 4 
separate sites, 1.0 mL each, among the 
following sites: right or left upper arm, right or 
left abdomen, or right or left thigh. 
(The study drug may be given subcutaneously in 
2 separate sites, 2 mL each, only if the 
investigator or subinvestigator judges that the 
study drug can be administered properly.) 
Extension Phase: 
Weeks 24 to 102 
(Open label) 
200 mg 
2 mL 
(2 vialsd) 
Study drug will be given subcutaneously in 2 
separate sites, 1.0 mL each, among the 
following sites: right or left upper arm, right or 
left abdomen, or right or left thigh.  
(2 mL of the study drug may be given 
subcutaneously in 1 site only if the investigator 
or subinvestigator judges that the study drug can 
be administered properly.) 
400 mga 
4 mL 
(4 vialse) 
Study drug will be given subcutaneously in 4 
separate sites, 1.0 mL each, among the 
following sites: right or left upper arm, right or 
left abdomen, or right or left thigh.  
(The study drug may be given subcutaneously in 
2 separate sites, 2 mL each, only if the 
investigator or subinvestigator judges that the 
study drug can be administered properly.) 
a: When subjects insufficiently respond to the treatment, repeated subcutaneous administration (400 mg of 
E6011 every 2 weeks) will be allowed. 
b: 4×100 mg/mL vial for 400 mg administration and 4×0 mg/mL vial for placebo  
c: 4×100 mg/mL vial for 400 mg administration and 4×50 mg/mL vial for 200 mg administration 
d: 2×100 mg/mL vial for 200 mg administration 
e: 4×100 mg/mL vial for 400 mg administration 
 
9.4.2 
Identity of Investigational Products 
The study drugs for this study are provided in Table 2. 

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Study drugs will be packed as per the study design and provided by the sponsor.  Details of 
labeling and package of the study drugs are shown in Appendix 5. 
Table 2 
Study Drugs 
Study Drug 
Dosage Form and Strength 
E6011 
Aqueous solution containing 50 mg or 100 mg E6011 in a vial (1 mL) 
Placebo 
Aqueous solution containing no E6011 in a vial (1 mL) 
Storage Condition:  2 to 8 °C, protected from light. 
Manufacturer:  Eisai Co., Ltd. 
The study drugs for the Treatment Phase (double-blind) will be provided in small boxes 
packed in 3 large boxes, one containing small boxes for 4 administrations (Weeks 0 to 4), 
another containing small boxes for 3 administrations (Weeks 6 to 10), and the other 
containing small boxes for 6 administrations (Weeks 12 to 22).  
The study drugs for the Extension Phase (100 mg/1 mL vial) will be provided in boxes 
containing 10 vials each. 
9.4.2.1 
Chemical Name and Structural Formula of E6011 
• 
Test drug code:   
E6011 
• 
Generic name:   
To be determined 
• 
Chemical name:   
IgG2 
• 
Molecular weight:   147 kDa 
• 
Structural formula:  glycoprotein with immunoglobulin structure having 2 heavy chains 
(445 amino acids/chain) 
 
linked by disulfide bonds to 2 light chains (214 amino acids/chain) 
9.4.2.2 
Comparator Drug 
Placebo 
9.4.2.3 
Labeling for Study Drug 
The following information has to be provided: 
• 
Statement to the effect “For clinical study use only” 
• 
Name and address of the sponsor 
• 
Drug identifier 
• 
Chemical name or identification number 
• 
Manufacturing number or symbol 
• 
Storage conditions 

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9.4.2.4 
Storage Conditions 
Study drug will be stored in accordance with the specified storage conditions.  The study 
drug manager (or designee) will monitor the temperature at the storage location to ensure that 
the study drug is maintained within an established temperature range.  The study drug 
manager (or designee) is responsible for ensuring that the temperature is monitored 
throughout the study period and that records are maintained; the temperature should be 
monitored continuously by using an in-house validated data acquisition system, by using an 
automatic temperature recording device or by manual means, such that minimum and 
maximum thermometric values over a specific time period can be recorded and retrieved as 
required. 
9.4.3 
Method of Assigning Subjects to Treatment Groups 
Subjects will be randomly assigned to treatment groups through dynamic allocation 
algorithm that will be prepared by an independent enrollment center. 
After screening assessments are performed within 42 days before starting the study 
treatment, eligible subjects will be randomized to either of the 2 treatment groups at a 1:1 
ratio through dynamic allocation using the following factors: number of biologics with 
inadequate response, CRP level at the Screening Phase.   
Randomization will be performed centrally by an interactive web response system (IWRS).  
The person responsible for randomization will generate the list of randomized drug numbers.  
At screening, the investigator or designee will access the IWRS to register the subject 
information.  The independent enrollment center will confirm the eligibility of the subject, 
assign each subject to a treatment group by using dynamic allocation algorithm, and inform 
the drug number to the investigator or subinvestigator via email.  Upon completing all the 
planned assessments at the Observation Phase, the investigator or subinvestigator will 
prescribe the study drug for the eligible subject based on the drug number specified by the 
independent enrollment center.   
Subjects who will continue the study beyond Week 12 will be further allocated to E6011 
200 mg or 400 mg at a 1:1 ratio in the initially assigned group (E6011 or placebo group) 
through dynamic allocation using the following factors: number of biologics with inadequate 
response, CRP level at the Screening Phase.  
After a certain period of time, the independent enrollment center will assign the subject to a 
treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg 
groups) by using dynamic allocation algorithm and inform the drug number to the 
investigator or subinvestigator via email.  Upon completing all the planned assessments 
(except for findings on injection site) on Week 12, the investigator or subinvestigator will 
prescribe the study drug for the subject based on the drug number specified by the 
independent enrollment center.  

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9.4.4 
Selection of Doses in the Study 
In the Treatment Phase (12 weeks) of the Study 103, 21 of 37 subjects (56.8%) experienced 
adverse events (AEs).  AEs occurring in 2 or more subjects were injection site erythema, 
nasopharyngitis, headache, and oropharyngeal pain.  As a dose-dependent increase in the 
incidence of adverse reactions or occurrence of events to be concerned related to E6011 were 
not observed in Study 103, we consider that subcutaneous administration of E6011 is 
generally safe and tolerated in RA subjects at a dose up to 400 mg every 2 weeks.  Regarding 
the efficacy, although Study 103 was an open-label study without a placebo control, the 
clinical symptoms of RA tended to improve in all of the E6011 100 mg, 200 mg, and 400 mg 
groups in evaluations up to Week 12.  
The relationship between E6011 and its target membrane-bound FKN was investigated based 
on PK/PD analysis using serum E6011 and total FKN concentrations (sum of free FKN and 
E6011-FKN complex) in Study 001 and Study 002 was performed.  Based on the result, the 
share of membrane-bound FKN for E6011 at Week 12 was estimated to be 98.9% and 99.6% 
in the E6011 100 mg and 200 mg groups in Study 103, respectively.  It is reported that the 
share of membrane-bound FKN for biologics commercially available as RA drugs and given 
at clinically recommended dose was estimated to be approximately 99.5% (Tani K, et al, 
2013).  Sufficient share of membrane-bound FKN and improvement of clinical symptoms 
can be expected with E6011 200 mg; thus, we determined that the administration of 200 mg 
every 2 weeks is proper as a central dose.  In addition, earlier achievement of sufficient share 
of membrane-bound FKN and improvement of clinical symptoms are expected in the 400 mg 
group compared to the 200 mg group.    
The objective of this study is to explore the efficacy of E6011 in a small number of RA 
subjects with an inadequate response to biologics.  Therefore, E6011 400 mg, the dose 
expected for earlier achievement of sufficient share of membrane-bound FKN and 
improvement of clinical symptoms, is selected for the treatment until Week 12, the primary 
efficacy time point versus placebo.  The E6011-J081-201 study (hereinafter called Study 
201) has been planned in parallel with Study 202 to assess the dose response of E6011 in RA 
subjects inadequately responding to MTX.  The higher dose in Study 201 is E6011 400 mg 
administered by Week 10 and 200 mg thereafter.  To explore the efficacy and safety of 
E6011 in RA subjects with an inadequate response to biologics at the same dose level as in 
the higher dose group of Study 201, the double-blind part of Study 202 is continued until 
Week 24.  Since RA patients with an inadequate response to biologics generally have low 
response rates to second or later biologics (Emery, et al., 2008; Weinblatt, et al., 2012), 
subjects who are initially assigned to the 400 mg group will be re-allocated at a 1:1 ratio to 
the 400 mg/200 mg group (same dose level as in the higher dose group of Study 201) or the 
400 mg/400 mg group.  In the 400 mg/400 mg group, subjects will continue E6011 400 mg 
administrations every 2 weeks after Weeks 12.  Subjects who are initially assigned to the 
placebo group will be also re-allocated at a 1:1 ratio to the E6011 200 mg (placebo/200 mg 
group) or 400 mg (placebo/400 mg group) administrations every 2 weeks after Week 12.  
Since the primary endpoint of this study is ACR20 response rate at Week 12, the placebo 
group will be employed until Week 12 evaluations. 

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The central dose, every-2-week administrations of E6011 200 mg, is employed for 
maintaining improved symptoms during the Extension Phase.  When subjects insufficiently 
respond to the treatment or when their disease relapses in the Extension Phase (show no 
improvement from the Observation Phase in both of tender joint counts and swollen joint 
counts at 2 consecutive assessments), dose escalation will be allowed only once (6 
administrations of E6011 400 mg every 2 weeks).  The guidelines indicate that drug therapies 
for RA should be reviewed every 3 or 6 months, it is appropriate to set the period for 
administration of E6011 400 mg every 2 weeks to be 3 months (6 administrations). 
E6011 is to be administered at Weeks 0, 1, 2, and then, every 2 weeks because a loading 
administration 1 week after the first administration led to the prompt achievement of steady 
state in PK in Study 103. 
9.4.5 
Selection and Timing of Dose for Each Subject 
Please refer to Section 9.4.1 “Treatments Administered”. 
Study drugs can be administered regardless of the meal time.  Study drugs must be 
administered upon completion of all the planned assessments (except for findings on 
injection site) on the day. 
9.4.6 
Blinding 
During the double-blind part, subjects and all personnel involved in the conduct of study and 
evaluations, including investigators, subinvestigators, and clinical research associates 
(CRAs) will be blinded to the treatment codes.  Randomization data will be kept strictly 
confidential, filed securely by the sponsor or CRO and accessible only to authorized persons 
(e.g., Eisai Global Safety) until the time of unblinding, per standard operating procedures 
(SOP). 
Although the Extension Phase is an open-label part, each subject’s assigned treatment group 
will be blinded to subjects and any personnel involved in the conduct of study or evaluations, 
including investigators, subinvestigators, and CRAs until the database of the Treatment 
Phase is fixed. 
The bioanalytical laboratory and the immunogenicity assay laboratory will report the results 
to the sponsor after unblinding. 
• 
Key code and emergency key code 
After study drug randomization (and prior to delivering the assigned study drug to the site), 
the person responsible for randomization will immediately seal the key codes and keep them 
until unblinding.  The emergency key code will be prepared to assure the subjects’ safety.  
After study drug randomization (and prior to delivering the assigned study drug to the site), 
the person responsible for randomization will immediately seal the emergency key code for 
each subject (per drug number) and the emergency key code center will store them until 
unblinding.  Only in the case of a medical emergency where information about the assigned 
study drug is needed (including regulatory requirements) for appropriate treatments of the 

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subject or ensuring the subject’s safety, the emergency key code for the subject may be 
broken (opened). 
At unblinding, the person responsible for randomization will verify that all the emergency 
key codes are maintained for blinding, except those broken (opened) according to the 
prescribed procedure.  
• 
Sealing boxes of study drugs at collection by the sponsor 
The study drug manager (or designee) must check the number of all opened and unused study 
drugs and seal (stamp or sign) the opened box containing unused study drugs at collection by 
the sponsor. 
• 
Procedures for unblinding 
After database lock, the sponsor will ask the person responsible for randomization for 
unblinding, and the person responsible for randomization will break (open) the key code. 
9.4.7 
Prior and Concomitant Therapy 
Any medication (including over-the-counter medications) or therapy administered to the 
subject between the date of informed consent (12 weeks prior to the consent for DMARDs) 
and the follow-up assessments (28 days after discontinuation or completion of study) will be 
recorded in the CRF.  All prior biologics for RA will be recorded regardless of the timing of 
dosing.  The investigator or subinvestigator will record any concomitant medication/therapy 
associated with the occurrence of AEs in the CRF. However, medications, test agents, 
solvents or fluid infusions used as pretreatment for surgery, examination, or drug 
administration will not be considered concomitant drugs.   
For prior and concomitant medications indicated above, the name, administration route, dose 
(medications for RA and folic acid only [not for NSAIDs]), treatment start date (or timing of 
treatment initiation), treatment end date, reason for use, and reason for withdrawal (for 
biologics for RA only) will be recorded in the CRF.  For concomitant therapy, the name, 
treatment start date (or timing of treatment initiation) and treatment end date, and reason for 
concomitant use will be recorded in the CRF. 
9.4.7.1 
Prohibited Concomitant Therapies and Drugs 
9.4.7.1.1 PROHIBITED CONCOMITANT THERAPIES AND DRUGS 
The concomitant use of the following drugs or therapies is prohibited until completion of the 
Extension Phase (or until study discontinuation).  
• 
DMARDs (except MTX)  
• 
Biologics (adalimumab, infliximab, golimumab, certolizumab pegol, etanercept, 
tocilizumab, abatacept, etc.), including biosimilars  
• 
Intraarticular, intramuscular, or intravenous injection of corticosteroids 

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• 
Intraarticular injection of sodium hyaluronate (including sodium hyaluronate crosslinked 
polymer and sodium hyaluronate crosslinked polymer crosslinked with vinylsulfone) or 
intraarticular injection of local anesthetic agent 
• 
Arthrocentesis/drainage 
• 
Cytapheresis 
• 
Any analgesics other than NSAIDs (oral, suppository, or topical) 
• 
Cyclophosphamide, cyclosporine (with the exception of eye drops), azathioprine   
• 
Immunoglobulin preparations or blood products 
• 
Live vaccines 
• 
Activated form folic acid, over-the-counter medications containing folic acid as main 
component 
• 
Other investigational drugs or investigational devices  
• 
Surgical operations on arthritic disorder 
 
9.4.7.1.2 RESTRICTED CONCOMITANT THERAPIES AND DRUGS 
• 
MTX and folic acid should be used as a stable dose regimen up to completion of the 
Extension Phase (or until study discontinuation).  However, if an adverse event 
associated with MTX is noted, dose reduction or interruption is permitted. If the event 
disappears after dose reduction or interruption, the dose can be increased to the previous 
level. 
• 
Corticosteroids (equivalent to ≤10 mg/day of prednisolone, taken orally or by 
suppository) and herbal medicine indicated for RA are allowed under restricted 
conditions, but the dose regimen should not to be modified up to Week 24 (or until study 
discontinuation).  Between Weeks 24 and Week 104, the regimen should not be modified 
except for the following cases: dose reduction, dose interruption, dose increase following 
the dose reduction (up to the initial dose level), and restarting administration after 
interruption. 
• 
NSAIDs (oral, suppository, or topical) may be taken concomitantly but are prohibited 
between the night before the day of efficacy assessments and the end of the assessments. 
9.4.8 
Treatment Compliance 
The investigator, subinvestigator, or clinical research coordinator will record the time and 
status of study drug administrations in the CRF throughout the study period.  If a subject 
cannot complete the entire dose, the reason for incomplete dosing will be recorded in the 
CRF.  CRAs will review treatment compliance during site visits and at the completion of the 
study. 
9.4.9 
Drug Supplies and Accountability 
The study drug manager (or designee) will be responsible for the accountability of all study 
drugs (dispensing, inventory, and record keeping) following the instructions for handling of 

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study drugs provided by the sponsor and adherence to GCP guidelines as well as other 
regulatory requirements. 
Under no circumstances will the investigator or subinvestigator allow the study drugs to be 
used other than as directed by this protocol.  Study drugs will not be dispensed to any 
individual who is not enrolled in the study.   
The study drug manager (or designee) must keep accurate and timely records of the number 
of all study drugs received, the number of study drugs prescribed, the number of study 
prescribed to subject but not used (unused drug 1), the number of study drugs dispensed to 
investigational site but not prescribed to subject (unused drug 2) and the number of study 
drugs returned to the sponsor (total of unused drugs 1 and 2), and where applicable (if study 
drugs are discarded at the site).  This includes, but may not be limited to: (a) documentation 
of receipt of study drugs, (b) study drugs dispensing/return reconciliation log per subject, (c) 
drug accountability log, (d) documentation of returns to the sponsor, and (e) certificates of 
destruction for any destruction of study drugs that occurs at the site.   
The drug accountability log must be made available, upon request, for review by a CRA or 
inspection by a representative of a health authority.  The study drug manager (or designee) 
must check the quantity of all unused study drugs, exchange the study drug return form for 
the study drug recovery form with the sponsor, and return all unused study drugs to the 
sponsor. Unused study drugs that are to be returned from the site will be collected directly by 
CRA and will be returned to the sponsor’s depot(s). 
Drug accountability will be reviewed by CRA throughout the study period (during site visits, 
at the completion of the study, etc.). 
9.5 
Study Assessments 
9.5.1 
Assessments 
9.5.1.1 
Demography 
Demographic information of subjects will be collected during the Screening Phase.  
Demographic information includes date of birth, sex, and race/ethnicity.  In addition to these, 
subject identification code and date of obtaining written informed consent will be also 
documented in the CRF. 
9.5.1.2 
Assessments in the Screening and Observation Phases 
9.5.1.2.1 SMOKING HISTORY, MEDICAL HISTORY/COMPLICATIONS, AND PHYSICAL 
EXAMINATIONS 
Smoking history, medical history (including surgeries), and comorbidities will be assessed 
during the Screening Phase, and smoking history, surgical history of RA or comorbidities, 
and medical history concerning the exclusion criteria numbers 15, 16, 18, 20, and 26 will be 
recorded in the CRF.  

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Physical examinations will be performed at the time points specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4).  The results of the physical examination 
will be recorded in the medical chart at the site.  If changes in physical finding from 
screening that meet the definition of an AE, the AE will be recorded in the CRF. 
9.5.1.2.2 PRIOR MEDICATIONS 
For treatment drugs for RA and folic acid, all biologics for RA and medications other than 
biologics for RA administered after informed consent (12 weeks prior to the enrollment for 
DMARDs) should be recorded in the CRF, with the name, administration route, dose (only 
treatment drugs for RA and folic acid except for NSAIDs), treatment start date (or timing of 
treatment initiation), treatment end date, and reason for discontinuation (biologics for RA 
only) detailed. 
9.5.1.2.3 DISEASE CHARACTERISTICS OF RA 
• 
Time of Diagnosis 
• 
Classification of Functional Status in RA (ACR 1991 Revised Criteria) 
• 
Number of tender joints and number of swollen joints  
• 
CRP and ESR 
• 
RF or anticyclic citrullinated peptide (anti-CCP) antibody (positive/negative) 
9.5.1.2.4 OTHER ASSESSMENTS 
• 
Height and weight 
• 
Virus tests: HIV, HBs antigen, HBs antibody, HBc antibody, HBV-DNA, HCV antibody, 
and HTLV-1 antibody 
• 
Syphilis testing  
• 
Tuberculosis test (QuantiFERON® TB Gold Test or T-SPOT®.TB Test) 
Assays will be performed at the same laboratory where clinical laboratory tests are conducted 
(except for QuantiFERON® TB Gold Test or when T-SPOT®.TB Test is performed at the 
study institution), and test results will be recorded as a source document at the investigational 
site.  Samples will be handled according to the separately established procedures. 
9.5.1.3 
Efficacy Assessments 
9.5.1.3.1 ASSESSMENT OF TENDER AND SWOLLEN JOINT COUNTS 
The number of tender joints and the number of swollen joints will be evaluated during the 
Screening Phase, Observation Phase, Treatment Phase (Weeks 2, 4, 8, 12, 16, 20, and 24), 
Extension Phase (every 4 weeks up to Week 104), and at discontinuation.  As a general rule, 
assessments will be performed by the same investigator or subinvestigator at each site. 
A total of 68 joints will be examined for tenderness by applying pressure to the joint or by 
moving joints.  Tender joints will be marked with tick or cross in corresponding frames of 
the Assessment Sheet for Tender and Swollen Joint Counts (Appendix 7).  A total of 66 

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joints (minus 2 hip joints) will be examined for swollen joints.  Swollen joints will be marked 
with open circles in corresponding frames of the Assessment Sheet for Tender and Swollen 
Joint Counts (Appendix 7).  If assessment cannot be made because the subject had a joint 
replacement procedure, or due to any other reasons, a filled square will be entered. 
9.5.1.3.2 ASSESSMENT USING VISUAL ANALOG SCALE (VAS) 
Subjects will be evaluated using a visual analog scale (VAS) during the Observation Phase, 
Treatment Phase (Weeks 2, 4, 8, 12, 16, 20, and 24), Extension Phase (every 4 weeks up to 
Week 104), and at discontinuation.  As a general rule, assessments will be performed by the 
same investigator or subinvestigator at each site. 
For physician’s disease activity assessment, disease activity of the subject will be evaluated 
and the result will be entered by the physician on a score sheet, “Physician’s disease activity 
assessment form” (Appendix 8), by placing a mark on a 100 mm analog scale. 
For patient’s pain assessment, the degree of pain associated with RA will be indicated by the 
subject on a score sheet, “Patient’s pain/disease activity assessment form” (Appendix 9), by 
placing a mark on a 100 mm analog scale.   
For patient’s disease activity assessment, the degree of disease activity of RA will be 
indicated by the subject on a score sheet, “Patient’s pain/disease activity assessment form 
(Appendix 9), by placing a mark on a 100 mm analog scale. 
Patient’s pain/disease activity assessments (except for those at discontinuation) must be 
performed prior to any evaluations and tests by the investigator or subinvestigator at the time 
point, so that any influence on the subject’s evaluation can be avoided. 
The investigator, subinvestigator, or clinical research coordinator will read the scale on the 
assessment form and enter the result on the assessment form and the CRF. 
9.5.1.3.3 ASSESSMENT USING HEALTH ASSESSMENT QUESTIONNAIRE (HAQ) 
Subjects will be evaluated using the health assessment questionnaire (HAQ) during the 
Observation Phase, Treatment Phase (Weeks 2, 4, 8, 12, 16, 20, and 24), Extension Phase 
(every 4 weeks up to Week 104), and at discontinuation.  
Physical function will be self-evaluated by the subject using a Health assessment 
questionnaire (HAQ) (Appendix 10).  The assessment will be made based on the activities 
capable without any aids or devices.  The assessments (except for that at discontinuation) 
must be performed prior to any evaluations and tests by the investigator or subinvestigator at 
the time point, so that any influence on the subject’s evaluation can be avoided.  The 
investigator or subinvestigator will verify the report by the subject for its accuracy and 
consistency before releasing the subject.  The result of the completed HAQ will be 
documented in the CRF by the investigator, subinvestigator, or clinical research coordinator.  
This assessment is made based on the activities at each evaluation time point, and the results 
will not be compared with previous data. 

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9.5.1.3.4 ASSESSMENT OF ERYTHROCYTE SEDIMENTATION RATE (ESR) 
Erythrocyte sedimentation rate (ESR) of each subject will be measured during the Screening 
Phase, Observation Phase, Treatment Phase (Weeks 2, 4, 8, 12, 16, 20, and 24), Extension 
Phase (every 4 weeks up to Week 104), and at discontinuation, and the result will be 
recorded in the CRF. 
9.5.1.3.5 ASSESSMENT OF C-REACTIVE PROTEIN (CRP) 
CRP of each subject will be measured as part of blood biochemical tests during the Screening 
Phase, Observation Phase, Treatment Phase (Weeks 2, 4, 8, 12, 16, 20, and 24), Extension 
Phase (every 4 weeks up to Week 104), and at discontinuation.  
9.5.1.4 
Pharmacokinetic, Pharmacogenomic, Biomarker, and Immunogenicity 
Assessments 
9.5.1.4.1 PHARMACOKINETIC ASSESSMENTS 
Serum E6011 Concentration 
Blood samples will be collected for measuring serum E6011 concentrations at the time points 
specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4).  Serum 
E6011 concentrations will be measured at the bioanalytical laboratory using a validated, 
specific, and selective analytical method.  Planned blood volume for these measurements is 
provided in Table 5 (Section 9.5.2.2).  Samples will be handled according to the separately 
prescribed procedures. 
9.5.1.4.2 PHARMACOGENOMIC ASSESSMENTS 
Not Applicable. 
9.5.1.4.3 ASSESSMENTS OF BIOMARKERS 
Serum Total FKN Concentration 
Blood samples will be collected for measuring serum total FKN concentrations at the time 
points specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4).  
Planned blood volume for these measurements is provided in Table 5 (Section 9.5.2.2).  
Samples will be handled according to the separately prescribed procedures.  Measurements 
will be conducted at the biomarker assay laboratory. 
Serum Concentrations of RF, Anti-CCP, and MMP-3 
Blood samples will be collected for measuring serum concentrations of rheumatoid factor 
(RF), anticyclic citrullinated peptide (anti-CCP), and matrix metalloproteinase (MMP)-3 at 
the time point specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, 
Table 4).  Planned blood volume for these measurements is provided in Table 5 
(Section 9.5.2.2).  Samples will be handled according to the separately prescribed 
procedures.  Measurements will be conducted at the biomarker assay laboratory. 

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Serum Concentrations of Cytokines, LRG1, and Ang2 
Blood samples will be collected for measuring serum concentrations of cytokines 
(granulocyte macrophage colony-stimulating factor [GM-CSF], interferon-γ [IFN-γ], 
interleukin [IL]-1β, IL-6, TNFα, etc.), leucine-rich alpha-2 glycoprotein 1 (LRG1), and 
angiopoietin 2 (Ang2) at the time points specified in the Schedule of Procedures/Assessments 
(Section 9.5.2.1, Table 4).  Planned blood volume for these measurements is provided in 
Table 5 (Section 9.5.2.2).  Samples will be handled according to the separately prescribed 
procedures.  Measurements will be conducted at the biomarker assay laboratory. 
Serum TRACP-5b Concentration 
Blood samples will be collected for measuring serum concentrations of tartrate resistant acid 
phosphatase (TRACP)-5b at the time points specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4).  Planned blood volume for these 
measurements is provided in Table 5 (Section 9.5.2.2).  Samples will be handled according to 
the separately prescribed procedures.  Measurements will be conducted at the biomarker 
assay laboratory. 
Measurement of Immunocytes Such as Blood CX3CR1-positive Cells 
Blood samples will be collected for measuring immunocytes such as blood CX3CR1-positive 
cells at the time points specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, 
Table 4).  Planned blood volume for these measurements is provided in Table 5 
(Section 9.5.2.2).  Samples will be handled according to the separately prescribed 
procedures.  Measurements will be conducted at the biomarker assay laboratory.  
Vectra™ DA 
Blood samples will be collected for Vectra™ DA, assay kit for biomarkers including 
VCAM-1, epidermal growth factor [EGF], vascular endothelial growth factor [VEGF]-A, 
IL-6, tumor necrosis factor receptor-I [TNF-RI], MMP-1, MMP-3, YKL-40, leptin, resistin, 
serum amyloid A [SAA], and CRP at the time points specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4).  Planned blood volume for these 
measurements is provided in Table 5 (Section 9.5.2.2).  Samples will be handled according to 
the separately prescribed procedures.  Measurements will be conducted at the biomarker 
assay laboratory. 
9.5.1.4.4 IMMUNOGENICITY ASSESSMENTS 
Serum Anti-E6011 Antibody 
Blood samples will be collected for measuring of serum anti-E6011 antibodies at the time 
points specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4).  The 
presence or absence of serum anti-E6011 antibody will be assessed at the immunogenicity 
assay laboratory using a validated, specific, and selective analytical method.  When anti-
E6011 antibodies are observed, the neutralization activity and isotypes of the anti-E6011 
antibody will be evaluated.  Planned blood volume for these measurements is provided in 

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Table 5 (Section 9.5.2.2).  Samples will be handled according to the separately prescribed 
procedures. 
9.5.1.5 
Safety Assessments 
Safety assessments will consist of the followings, as specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4). 
All AEs observed; regular monitoring of clinical laboratory tests (including vasculitis marker 
tests), vital signs, chest x-ray, standard 12-lead electrocardiograms, physical findings, 
injection site findings, and neurological findings. 
9.5.1.5.1 ADVERSE EVENTS AND EVENTS ASSOCIATED WITH SPECIAL SITUATIONS 
An adverse event (AE) is any untoward medical occurrence in a patient or clinical 
investigation subject administered an investigational product.  An AE does not necessarily 
have a causal relationship with the medicinal product.  For this study, the study drugs are 
E6011 and placebo.  
The criteria for identifying AEs in this study are: 
• 
Any unfavorable and unintended sign (including an abnormal laboratory finding), 
symptom, or disease temporally associated with the use of an investigational product, 
whether or not considered related to the investigational product (Note:  Every sign or 
symptom should not be listed as a separate AE if the applicable disease [diagnosis] is 
being reported as an AE) 
• 
Any new disease or exacerbation of an existing disease 
• 
Any deterioration in nonprotocol-required measurements of a laboratory value or other 
clinical test (eg, ECG or x-ray) that results in symptoms, a change in treatment, or 
discontinuation of study drug 
• 
Recurrence of an intermittent medical condition (eg, headache) not present pretreatment 
(Baseline) 
• 
An abnormal laboratory test result should be considered an AE if the identified laboratory 
abnormality leads to any type of intervention, withdrawal of study drug, or withholding 
of study drug, whether prescribed in the protocol or not 
However, worsening of the primary disease (RA) is not considered an AE unless the 
symptom aggravated unexpectedly (slight change of RA condition is captured under efficacy 
assessments as disease progression rather than as an AE). 
It is the responsibility of the investigator to review all laboratory findings in all subjects and 
determine if they constitute an AE.   
All AEs observed during the study will be reported on the CRF.  All AEs, regardless of 
relationship to study drug or procedure, must be collected during the time the subject signed 
the informed consent and 70 days after the subject’s last dose.  Subjects who failed screening 
in Screening or Observation Phase primarily due to AE(s), such AE(s) and seriousness must 
be recorded in the CRF. 

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Any laboratory abnormality considered to constitute an AE will be reported on the CRF.  
Abnormal laboratory values are listed as separate AEs if they are considered to be part of the 
clinical syndrome that is being reported as an AE.  Medical and scientific judgment is 
exercised in deciding whether an isolated laboratory abnormality is classified as an AE. 
All AEs must be followed for 70 days after the subject’s last dose, or until resolution, 
whichever comes first.  However, all SAEs must be followed until resolution or, if resolution 
is unlikely, to stabilization.   
Every effort must be made by the investigator to categorize each AE according to its severity 
and its relationship to the study treatment. 
Assessing Severity of Adverse Events 
Adverse events will be graded on a 5-point scale according to Common Terminology Criteria 
for Adverse Event (CTCAE v4.0).  Investigators will report CTCAE grades for all AEs for 
increasing severity.   
As to ALP and γ-GTP, criteria for Grade 2 will be changed from ULN×2.5 (in the CTCAE) 
to ULN×3.0. 
Assessing Relationship to Study Treatment 
Items to be considered when assessing the relationship of an AE to the study treatment are: 
• 
Temporal relationship of the onset of the event to the initiation of the study treatment 
• 
The course of the event, especially the effect of discontinuation of study treatment or 
reintroduction of study treatment, as applicable 
• 
Whether the event is known to be associated with the study treatment or with other 
similar treatments 
• 
The presence of risk factors in the study subject known to increase the occurrence of the 
event 
• 
The presence of nonstudy, treatment-related factors that are known to be associated with 
the occurrence of the event 
Classification of Causality 
Not related 
A causal relationship between the study drug and the AE is not a 
reasonable possibility. 
Related 
A causal relationship between the study drug and the AE is a reasonable 
possibility. 
9.5.1.5.2 SERIOUS ADVERSE EVENTS AND EVENTS ASSOCIATED WITH SPECIAL SITUATIONS 
A serious adverse event (SAE) is any untoward medical occurrence that at any dose: 
• 
Results in death 

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• 
Is life-threatening (ie, the subject was at immediate risk of death from the adverse event 
as it occurred; this does not include an event that, had it occurred in a more severe form 
or was allowed to continue, might have caused death) 
• 
Requires inpatient hospitalization or prolongation of existing hospitalization 
• 
Results in persistent or significant disability/incapacity 
• 
Is a congenital anomaly/birth defect (in the child of a subject who was exposed to the 
study drug) 
Other important medical events that may not be immediately life-threatening or result in 
death or hospitalization but, when based on appropriate medical judgment, may jeopardize 
the subject or may require intervention to prevent one of the outcomes in the definition of 
SAE listed above should also be considered SAEs.  Medical and scientific judgment should 
be exercised in deciding whether expedited reporting is appropriate in such situations.  
In addition to the above, events associated with special situations include pregnancy or 
exposure to study drug through breastfeeding; AEs associated with study drug overdose, 
misuse, abuse, or medication error.  These events associated with special situations are to be 
captured using the SAE procedures (see Section 9.5.4.2 and Section 9.5.4.3) but are to be 
considered as SAEs only if they meet one of the above criteria.  All AEs associated with 
special situations are to be reported on the CRF whether or not they meet the criteria for 
SAEs.   
All SAEs must be followed to resolution or, if resolution is unlikely, to stabilization. 
The following hospitalizations are not considered to be SAEs because there is no “adverse 
event” (ie, there is no untoward medical occurrence) associated with the hospitalization: 
• 
Hospitalizations for respite care  
• 
Planned hospitalizations required by the protocol 
• 
Hospitalization planned before informed consent (where the condition requiring the 
hospitalization has not changed after study drug administration) 
• 
Hospitalization for administration of study drug or insertion of access for administration 
of study drug 
• 
Hospitalization for routine maintenance of a device (eg, battery replacement) that is in 
place before study drug administration 
9.5.1.5.3 LABORATORY MEASUREMENTS 
Clinical laboratory tests to be performed, including hematology, chemistry, and urinalysis, 
are summarized in Table 3).  The Schedule of Procedures/Assessments (Section 9.5.2.1, 
Table 4) shows the visits and time points at which blood for clinical laboratory tests and 
urine for urinalysis will be collected in the study. 
 

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Table 3 
Clinical Laboratory Tests 
Category 
Parameters 
Hematology 
WBC count, RBC count, hemoglobin, hematocrit, platelets, and 
differential of WBC (basophils, eosinophils, lymphocytes, 
monocytes, neutrophils) 
Blood chemistry 
 
 Liver function tests 
Total bilirubin, aspartate aminotransferase, alanine 
aminotransferase, alkaline phosphatase, gamma glutamyl 
transpeptidase  
 Renal function tests 
Blood urea nitrogen, creatinine 
 Other 
Glucose, HbA1c, albumin, total cholesterol, HDL cholesterol, LDL 
cholesterol, triglycerides, amylase, inorganic phosphorus, LDH, 
creatine kinase, total protein, uric acid, sodium, potassium, 
chloride, calcium, CRP, KL-6, β-D-glucan 
Urinalysis 
pH, protein, glucose, urobilinogen, ketones, occult blood, specific 
gravity, amylase 
Other 
 
 
Vasculitis marker 
Serum complement titer (CH50), soluble intercellular adhesion 
molecule (ICAM)-1, soluble vascular cell adhesion molecule 
(VCAM)-1, soluble E-selectin, thrombomodulin, D-dimer 
 
Autoantibody 
Antinuclear antibody, anti-DNA antibody 
CRP = C-reactive protein, HDL cholesterol = high-density lipoprotein cholesterol, LDH = lactate dehydrogenase, 
LDL cholesterol = low-density lipoprotein cholesterol, RBC = red blood cell, WBC = white blood cell 
A laboratory abnormality may meet the criteria to qualify as an AE as described in this 
protocol (see Section 9.5.1.5.1) and the CRF Completion Guidelines.  In these instances, the 
AE corresponding to the laboratory abnormality will be recorded in the CRF. 
9.5.1.5.4 VITAL SIGNS AND WEIGHT MEASUREMENTS 
Measurement of vital signs (i.e., systolic and diastolic blood pressure [mmHg], pulse [beats 
per minute], body temperature [in centigrade], and weight [kg)) will be performed at the 
visits specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4) by 
using prespecified methods and recorded in the CRF.  Blood pressure and pulse will be 
measured in the sitting or supine position after a rest for 5 minutes.  All blood pressure 
measurements should be performed on the same arm, and body temperature should be 
measured by axillary thermometer. 
If blood sampling is planned at the same timeframe and vital signs are measured after blood 
collection, measurement of vital signs must be carried out after sufficient time to avoid 
potential influence of blood collection on vital signs. 
9.5.1.5.5 PHYSICAL EXAMINATIONS 
Physical examinations will be performed at the visits specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4).  Physical examination results will be 

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recorded in the medical chart at the site.  Changes from screening physical examination 
findings that meet the definition of an AE will be recorded in the CRF. 
9.5.1.5.6 ELECTROCARDIOGRAMS 
Electrocardiograms (ECGs) will be obtained at the visits specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4).  Standard 12-lead ECG recordings will 
be used.  Subjects must be in the supine position for 5 minutes prior to the ECG.  The 
investigator or subinvestigator records the results (abnormal or normal) in the CRF.  If blood 
sampling is planned at the same timeframe and ECG is performed after blood collection, 
ECG must be carried out after sufficient time to avoid potential influence of blood collection 
on ECG. 
An ECG abnormality may meet the criteria of an AE as described in this protocol (see 
Section 9.5.1.5.1) and the CRF Completion Guidelines.  In these instances, the AE 
corresponding to the ECG abnormality will be recorded in the CRF. 
For ECG abnormalities meeting the criteria of an SAE (Section 9.5.1.5.2), the investigator 
must report the sponsor using the SAE form (with the ECG report) via fax, or other means of 
transmission (see ”Reporting of Serious Adverse Events”). 
9.5.1.5.7 OTHER SAFETY ASSESSMENTS 
Chest x-ray 
Chest x-rays (frontal view and lateral view) will be assessed at the time points specified in 
the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4).  The investigator or 
subinvestigator will determine whether findings are normal or abnormal, and record the 
results in the CRF.  For any abnormalities meeting the criteria of an AE as defined in this 
protocol (Section 9.5.1.5.1), they should be recorded as an AE in the CRF. 
When a subject who was previously ineligible for this study is enrolled after obtaining 
informed consent again, chest x-ray results which were assessed within 12 weeks before the 
start of study drug administration can be used as screening data, only if the chest x-ray was 
examined for the purpose of this study following the previous informed consent. 
Pregnancy test 
For female subjects of childbearing potential, blood test (quantitative, the central laboratory) 
will be performed at the Screening Phase, Weeks 12, 24, 52, 76, 104, and at discontinuation, 
and on-site test will be performed during the Observation Phase.  All the test results will be 
recorded in the medical chart at the site. 
Injection site findings 
Drug injection sites will be examined on each subject at the time points specified in the 
Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4).  The results will be recorded 

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in the medical chart at the site.  Any abnormal findings should be recorded as an AE in the 
CRF. 
Neurological findings 
Subjects will be examined for the presence or absence of neurological findings at the time 
points specified in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4), by 
using the Neurological finding checklist (see Appendix 11), and the results will be recorded 
in the CRF.  If any abnormal neurological findings are suspected anytime at the scheduled or 
unscheduled time points, the subject must be examined by using the Neurological finding 
checklist.  If any abnormal findings appear after administration of the study drug, the sponsor 
must be notified immediately using the Neurological finding report form (Appendix 12) sent 
by fax, etc. and the subject must be examined by a neurologist. Head MRI (T1-weighted 
image, FLAIR image and diffusion-weighted image) must be performed within 2 weeks and 
the copies of the images must be submitted to the sponsor. The sponsor must immediately 
transmit any pertinent information to the progressive multifocal leukoencephalopathy (PML) 
evaluation expert, who will advise on whether the treatment should be continued on the 
subject or not.  The study drug administration must be suspended until the evaluation by the 
PML evaluation expert is completed.  Such events should be recorded in the CRF as AEs. 
Blood CD4-positive cell counts 
Blood samples will be collected at the time points specified in the Schedule of 
Procedures/Assessments (Section 9.5.2.1, Table 4), to measure CD4-positive cell counts.  
Planned blood volume for these measurements is provided in Table 5 (Section 9.5.2.2). 
The clinical laboratory facility will report the results to the investigational site and the 
sponsor, and the results will be stored as source document at the site.  Samples will be 
handled according to the separately prescribed procedures. 
9.5.1.6 
Other Assessments 
Anti-JC virus antibody test 
Anti-JC virus (JCV) antibody test will be performed at the time points specified in the 
Schedule of Procedures/Assessments (Section 9.5.2.2, Table 4).  Samples will be handled 
according to the separately prescribed procedures. 
9.5.2 
Schedule of Procedures/Assessments 
9.5.2.1 
Study Schedule 
Table 4 presents the schedule of procedures/assessments for this study. 
Each assessment will be performed within 3 days before or after the scheduled date during 
Weeks 1 to 12 or within 7 days before or after the scheduled date after Week 14 using 
Week 0 as a reference point.  In the Follow-up Phase, each assessment will be performed 
within 7 days before or after the scheduled date (“within 7 days after the scheduled date” for 

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the assessment at “70 days after the last dosing”).  However, the interval between study 
treatments should be at least 3 days until 2 weeks after the start of study treatment, and at 
least 6 days after 4 weeks have elapsed since the start of study treatment. If any scheduled 
assessment or administration of the study drug cannot perform within the above period, each 
assessment will still be performed, but administration of the study drug will be skipped. 

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Table 4 
Schedule of Procedures/Assessments in Study E6011-J081-202 
Phase 
Screen 
-ing 
Obser 
-vation 
Treatment 
Time postdose
 
Assessment 
Day –42 
to 
Day –1 
W0 
W1 
W2 
W4 
W6 
W8 
W10 
W12 
Day 1 
Day 8 
±3 days 
Day 15 
±3 days 
Day 29 
±3 days 
Day 43 
±3 days 
Day 57 
±3 days 
Day 71 
±3 days 
Day 85 
±3 days 
pre 
Dosing 
 
 
 
 
 
 
 
Informed consent 
X 
 
 
 
 
 
 
 
 
 
Demographics, medical 
history, complication 
X 
 
 
 
 
 
 
 
 
 
Inclusion/exclusion criteria 
X 
X 
 
 
 
 
 
 
 
 
Study drug administration a 
 
 
X 
X 
X 
X 
X 
X 
X 
X 
Prior treatment / 
concomitant medication or 
therapy 
 
Vital signs 
X 
X 
 
X 
X 
X 
 
X 
 
X 
Height / body weightb 
 Xb 
 
 
 
 
 
 
 
 
X 
Physical findings, injection 
site findingc 
X 
X 
 
X 
X 
X 
 
X 
 
X 
Standard 12-lead ECG 
X 
 
 
 
 
 
 
 
X 
Chest x-ray 
X 
 
 
 
 
 
 
 
 
X 
Pregnancy testd 
X 
Xd 
 
 
 
 
 
 
 
X 
Neurological findingse 
X 
 
 
 
 
 
 
 
 
X 
Anti-JCV antibody test 
X 
 
 
 
 
 
 
 
 
 
Blood CD4-positive cells 
X 
 
 
 
 
 
 
 
 
X 
Viral test, syphilis test, TB 
test 
X 
 
 
 
 
 
 
 
 
 
Number of tender / 
swollen joints, ESR 
X 
X 
 
 
X 
X 
 
X 
 
X 
VAS, HAQ 
 
X 
 
 
X 
X 
 
X 
 
X 
Hematology, blood 
chemistry, urinalysis, RF, 
anti-CCP-Ab, MMP-3 
X 
X 
 
 
X 
X 
 
X 
 
X 
Autoantibody 
 
X 
 
 
 
 
 
 
 
X 
serum KL-6, β-D glucan  
X 
 
 
 
 
 
 
 
 
X 
Vasculitis marker tests 
 
X 
 
 
 
 
 
 
 
X 
Adverse events 
 
Serum E6011 
concentration 
 
X 
 
X 
X 
X 
 
X 
 
X 
Serum anti-E6011 antibody 
 
X 
 
 
 
X 
 
X 
 
X 
Serum total FKN 
 
X 
 
 
 
 
 
 
 
 
Serum cytokine 
concentration, LRG1, 
Ang2 
 
X 
 
 
 
X 
 
 
 
X 
Serum TRACP-5b 
concentration 
 
X 
 
 
 
 
 
 
 
X 
Immunocytes such as 
blood CX3CR1-positive 
cells 
 
X 
 
 
X 
X 
 
 
 
X 
Vectra™ DA 
 
X 
 
 
 
 
 
 
 
X 

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Table 4  Schedule of Procedures/Assessments in Study E6011-J081-202 
(continued) 
Phase 
Treatment 
               Time postdose
 
Assessment 
W14 
±7 days 
W16 
±7 days 
W18 
±7 days 
W20 
±7 days 
W22 
±7 days 
W24 
±7 days 
Informed consent 
 
 
 
 
 
 
Demographics, medical history, 
complication 
 
 
 
 
 
 
Inclusion/exclusion criteria 
 
 
 
 
 
 
Study drug administration a,f 
X 
X 
X 
X 
X 
Xg 
Prior treatment / concomitant 
medication or therapy 
 
Vital signs 
 
X 
 
X 
 
X 
Height / body weightb 
 
 
 
 
 
X 
Physical findings, injection site 
findingc 
 
 
 
 
 
X 
Standard 12-lead ECG 
 
 
 
 
 
X 
Chest x-ray 
 
 
 
 
 
X 
Pregnancy testd 
 
 
 
 
 
X 
Neurological findingse 
 
 
 
 
 
X 
Anti-JCV antibody test 
 
 
 
 
 
X 
Blood CD4-positive cells 
 
 
 
 
 
X 
Viral test, syphilis test, TB test 
 
 
 
 
 
 
Number of tender / swollen joints, ESR 
 
X 
 
X 
 
X 
VAS, HAQ 
 
X 
 
X 
 
X 
Hematology, blood chemistry, 
urinalysis, RF, anti-CCP-Ab, MMP-3 
 
X 
 
X 
 
X 
Autoantibody 
 
 
 
 
 
X 
serum KL-6, β-D glucan 
 
 
 
 
 
X 
Vasculitis marker tests 
 
 
 
 
 
X 
Adverse events 
 
Serum E6011 concentration 
 
X 
 
X 
 
X 
Serum anti-E6011 antibody 
 
X 
 
X 
 
X 
Serum total FKN 
 
 
 
 
 
 
Serum cytokine concentration, LRG1, 
Ang2 
 
 
 
 
 
X  
Serum TRACP-5b concentration 
 
 
 
 
 
X 
Immunocytes such as blood CX3CR1-
positive cells 
 
 
 
 
 
X 
Vectra™ DA 
 
 
 
 
 
X 
 

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Table 4  Schedule of Procedures/Assessments in Study E6011-J081-202 
(continued) 
Phase 
Extension 
          Time postdose
 
Assessment 
W26 
±7 
days 
W28 
±7 
days 
W30 
±7 
days 
W32 
±7 
days 
W34 
±7 
days 
W36 
±7 
days 
W38 
±7 
days 
W40 
±7 
days 
W42 
±7 
days 
W44 
±7 
days 
W46 
±7 
days 
W48 
±7 
days 
W50 
±7 
days 
W52 
±7 
days 
Informed consent 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Demographics, medical 
history, complication 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Inclusion/exclusion criteria 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Study drug administration a,f 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Prior treatment / concomitant 
medication or therapy 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vital signs 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
Height / body weightb 
 
 
 
 
 
X 
 
 
 
 
 
 
 
Xb 
Physical findings, injection 
site findingc 
 
 
 
 
 
X 
 
 
 
 
 
 
 
X 
Standard 12-lead ECG 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Chest x-ray 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Pregnancy testd 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Neurological findings e 
 
 
 
 
 
X 
 
 
 
 
 
 
 
X 
Anti-JCV antibody test 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Blood CD4-positive cells 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Viral test, syphilis test, TB 
test 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Number of tender / swollen 
joints, ESR 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
VAS, HAQ 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
Hematology, blood 
chemistry, urinalysis, RF, 
anti-CCP-Ab, MMP-3 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
Autoantibody 
 
 
 
 
 
X 
 
 
 
 
 
 
 
X 
serum KL-6, β-D glucan 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Vasculitis marker tests 
 
 
 
 
 
X 
 
 
 
 
 
 
 
X 
Adverse events 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Serum E6011 concentration 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
Serum anti-E6011 antibody 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
Serum total FKN 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Serum cytokine 
concentration, LRG1, Ang2 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Serum TRACP-5b 
concentration 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Immunocytes such as blood 
CX3CR1-positive cells 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
Vectra™ DA 
 
 
 
 
 
 
 
 
 
 
 
 
 
X 
 

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Table 4  Schedule of Procedures/Assessments in Study E6011-J081-202 
(continued) 
Phase 
Extension 
Treatment/
Extension 
Follow-up 
               Time postdose 
 
Assessment 
W52+2nh 
±7 days 
W52+4ni 
±7 days 
W64 
W88 
±7 days 
W76 
±7 days 
W100 
±7 days 
W104 
±7 days 
Discont. 
28 days after 
completion or 
discontinuation
70 days after 
 last dosing 
Informed consent 
 
 
 
 
 
 
 
 
 
Demographics, medical history, 
complication 
 
 
 
 
 
 
 
 
 
Inclusion/exclusion criteria 
 
 
 
 
 
 
 
 
 
Study drug administration a,f 
X 
X 
X 
X 
X 
 
 
 
 
Prior treatment / concomitant 
medication or therapy 
 
 
Vital signs 
 
X 
X 
X 
X 
X 
X 
X 
 
Height / body weightb 
 
 
 
 
 
X 
X 
X 
 
Physical findings, injection site 
findingc 
 
 
X 
X 
 
X 
X 
X 
 
Standard 12-lead ECG 
 
 
 
X 
 
X 
X 
 
 
Chest x-ray 
 
 
 
X 
 
X 
X 
 
 
Pregnancy testd 
 
 
 
X 
 
X 
X 
 
 
Neurological findingse 
 
 
X 
X 
 
X 
X 
 
 
Anti-JCV antibody test 
 
 
 
X 
 
X 
X 
 
 
Blood CD4-positive cells 
 
 
 
X 
 
X 
X 
 
 
Viral test, syphilis test, TB test 
 
 
 
 
 
X 
X 
 
 
Number of tender / swollen 
joints, ESR 
 
X 
X 
X 
X 
X 
X 
 
 
VAS, HAQ 
 
X 
X 
X 
X 
X 
X 
 
 
Hematology, blood chemistry, 
urinalysis, RF, anti-CCP-Ab, 
MMP-3 
 
X 
X 
X 
X 
X 
X 
X 
 
Autoantibody 
 
 
 
 
 
X 
X 
 
 
serum KL-6, β-D glucan 
 
 
 
 
 
X 
X 
 
 
Vasculitis marker tests 
 
 
X 
X 
 
X 
X 
 
 
Adverse events 
 
Serum E6011 concentration 
 
X 
X 
X 
X 
X 
X 
 
 
Serum anti-E6011 antibody 
 
X 
X 
X 
X 
X 
X 
 
 
Serum total FKN 
 
 
 
 
 
 
 
 
 
Serum cytokine concentration, 
LRG1, Ang2 
 
 
 
 
 
X 
X 
 
 
Serum TRACP-5b concentration 
 
 
 
 
 
X 
X 
 
 
Immunocytes such as blood 
CX3CR1-positive cells 
 
 
 
 
 
 
Xj 
 
 
Vectra™ DA 
 
 
 
 
 
X 
X 
 
 

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Phase 
Extension 
Treatment/
Extension 
Follow-up 
               Time postdose 
 
Assessment 
W52+2nh 
±7 days 
W52+4ni 
±7 days 
W64 
W88 
±7 days 
W76 
±7 days 
W100 
±7 days 
W104 
±7 days 
Discont. 
28 days after 
completion or 
discontinuation
70 days after 
 last dosing 
a. Study drug will be administered upon completion of all the planned investigations (except for injection site findings) on the 
day. 
b. To measure height only at the Screening Phase and W52. 
c. To examine injection site findings after study drug administration. 
d. To perform pregnancy test in women of childbearing potential. On-site test conducted at the Observation Phase only. 
e. If any postdose abnormality is observed in neurological examination, head MRI (T1-weighted image, FLAIR image, 
diffusion-weighted image) will be performed within 2 weeks along with consultation to a neurologist. 
f. The interval between study treatments is at least 7 days (at least 6 days between treatments) 
g. Administration of study drug at Week 24 is done in an open-label manner. 
h. W52+2n: W54,58,62,66,70,74,78,82,86,90,94,98,102 
i. W52+4n: W56,60,68,72,80,84,92,96 
j. Basically performed at study discontinuation, and a missing value is permissible only when collection of the sample is 
difficult due to abrupt discontinuation 
9.5.2.2 
Volume of Blood Samples 
Table 5 shows the frequency of blood samplings and volume of blood samples obtained 
throughout the study period. If any deviation from reference range or any finding for which 
the investigator or subinvestigator considers it necessary to confirm the subject’s safety, the 
required volume of blood samples may increase from the specified volumes tabulated below.  

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Table 5 
Volume of Blood Samples 
Test item 
Volume per 
sampling 
Screening 
Phase 
Observation
Phase 
Treatment 
Phase 
Extension 
Phase 
Follow-up 
Phase 
Days –42 
to –1 
Predose of 
Day 1 
Weeks 1  
to 24 
Weeks 26 
to 104 
Viral test, syphilis test, TB test 
26 mL 
once 
 
 
twice 
 
Erythrocyte sedimentation rate 
2 mL 
once 
once 
7 times 
20 times 
 
Hematology 
2 mL 
once 
once 
7 times 
20 times 
once 
Blood chemistry 
10 mL 
once 
once 
7 times 
20 times 
once 
Pregnancy test 
(once)a 
 
(twice)a 
(3 times)a 
 
Serum KL-6 
(once)a 
 
(twice)a 
(twice)a 
 
Anti-JCV antibody test 
3 mL 
once 
 
once 
3 times 
 
Blood CD4-positive cells 
2 mL 
once 
 
twice 
3 times 
 
RF, anti-CCP antibody, MMP-3 
4 mL 
once 
once 
7 times 
20 times 
once 
Autoantibody 
3 mL 
 
once 
twice 
3 times 
 
Serum TRACP-5b concentration 
 
(once)a 
(twice)a 
(twice)a 
 
β-D glucan 
3 mL 
once 
 
twice 
twice 
 
Vasculitis marker tests 
5.8 mL 
 
once 
twice 
6 times 
 
Serum E6011 concentration 
2 or 5 mL 
 
onceb 
8 timesb 
20 timesb 
 
Serum anti-E6011 antibody 
 
onceb 
6 timesb 
20 timesb 
 
Serum total FKN 
 
(once)a 
 
 
 
Serum cytokine concentration, 
serum LRG1, and Ang2 
5 mL 
 
once 
3 times 
twice 
 
Vectra™ DA 
 
(once)a 
(twice)a 
(twice)a 
 
Immunocytes such as blood  
CX3CR1-positive cells 
5 mL 
 
once 
4 times 
once 
 
Total volume of blood samples 
Each Phase 
52.0 mL 
41.8 mL 
225.6 mL 
591.8 mL 
16 mL 
Screening to Week 24 
319.4 mL 
 
Screening to Week 104 
911.2 mL 
 
Screening to the Follow-up Phase 
927.2 mL 
a:  Blood collections for these items (inside the brackets) are included in those for the items just above. 
b:  The volume of blood sample is 5 mL at the time point for assessing both serum E6011 concentration and 
serum anti-E6011 antibody and 2 mL at the time point for assessing serum E6011 concentration only. 
 
9.5.3 
Appropriateness of Measurements 
Efficacy endpoints of this study are set as follows: 

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ACR20 response rate, ACR50 response rate, ACR70 response rate, DAS 28-ESR, DAS28-
CRP, HAQ, simple disease activity index (SDAI), clinical disease activity index (CDAI), and 
Boolean remission rate 
According to “The Guideline for the clinical evaluation of antirheumatic drugs”, it is 
recommended that the improvement in ACR20 be set as a primary endpoint and the 
improvement in ACR50 and ACR70 as secondary ones.  Therefore, we consider it 
appropriate to set ACR20 response rate, which is a world standard, as the primary endpoint.  
In addition, evaluation on DAS28 and comprehensive approaches with stricter measures than 
ACR20, such as ACR50, ACR70, SDAI, CDAI, and remission criteria are required, given 
the recent progress of RA diagnosis and treatment system. 
The safety assessments to be performed in this study, including hematology, blood 
chemistry, urinalysis, and assessment of AEs, are standard evaluations to ensure subject 
safety.  Potential risks of vasculitis and PML are set as important safety evaluation items, and 
the following assessments will be conducted. 
1. Potential risk of vasculitis 
It is expected that E6011 acts on FKN, which is strongly expressed in vascular endothelial 
cells in inflammatory diseases.  Although there have been no findings suggestive of vasculitis 
in nonclinical or clinical studies reported so far, vasculitis markers will be measured in this 
study to investigate the potential risk of vasculitis. 
2. Potential risk of PML 
PML has been recognized as a potential rare complication in patients with multiple sclerosis 
or Crohn’s disease being treated with natalizumab (humanized anti-α4-integrin monoclonal 
antibody) (FDA Drug Safety Communication).  The pathogenesis of PML remains unclear; 
however, it is believed that α4-integrin might be involved.  Although there have been no 
findings suggestive of PML in clinical studies reported so far, the mechanism of action of 
E6011 is to neutralize FKN, and reports that α4-integrin activity is intensified by interaction 
between FKN and CX3CR1 (Goda S, et al., 2000) suggest that an indirect effect of E6011 on 
α4-integrin cannot be entirely ruled out.  Considering the potential risk of PML, subjects with 
blood CD4-positive cell count <200 /μL or white blood cell count <3,000 μL or subjects with 
neurological findings will be excluded in this study.  Periodic neurological examinations will 
be conducted during the study, and PML evaluation expert will be appointed for enabling 
investigators to obtain advice on diagnosis and treatment of PML; in case neurological 
findings are observed after starting the study drug administration, the subject must receive a 
medical examination by a neurologist, have a head MRI examination within 2 weeks, and 
interrupt the study drug administrations until completion of the evaluation by the PML 
expert.  In addition, after the completion or discontinuation of the study, follow-up 
investigations on event of PML or death by phone or other means will be planned in every 6 
months for 2 years from the last dose of the study drug.  The pathogenesis of PML is not 
completely understood; however, it is believed that latent JCV being reactivated due to 
reduced cellular immunity results in nerve damage (Practice Guideline of Progressive 
Multifocal Leukoencephalopathy); therefore, anti-JCV antibody will be assayed and the data 
will be collected in this study. 

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9.5.4 
Reporting of Serious Adverse Events, Pregnancy, and Events Associated 
with Special Situations 
9.5.4.1 
Reporting of Serious Adverse Events 
All serious adverse events (SAEs), regardless of their relationship to study treatment, must be 
reported by the investigator to the sponsor as soon as possible but no later than 1 business 
day from the date the investigator becomes aware of the event.  In addition, the investigator 
must report to the sponsor on a completed SAE form as soon as possible. 
Serious adverse events, regardless of causality assessment, must be collected through the 
study and for 70 days after the subject’s last dose.  All SAEs must be followed to resolution 
or, if resolution is unlikely, to stabilization.  Any SAE judged by the investigator to be 
related to the study treatment or any protocol-required procedure should be reported to the 
sponsor regardless of the length of time that has passed since study completion. 
Contact information of urgent safety issues is provided in Appendix 2. 
It is very important that the SAE report form be filled out as completely as possible at the 
time of the initial report.  This includes the investigator’s assessment of causality. 
Any follow-up information received on SAEs should be forwarded within 1 business day of 
its receipt.  If the follow-up information changes the investigator’s assessment of causality, 
this should also be noted on the follow-up SAE form. 
Preliminary SAE reports should be followed as soon as possible by detailed descriptions 
including copies of hospital case reports, autopsy reports, and other documents requested by 
the sponsor. 
9.5.4.2 
Reporting of Pregnancy and Exposure to Study Drug Through Breastfeeding 
Any pregnancy in which the estimated date of conception is either before the last visit or 
within 70 days of last study treatment, or any exposure to study drug through breastfeeding 
during study treatment or within 70 days of last study treatment, must be reported. 
If an adverse outcome of a pregnancy is suspected to be related to study drug exposure, this 
should be reported regardless of the length of time that has passed since the exposure to study 
treatment. 
A congenital anomaly, death during perinatal period, an induced abortion, or a spontaneous 
abortion are considered to be an SAE and should be reported in the same time frame and in 
the same format as all other SAEs (see Section 9.5.4.1”Reporting of Serious Adverse 
Events”). 
Pregnancies or exposure to study drug through breastfeeding must be reported by fax or 
email as soon as possible but no later than 1 business day from the date the investigator 
becomes aware of the pregnancy.  The contact information for the reporting of pregnancies 
and exposure to study drug through breastfeeding is provided in Section 9.5.4.1.  The 

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pregnancy report form (Appendix 13) must be used for reporting.  All pregnancies must be 
followed to outcome.  The outcome of the pregnancy must be reported by the pregnancy 
outcome report form (Appendix 14) as soon as possible but no later than 1 business day from 
the date the investigator becomes aware of the outcome. 
A subject who becomes pregnant must be withdrawn from the study.  
9.5.4.3 
Reporting of Events Associated with Special Situations 
9.5.4.3.1 REPORTING OF ADVERSE EVENTS ASSOCIATED WITH STUDY DRUG OVERDOSE, 
MISUSE, ABUSE, OR MEDICATION ERROR 
Adverse events associated with study drug overdose, misuse, abuse, and medication error 
refer to AEs associated with uses of the study drug outside of that specified by the protocol.  
Overdose, misuse, abuse, and medication error are defined as follows:  
Overdose 
Accidental or intentional use of the study drug in an amount higher 
than the protocol-defined dose. 
Misuse 
Intentional and inappropriate use of study drug not in accordance with 
the protocol 
Abuse 
Sporadic or persistent intentional excessive use of study drug 
accompanied by harmful physical or psychological effects 
Medication error 
Any unintentional event that causes or leads to inappropriate study 
drug use or subject harm while the study drug is in the control of site 
personnel or the subject.  
All AEs associated with overdose, misuse, abuse, or medication error should be captured on 
the Adverse Event CRF and also reported using the procedures detailed in Reporting of 
Serious Adverse Events (Section 9.5.4.1) even if the AEs do not meet serious criteria.  Abuse 
is always to be captured as an AE.  If the AE associated with an overdose, misuse, abuse, or 
medication error does not meet serious criteria, it must still be reported using the SAE form 
and in an expedited manner but should be noted as nonserious on the SAE form and the 
Adverse Event CRF. 
9.5.4.4 
Expedited Reporting 
The sponsor must inform investigators and the head of the medical institution and regulatory 
authorities of reportable events, in compliance with applicable regulatory requirements, on an 
expedited basis.  For this reason, it is imperative that sites provide complete SAE information 
in the manner described above (see Section 9.5.4.1”Reporting of Serious Adverse Events”). 
9.5.4.5 
Breaking the Blind 
In the case of a medical emergency where the appropriate treatment of the subject requires 
knowledge of the study treatment given, the investigator may break the randomization code 
for an individual subject.  In all such cases, the AE necessitating the emergency blind break 

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will be handled as an SAE in accordance with the procedures indicated above (see 
Section 9.5.4.1”Reporting of Serious Adverse Events”).  Any broken code will be clearly 
justified and documented.  The sponsor must be notified immediately of the blind break. 
Procedures for emergency blind break are as follows.  
Procedures for emergency blind break 
1. The investigator or the sponsor will request the emergency code center to break the 
subject’s emergency unblinding code. 
2. The emergency code center will obtain the necessary information (investigational site 
/department, name of person requesting blind break, drug number, study title, and the 
person to contact when returning the information) from the person requesting code 
breaking (the investigator or the sponsor). 
3. If unblinding is judged appropriate, the emergency code center will unblinding the 
emergency code for the subject and promptly inform the result to the person to contact 
(the investigator or the sponsor). 
4. When the unblinding request is made by an investigator, the emergency code center will 
promptly notify the sponsor of the necessary information obtained by the investigator and 
the result of unblinding.  
5. When the unblinding request is made by the sponsor, the sponsor will notify the 
investigator of the reason, course, and result of the unblinding.  
Contact information of the emergency code center is provided in Appendix 2. 
9.5.4.6 
Regulatory Reporting of Adverse Events 
Adverse events will be reported to regulatory authorities in compliance with local law and 
established guidance.  The format of these reports will be dictated by the local requirements. 
9.5.5 
Completion/Discontinuation of Subjects 
A subject may elect to discontinue the study at any time for any reason.  All subjects who 
discontinue the study are to complete the study’s early discontinuation procedures indicated 
in the Schedule of Procedures/Assessments (Section 9.5.2.1, Table 4). 
The investigator will promptly explain to the subject involved that the study will be 
discontinued for that subject and provide appropriate medical treatment and other necessary 
measures for the subject.  A subject who has ceased to return for visits will be followed up by 
mail, phone, or other means to gather information such as the reason for failure to return, the 
status of treatment compliance, the presence or absence of AEs, and clinical courses of signs 
and symptoms.   
Subjects who discontinue early from the study will be discontinued for 1 of these primary 
reasons: AE(s), lost to follow-up, subject choice, inadequate therapeutic effect, progression 
of disease, withdrawal of consent, pregnancy, study terminated by sponsor, or other.  In 

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addition to the primary reason, the subject may indicate 1 or more secondary reason(s) for 
discontinuation.  Study disposition information will be collected on the CRF. 
9.5.6 
Abuse or Diversion of Study Drug 
Not applicable. 
9.5.7 
Confirmation of Medical Care by Another Physician 
The investigator, subinvestigator, or clinical research coordinator will instruct subjects to 
inform site personnel when they are planning to receive medical care by another physician.  
At each visit, the investigator or clinical research coordinator will ask the subject whether 
he/she has received medical care by another physician since the last visit or is planning to do 
so in the future.  When the subject is going to receive medical care by another physician, the 
investigator or subinvestigator, with the consent of the subject, will inform the other 
physician that the subject is participating in the clinical study. 
9.6 
Data Quality Assurance 
This study will be organized, performed, and reported in compliance with the protocol, 
SOPs, working practice documents, and applicable regulations and guidelines.   
9.6.1 
Data Collection 
Data required by the protocol will be collected on the CRFs and entered into a validated data 
management system that is compliant with all regulatory requirements.  As defined by GCP, 
the CRF is a printed, optical, or electronic document designed to record all of the protocol-
required information to be reported to the sponsor on each study subject. 
Data collection on the CRF must follow the instructions described in the CRF Completion 
Guidelines.  The investigator has ultimate responsibility for the collection and reporting of all 
clinical data entered on the CRF.  The investigator must sign the completed CRF to attest to 
its accuracy, authenticity, and completeness. 
Completed, original CRFs are the sole property of Eisai and should not be made available in 
any form to third parties without written permission from Eisai, except for authorized 
representatives of Eisai or appropriate regulatory authorities. 
9.6.2 
Clinical Data Management 
All software applications used in the collection of data will be properly validated following 
standard computer system validation that is compliant with all regulatory requirements.  All 
data, both CRF and external data (eg, laboratory data), will be entered into a clinical system. 
9.7 
Statistical Methods 
Statistical analyses will be performed by using SAS or other validated statistical software as 
needed after unblinding. In this study, the statistical analysis in the Treatment Phase will be 

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performed after the database in the Treatment Phase is locked and the data is unblinded, and 
then final analysis will be performed by using all data after the database throughout the study 
period is locked.  The details will be described in the Statistical Analysis Plan (SAP). SAP 
for the Treatment Phase and the entire study (the Treatment Phase and Extension Phase) will 
be finalized before each database lock. 
9.7.1 
Statistical and Analytical Plans 
The statistical analyses of study data are described in this section.  Analyses in the Treatment 
Phase are mainly described in the following sections to Section 9.7.1.8, while analyses in the 
Extension Phase are described in Section 9.7.1.9. 
9.7.1.1 
Study Endpoints 
9.7.1.1.1 PRIMARY ENDPOINT 
• 
ACR20 response rate at Week 12 
ACR20 response rate: A subject is defined as ACR20 responder if all of the following 3 
criteria are met, and ACR 20 response rate refers to the percentage of subjects with ACR20 
response: 
1. Greater than or equal to 20% reduction from baseline in the tender joint counts (out of 68 
joints) 
2. Greater than or equal to 20% reduction from baseline in the swollen joint counts (out of 
66 joints) 
3. Greater than or equal to 20% reduction from baseline in at least 3 of the following 
5 assessments: 
- 
Physician’s disease activity assessment 
- 
Patient’s disease activity assessment 
- 
Patient’s Pain assessment 
- 
HAQ 
- 
CRP 
9.7.1.1.2 SECONDARY ENDPOINTS 
• 
ACR20, ACR50, and ACR70 response rates at each evaluation time point (excluding 
ACR20 response rate at Week 12) 
• 
Values and change from baseline in ACR components (number of tender joints, number 
of swollen joints, VAS [Patient’s pain assessments/disease activity global assessments 
and Physician’s disease activity global assessment], Patient’s physical function 
assessment [HAQ], and CRP/ESR), DAS28-ESR, DAS28-CRP, SDAI, and CDAI at each 
evaluation time point 
• 
EULAR response criteria and disease activity classification based on DAS28-ESR or 
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• 
Remission rate calculated based on each remission criterion (DAS28-ESR, DAS28-CRP, 
SDAI, CDAI, and Boolean) at each evaluation time point 
 
The ACR50 response rate is defined similarly to the ACR20 response rate, except for a 50% 
reduction as threshold. 
The ACR70 response rate is defined similarly to the ACR20 response rate, except for a 70% 
reduction as threshold. 
DAS28-CRP: This will be calculated on the following formula, and disease activity is 
categorized as High at >4.1, Moderate at >2.7 and ≤4.1, Low at ≤2.7, and Remission at <2.3. 
0.56×√[Number of tender joints (28 joints)]+0.28×√[Number of swollen joints (28 
joints)]+0.36×log{CRP×10+1}+0.014×Patient’s disease activity assessments + 0.96 
DAS28-ESR: This will be calculated on the following formula, and disease activity is 
categorized as High at >5.1, Moderate at >3.2 and ≤5.1, Low at ≤3.2, and Remission at <2.6. 
0.56×√[Number of tender joints (28 joints)]+ 0.28×√[ Number of swollen joints (28 
joints)]+0.70×1n (ESR)+0.014×Patient’s disease activity assessments 
EULAR Response Criteria: 
Present DAS28 
DAS28 reduction from baseline 
<–1.2 
≥–1.2 and <–0.6 
≥–0.6 
(missing included) 
Low 
Good response 
Moderate response 
No response 
Moderate 
Moderate response 
Moderate response 
No response 
High 
Moderate response 
No response 
No response 
 
CDAI: This will be calculated on the following formula, and disease activity is categorized 
as  
High at >22, Moderate at >10 and ≤22, Low at ≤10, and Remission at ≤2.8. 
Number of swollen joints (28 joints) + Number of tender joints (28 joints) 
+ Patient’s disease activity assessments/10 
+ Physician’s disease activity assessment/10 
SDAI: This will be calculated on the following formula, and disease activity is categorized as  
High at >26, Moderate at >11 and ≤26, Low at ≤11, and Remission at ≤3.3. 
Number of swollen joints (28 joints) + Number of tender joints (28 joints) 
+ Patient’s disease activity assessments/10 
+ Physician’s disease activity assessment/10+CRP 
Boolean remission: A subject is judged to have Boolean remission if all of the following 
conditions are satisfied: 

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1. Tender joint counts (out of 68 joints) ≤1 
2. Swollen joint counts (out of 66 joints) ≤1 
3. CRP ≤1 
4. Patient’s disease activity assessments ≤10 
9.7.1.2 
Definitions of Analysis Sets 
The Full Analysis Set (FAS) is the group of randomized subjects who received the study 
drug and had at least 1 evaluable postdose primary efficacy measurement. 
The Per Protocol Analysis Set (PPS) is the group of subjects who sufficiently complied with 
the protocol.  Details of the PPS criteria will be determined before database lock and 
unblinding and will be specified in the Statistical Analysis Plan.  
The Safety Analysis Set is the group of subjects who received the study drug and had at least 
1 evaluable postdose safety assessment. 
9.7.1.3 
Subject Disposition 
The number of subjects who provided signed informed consent, and who failed screening 
along with the reason for such screen failures will be summarized. The number of 
randomized subjects, subjects who are treated/not treated (after randomization), 
completed/discontinued the study, and the reason for the discontinuation will be summarized 
for each treatment group and the overall subjects.  
9.7.1.4 
Demographic and Other Baseline Characteristics 
Demographic and other baseline characteristics for the Safety Analysis Set and FAS will be 
summarized for each treatment group and the overall subjects.  Continuous variables include 
age, RA duration; categorical variables include sex, race, etc. 
9.7.1.5 
Prior and Concomitant Therapy 
All investigator terms for medications recorded in the CRF will be coded to an 11-digit code 
using the World Health Organization Drug Dictionary (WHO DD).  The number 
(percentage) of subjects who took prior and concomitant medications will be summarized by 
using the FAS by treatment group, with summarization also being done by Anatomical 
Therapeutic Chemical (ATC) class (if relevant ATC classes such as anatomical class, 
therapeutic class, pharmacologic class and chemical class apply), and WHO DD preferred 
term.  Prior medications will be defined as medications that stopped before the first dose of 
study drug.  Concomitant medications will be defined as medications that (1) started before 
the date of the first dose of study drug and were still administered at the date of the first dose 
of study drug, or (2) started during the study treatment period.  All prior and concomitant 
medications will be presented in subject data listings. 

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9.7.1.6 
Efficacy Analyses 
The FAS will be used as the primary population for the efficacy analyses, while the PPS will 
be used as a supportive population for the efficacy analyses. 
9.7.1.6.1 PRIMARY EFFICACY ANALYSIS 
ACR20 response rate at Week 12 will be analyzed using a logistic regression model with the 
number of biologics with inadequate response and CRP level at the Screening Phase as 
covariates, for the comparison between placebo and E6011.  Significance level is α=0.025 
(one-sided). Subjects with missing primary efficacy endpoint due to early discontinuation or 
other reasons will be considered nonresponders. In case that the number of subjects in each 
category of covariates is very small, integration of the categories will be planned.  ACR20 
response rate and its 2-sided 95% confidence interval for each treatment group will be 
calculated. The difference in ACR20 response rate between E6011 and placebo and its 2-
sided 95% confidence interval will also be calculated. 
9.7.1.6.2 SECONDARY EFFICACY ANALYSES 
Analyses for Weeks 0 to 12 of the Treatment Phase  
For ACR20 (excluding Week 12), ACR50 and ACR70 response rates at each evaluation time 
point, similar analyses to primary analyses will be conducted. 
For each component of ACR (number of tender joints, number of swollen joints, VAS 
[patient’s pain assessment and patient’s disease activity global assessment, and physician’s 
disease activity global assessment], patient’s physical function assessment [HAQ] and 
CRP/ESR), DAS28-ESR, DAS28-CRP, SDAI and CDAI in each evaluation time point, 
summary statistics (mean, standard deviation, median, and range) for the values and the 
changes from baseline will be calculated by treatment group (E6011 and placebo groups) and 
evaluation time point.  The changes from baseline will also be analyzed using ANCOVA 
with baseline value, number of biologics with inadequate response, and CRP level at the 
Screening Phase as covariates.  The significance level for comparisons between placebo and 
E6011 is α=0.05 (2-sided). 
For EULAR response classification and disease activity classification based on DAS28-ESR 
and DAS28-CRP, shift tables will be created by treatment group and evaluation time point.   
For remission rates calculated based on remission criteria (DAS28-ESR, DAS28-CRP, 
SDAI, CDAI, and Boolean), similar analyses to primary analyses will be conducted. 
Analyses for the entire Treatment Phase 
Summary statistics for each efficacy endpoint will be calculated by treatment group 
(placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups) and 
evaluation time point.  In addition, summary statistics for each efficacy endpoint will be 
calculated by evaluation time point using values at Week 12 as baseline. 

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9.7.1.7 
Pharmacokinetic, Pharmacodynamic, Pharmacogenomic, and Other Biomarker 
Analyses 
9.7.1.7.1 PHARMACOKINETIC AND PHARMACODYNAMIC ANALYSES 
Analyses for Weeks 0 to 12 of the Treatment Phase  
Summary statistics for serum E6011 concentrations will be calculated by specified time 
point.  Serum E6011 concentration-time profiles will be plotted.   
Analyses for the entire Treatment Phase 
Summary statistics for serum E6011 concentrations will be calculated by treatment group 
(placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups) and 
specified time point.  Serum E6011 concentration-time profiles will be plotted.   
Population pharmacokinetic analyses will be conducted.  Data from other studies will be 
integrated as necessary.  Serum E6011 concentration data will be used to build PK models.  
The models may be used to explore the relationship between PK and covariates.  The 
relationship between serum E6011 concentrations and biomarkers and/or efficacy will also 
be investigated through population PK/PD modeling.  For population PK analyses, the details 
will be described in the separately prepared analysis plan and its report, and the results will 
not be included in the clinical study report. 
9.7.1.7.2 PHARMACOGENOMIC, BIOMARKER, AND IMMUNOGENICITY ANALYSES 
Pharmacogenomic Analyses 
Not applicable. 
Biomarker Analyses 
Analyses for Weeks 0 to 12 of the Treatment Phase  
Summary statistics for serum RF concentration, serum anti-CCP antibody concentration, and 
serum MMP-3 concentration, serum TRACP-5b concentration, serum cytokine 
concentration, serum LRG1 concentration, serum Ang2 concentration, Vectra™ DA and its 
component (VCAM-1, EGF, VEGF-A, IL-6, TNF-RI, MMP-1, MMP-3, YKL-40, leptin, 
resistin, SAA, and CRP) value, change from baseline and percent change from baseline, by 
treatment group (E6011 and placebo groups) and evaluation time point, will be calculated.   
Analyses for the entire Treatment Phase 
Summary statistics for each biomarker will be calculated by treatment group 
(placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 400 mg/400 mg groups) and 
evaluation time point.  In addition, summary statistics for each biomarker will be calculated 
by evaluation time point using values at Week 12 as baseline. 
Exploratory investigations of the relationship between efficacy and biomarkers will be 
conducted.  Details and results of analyses of immunocytes such as blood CX3CR1-positive 

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cells will be provided in a separate report, and will not be included in the clinical study 
report. 
Immunogenicity Analyses 
All immunogenicity analyses will be performed using the Safety Analysis Set.   
Analyses for Weeks 0 to 12 of the Treatment Phase  
The percentage and frequency of occurrences will be calculated for serum anti-E6011 
antibodies by treatment group (E6011 and placebo groups) and evaluation time point.  If anti-
E6011 antibody develops, the frequency and percentage of presence or absence of anti-
E6011 antibody neutralization activity and isotypes will be calculated. 
Analyses for the entire Treatment Phase 
Similar analyses to those described for Weeks 0 to 12 of the Treatment Phase will be 
conducted by treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 
400 mg/400 mg groups). 
In addition, similar analyses will be conducted for Weeks 12 onwards (after starting 
administration of E6011) using values at Week 12 as baseline. 
9.7.1.8 
Safety Analyses 
All safety analyses will be performed on the Safety Analysis Set.  Safety variables include 
AEs, clinical laboratory parameters, vital signs, standard 12-lead ECG results, chest x-ray, 
neurological findings, and blood CD4-positive cell count.  Day 1 for all safety analyses will 
be defined as the date of the first dose of study drug.  
Analyses for Weeks 0 to 12 of the Treatment Phase  
Summary statistics for safety data, presented by treatment group (E6011 and placebo 
groups), will be calculated on an “as treated” basis (e.g., n, mean, standard deviation, median, 
minimum, maximum for continuous variables; n and percentage for categorical variables).   
Analyses for the entire Treatment Phase 
Similar analyses to those described for Weeks 0 to 12 of the Treatment Phase will be 
conducted by treatment group (placebo/200 mg, placebo/400 mg, 400 mg/200 mg, and 
400 mg/400 mg groups).  In addition, similar analyses will be conducted for Weeks 12 
onwards (after starting administration of E6011) using values at Week 12 as baseline. 
9.7.1.8.1 EXTENT OF EXPOSURE 
The duration of exposure to study drug will be characterized by treatment group using 
summary statistics. 

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9.7.1.8.2 ADVERSE EVENTS 
The AE verbatim descriptions (investigator terms from the CRF) will be classified into 
standardized medical terminology using the Medical Dictionary for Regulatory Activities 
(MedDRA). Adverse events will be coded to the MedDRA (Version 19.0 or higher) lower 
level term (LLT) closest to the verbatim term.  The linked MedDRA preferred term (PT) and 
primary system organ class (SOC) are also captured in the database. 
A treatment-emergent adverse event (TEAE) is defined as an AE that emerges during 
treatment, having been absent at pretreatment (Baseline) or  
• 
Reemerges during treatment, having been present at pretreatment (Baseline) but stopped 
before treatment, or  
• 
Worsens in severity during treatment relative to the pretreatment state, when the AE is 
continuous. 
Only those AEs that are treatment-emergent will be included in summary tables.  All AEs, 
treatment-emergent or otherwise, will be presented in subject data listings. 
The TEAEs will be summarized by treatment group.  The incidence of TEAEs will be 
reported as the number (percentage) of subjects with TEAEs by SOC and PT.  A subject will 
be counted only once within an SOC and PT, even if the subject experienced more than 1 
TEAE within a specific SOC and PT.  The number (percentage) of subjects with TEAEs will 
also be summarized by highest CTCAE grade. 
The number (percentage) of subjects with TEAEs will also be summarized by relationship to 
study drug (Yes [related] and No [not related]).  
The number (percentage) of subjects with treatment-related TEAEs will be summarized by 
SOC and PT.  Treatment-related TEAEs include those events considered by the investigator 
to be related to study treatment.  The number (percentage) of subjects with treatment-related 
TEAEs will also be summarized by highest CTCAE grade. 
9.7.1.8.3 LABORATORY VALUES 
Laboratory results will be summarized using Système International (SI) units.  For 
continuous variables, summary statistics for the actual value and the change from baseline 
will be summarized by visit.   
For ordinal and categorical variables, laboratory test results will be assigned a 
low/normal/high (LNH) classification according to whether the value was below (L), within 
(N), or above (H) the laboratory parameter’s reference range. The number (percentage) of 
subjects by LNH will be summarized on shift tables (the baseline vs. each postbaseline visit) 
by treatment group.  Similar shift tables will also compare the baseline LNH classification to 
the LNH classification for the highest and lowest value after starting the study drug 
administration. 

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9.7.1.8.4 VITAL SIGNS 
Summary statistics for values and changes from baseline of vital sign parameters (i.e., 
systolic and diastolic BP, pulse, temperature, and weight) and changes from baseline will be 
calculated by evaluation time point and treatment group. 
9.7.1.8.5 ELECTROCARDIOGRAMS 
The number and percentages of subjects with normal/abnormal findings in 12-lead ECG will 
be summarized on shift tables by treatment group. 
9.7.1.8.6 OTHER SAFETY ANALYSES 
Chest x-ray 
The number and percentages of subjects with normal/abnormal findings in chest x-ray will be 
summarized on shift-tables by treatment group. 
Neurological findings  
The number and percentages of subjects with normal/abnormal findings in neurological 
examination will be summarized on shift-tables by treatment group. 
Blood CD4-positive cell counts 
For Blood CD4-positive cell counts, summary statistics for the actual value and the change 
from baseline will be calculated by evaluation time point and treatment group.  Blood CD4-
positive cell counts will be assigned a low/normal/high (LNH) classification according to 
whether the value was below (L), within (N), or above (H) the reference range, and 
summarized on shift tables by treatment group.   
9.7.1.9 
Extension Phase Analyses 
Similar analyses to those for the entire Treatment Phase will be conducted for efficacy, 
pharmacokinetics (except for population PK and PK/PD analyses), biomarker, 
immunogenicity, and safety endpoints by treatment group (placebo/200 mg, placebo/400 mg, 
400 mg/200 mg, and 400 mg/400 mg groups). 
9.7.2 
Determination of Sample Size 
Since the objectives for the study are to explore the efficacy and safety of E6011 repeated 
subcutaneous administration at Weeks 0, 1, 2, and every 2 weeks until Week 10 at 400 mg, 
then E6011 200 mg or 400 mg every 2 weeks between Weeks 12 and 22, and every 2 weeks 
afterwards at 200 mg in RA subjects inadequately responding to biologics, neither clinical 
hypotheses nor judgement criteria are set, and the sample size calculation is not based on 
statistical considerations.   

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However, the sample sizes of 30 for each treatment group will have about 80% power to 
detect a difference in response rate of 35% if ACR20 response rate for placebo is 20% to 
25% at Week 12 based on a chi-square test. 
9.7.3 
Interim Analysis 
No interim analysis is planned for this study. 
9.7.4 
Other Statistical/Analytical Issues 
Not applicable. 
9.7.5 
Procedure for Revising the Statistical Analysis Plan 
If the SAP needs to be revised after the study starts, the sponsor will determine how the 
revision impacts the study and how the revision should be implemented.  The details of the 
revision will be documented and described in the clinical study report. 
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evidence of clinical and radiographic benefit from an x ray reader-blinded randomised 
controlled trial of tocilizumab. Ann Rheum Dis. 2007;66(9):1162–7 
Ochi T, Yamamoto K, Ryu J. Diagnosis and Treatment Guidelines for Rheumatoid Arthritis 
based on EBM (revised) 2004 [in Japanese]. Japan Rheumatism Foundation. 
Research group of Prion disease and slow virus infection, Ministry of Health, Labour and 
Welfare Sciences Research Grant, Research Committee on Epidemiology of Intractable 
Diseases. “Clinical Guideline 2013:Progressive Multifocal Leukoencephalopathy (PML)”. 
Singh JA, Saag KG, Bridges SL Jr, Akl EA, Bannuru RR, Sullivan MC, et al. 2015 American 
College of Rheumatology Guideline for the Treatment of Rheumatoid Arthritis. Arthritis 
Rheumatol. 2016 Jan;68(1):1-26. 
Takeuchi T. Rheumatoid arthritis: progress in diagnosis and treatment, Differential diagnosis 
of arthritis [in Japanese]. Nihon Naika Gakkai Zasshi. 2010:99;2392–400. 
Takeuchi T, Yamanaka H, Ishiguro N, Miyasaka N, Mukai M, Matsubara T, et al. 
Adalimumab, a human anti-TNF monoclonal antibody, outcome study for the prevention of 
joint damage in Japanese patients with early rheumatoid arthritis: the HOPEFUL 1 study. 
Ann Rheum Dis. 2014; 73(3):536-43 
Tanaka Y. Paradigm shift of diagnosis and treatment of rheumatoid arthritis [in Japanese]. 
Nihon Naika Gakkai Zasshi. 2011:100;1978–86.  
Tani K, Takayanagi R, Yokoyama H, Yamada Y. Theoretical analysis of efficacy of 
biological agent for rheumatoid arthritis based on target molecular binding occupancy: 
Rheumatol Int. 2013:33(7);1791-5 
Weinblatt ME, Fleischmann R, Huizinga TW, Emery P, Pope J, Massarotti EM, et al. 
Efficacy and safety of certolizumab pegol in a broad population of patients with active 

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rheumatoid arthritis: results from the REALISTIC phase IIIb study. Rheumatology (Oxford). 
2012;51(12):2204-14 

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11 PROCEDURES AND INSTRUCTIONS (ADMINISTRATIVE 
PROCEDURES) 
11.1 Changes to the Protocol 
Any change to the protocol requires a written protocol amendment or administrative change 
that must be approved by the sponsor before implementation.   
Amendments specifically affecting the safety of subjects, the scope of the investigation, or 
the scientific quality of the study require additional approval by the applicable IRBs.  These 
requirements should in no way prevent any immediate action from being taken by the 
investigator, or by the sponsor, in the interest of preserving the safety of all subjects included 
in the study.  If the investigator determines that an immediate change to or deviation from the 
protocol is necessary for safety reasons to eliminate an immediate hazard to the subjects, the 
sponsor and the IRB for the site must be notified immediately.  The sponsor must notify the 
regulatory authority as required per local regulations. 
Protocol amendments that affect only administrative aspects of the study may not require 
submission to health or regulatory authority or the IRB.  In these cases, the sponsor may be 
required to send a letter to the IRB and the Competent Authorities detailing such changes. 
11.2 Adherence to the Protocol 
The investigators and subinvestigators will conduct the study in strict accordance with the 
protocol. 
11.3 Monitoring Procedures 
The sponsor’s/CRO’s CRA will maintain contact with the investigator and designated staff 
by telephone, letter, or email between study visits.  Monitoring visits to each site will be 
conducted by the assigned CRA as described in the monitoring plan.  The investigator will 
allow the CRA to inspect the clinical, laboratory, and pharmacy facilities to assure 
compliance with GCP and local regulatory requirements.  The CRFs and subject’s 
corresponding original medical records (source documents) are to be fully available for 
review by the sponsor’s representatives at regular intervals.  These reviews verify adherence 
to study protocol and data accuracy in accordance with local regulations.  All records at the 
site are subject to inspection by the local auditing agency and to IRB review. 
In accordance with the GCP, source documents include, but are not limited to, the following: 
• 
Clinic, office, or hospital charts 
• 
Copies or transcribed health care provider notes that have been certified for accuracy 
after production 
• 
Recorded data from automated instruments such as IVRS/IWRS, x-rays, and other 
imaging reports (eg, sonograms, CT scans, magnetic resonance images, radioactive 
images, ECGs, rhythm strips, EEGs, polysomnographs, pulmonary function tests) 

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regardless of how these images are stored, including microfiche and photographic 
negatives 
• 
Pain, quality of life, or medical history questionnaires completed by subjects 
• 
Records of telephone contacts 
• 
Diaries or evaluation checklists 
• 
Drug distribution and accountability logs maintained in pharmacies or by research 
personnel 
• 
Laboratory results and other laboratory test outputs (eg, urine pregnancy test result 
documentation and urine dip-sticks) 
• 
Correspondence regarding a study subject’s treatment between physicians or memoranda 
sent to the IRBs 
• 
CRF components (eg, questionnaires) that are completed directly by subjects and serve as 
their own source 
11.4 Recording of Data 
A CRF is required and must be completed for each subject by qualified and authorized 
personnel.  All data on the CRF must reflect the corresponding source document, except 
when a section of the CRF itself is used as the source document.  Any correction to entries 
made on the CRF must be documented in a valid audit trail where the correction is dated, the 
individual making the correct is identified, the reason for the change is stated, and the 
original data are not obscured.  Only data required by the protocol for the purposes of the 
study should be collected. 
The investigator must sign each CRF.  The investigator will report the CRFs to the sponsor 
and retain a copy of the CRFs. 
11.5 Identification of Source Data 
All data to be recorded in the CRF must reflect the corresponding source documents.  For the 
following items, the data recorded directly in the CRF are to be considered source data: 
• 
Status of study treatment (eg, reasons for discontinuation of study treatment, reasons of 
the dose change) 
• 
Reason for providing prior/concomitant therapy (including nonpharmacotherapies) 
• 
Information on study discontinuation (eg, no visit to an investigational site) 
• 
Information on AE (eg, severity, causal relationship to the study drug, outcome) 
11.6 Retention of Records 
The circumstances of completion or termination of the study notwithstanding, the head of the 
medical institution is responsible for retaining all study documents, including but not limited 
to the protocol, copies of CRFs, the Investigator's Brochure, and regulatory agency 
registration documents (eg, ICFs, and IRB correspondence).  In addition, the sponsor will 
send a list of treatment codes by study subject to the investigator after the clinical database 

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for this study has been locked.  The site should plan to retain study documents, as directed by 
the sponsor, for at least 2 years after the last approval of a marketing application in an ICH 
region and until there are no pending or contemplated marketing applications in an ICH 
region or at least 3 years have elapsed since the formal discontinuation of clinical 
development of the investigational product.  As this investigational product is expected to be 
designated as a biological product, the site must preserve name and address of a subject, date 
of drug administration, and lot number for at least 10 years after the last drug administration 
to identify individuals. 
It is requested that at the completion of the required retention period, the site contact the 
sponsor, allowing the sponsor the option of permanently retaining the study records. 
11.7 Auditing Procedures and Inspection 
In addition to routine monitoring procedures, the sponsor’s Clinical Quality Assurance 
department conducts audits of clinical research activities in accordance with the sponsor’s 
SOPs to evaluate compliance with the principles of GCP and all applicable local regulations.   
11.8 Handling of Study Drug 
All study drug will be supplied to the investigator (or a designated pharmacist/or designee) 
by the sponsor.  Drug supplies must be kept in an appropriate secure area (eg, locked cabinet) 
and stored according to the conditions specified on the drug labels.  The investigator (or a 
designated pharmacist/or designee) must maintain an accurate record of the shipment and 
dispensing of the study drug in a drug accountability ledger, a copy of which must be given 
to the sponsor at the end of the study.  An accurate record of the date and amount of study 
drug dispensed to each subject must be available for inspection at any time.  The CRA will 
visit the site and review these documents along with all other study conduct documents at 
appropriate intervals once study drug has been received by the site. 
All drug supplies are to be used only for this study and not for any other purpose.  The 
investigator (or site personnel) must not destroy any drug labels or any partly used or unused 
drug supply before approval to do so by the sponsor.  At the conclusion of the study and as 
appropriate during the study, the investigator (or a designated pharmacist/or designee) will 
return all unused drug and a copy of the completed drug disposition form (if requested) to the 
sponsor. 
11.9 Publication of Results 
All manuscripts, abstracts, or other modes of presentation arising from the results of the 
study must be reviewed and approved in writing by the sponsor in advance of submission 
pursuant.  The review is aimed at protecting the sponsor's proprietary information existing 
either at the date of the commencement of the study or generated during the study. 
The detailed obligations regarding the publication of any data, material results, or other 
information generated or created in relation to the study shall be set out in the agreement 
between the head of the medical institution and the sponsor. 

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11.10 Disclosure and Confidentiality 
The contents of this protocol and any amendments and results obtained during the study 
should be kept confidential by the investigator, the subinvestigator, the clinical research 
coordinator, and the IRB and will not be disclosed in whole or in part to others, or used for 
any purpose other than reviewing or performing the study, without the written consent of the 
sponsor.  No data collected as part of this study will be used in any written work, including 
publications, without the written consent of the sponsor.  These obligations of confidentiality 
and non-use shall in no way diminish such obligations as set forth in either the 
Confidentiality Agreement or Clinical Trial Agreement executed between the head of the 
medical institution and the sponsor. 
All persons assisting in the performance of this study must be bound by the obligations of 
confidentiality and non-use set forth in either the Confidentiality Agreement or Clinical Trial 
Agreement executed between the head of the medical institution and the sponsor. 
11.11 Discontinuation of Study 
The sponsor reserves the right to discontinue the study for medical reasons or any other 
reason at any time.  If a study is prematurely terminated or suspended, the sponsor will 
promptly inform the investigators, heads of the medical institutions, and regulatory 
authorities of the termination or suspension and the reason(s) for the termination or 
suspension.  The IRB will also be informed promptly and provided the reason(s) for the 
termination or suspension by the sponsor or by the investigator/institution, as specified by the 
applicable regulatory requirement(s). 
The investigator reserves the right to discontinue the study should his/her judgment so 
dictate.  If the investigator terminates or suspends a study without prior agreement of the 
sponsor, the investigator should inform the head of the medical institution where applicable, 
and the investigator/ the head of the medical institution should promptly inform the sponsor 
and the IRB and provide the sponsor and the IRB with a detailed written explanation of the 
termination or suspension.  Study records must be retained as noted above. 
If no subjects are enrolled in an investigational site for 3 months or more from the initiation 
of the recruits at the site, discontinuation of contract with the site will be considered. 
11.12 Subject Insurance and Indemnity 
The sponsor will provide insurance for any subjects participating in the study in accordance 
with all applicable laws and regulations. 

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12 APPENDICES 
Appendix 1 
Investigational sites and investigators 
Appendix 2 
Study administrative structure 
Appendix 3 
ACR 1987 revised criteria for the classification of rheumatoid arthritis, and 
the 2010 ACR/EULAR classification criteria for rheumatoid arthritis 
Appendix 4 
Classification of functional capacity in rheumatoid arthritis (ACR 1991 
revised criteria) 
Appendix 5 
Identification, package, and labeling of investigational products 
Appendix 6 
List of prohibited/restricted concomitant drugs 
Appendix 7 
Assessment sheet for tender and swollen joint counts (sample) 
Appendix 8 
Physician’s disease activity assessment form (sample) 
Appendix 9 
Patient’s pain/disease activity assessments form (Sample) 
Appendix 10 
Health assessment questionnaire (Sample) 
Appendix 11 
Neurological finding checklist 
Appendix 12 
Neurological finding report form 
Appendix 13 
The pregnancy report form 
Appendix 14 
The pregnancy outcome report form 
Appendix 15 
Information on unauthorized medical devices (blood collection tube, etc.) in 
Japan 
 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2016/10/13 
 
1 
Overview of Protocol Amendment between Ver. 1 and Ver. 2 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics  
(The parts of change: underline) 
Protocol body 
Pertinent page 
Before Amendment (Ver.1, August 31, 2016) 
After Amendment (Ver. 2, October 13, 2016) 
Reason for Amendment 
P39, 9.5.1.5.7 OTHER 
SAFETY 
ASSESSMENTS 
Pregnancy test 
 
For female subjects of childbearing 
potential, blood test (quantitative, the 
central laboratory) will be performed at 
the Screening Phase, Weeks 12, 24, 52, 
76, 104, and at discontinuation, and 
urinalysis test (qualitative, on-site) will 
be performed during the Observation 
Phase. All the test results will be 
recorded in the medical charts at the 
site. 
For female subjects of childbearing potential, blood test 
(quantitative, the central laboratory) will be performed 
at the Screening Phase, Weeks 12, 24, 52, 76, 104, and 
at discontinuation, and on-site test will be performed 
during the Observation Phase. All the test results will be 
recorded in the medical charts at the site. 
For on-site pregnancy 
test during the 
Observation Phase, 
either urine tests 
(qualitative) or blood 
tests (quantitative) can 
be performed. 
P44, 9.5.2.2 Table 5 
Volume of Blood 
Samples 
See below. 
The volume of blood 
samples for anti-JCV 
antibody was changed 
(decreased). 
correction 

E6011-J081-202 
 
 
 
 
 
 
Creation: 2016/10/13 
 
2 
(Before) Table 1 
Volume of Blood Samples 
Test item 
Volume per 
sampling 
Screening 
Phase 
Observation
Phase 
Treatment 
Phase 
Extension 
Phase 
Follow-up 
Phase 
Days –42 
to –1 
Predose of 
Day 1 
Weeks 1  
to 24 
Weeks 26 
to 104 
Viral test, syphilis test, TB test 
26 mL 
once 
 
 
twice 
 
Erythrocyte sedimentation rate 
2 mL 
once 
once 
7 times 
20 times 
 
Hematology 
2 mL 
once 
once 
7 times 
20 times 
once 
Blood chemistry 
10 mL 
once 
once 
7 times 
20 times 
once 
Pregnancy test 
(once)a 
(once)a 
(twice)a 
(3 times)a 
 
Serum KL-6 
(once)a 
 
(twice)a 
(twice)a 
 
Anti-JCV antibody test 
3.5 mL 
once 
 
once 
3 times 
 
Blood CD4-positive cells 
2 mL 
once 
 
twice 
3 times 
 
RF, anti-CCP antibody, MMP-3 
4 mL 
once 
once 
7 times 
20 times 
once 
Autoantibody 
3 mL 
 
once 
twice 
3 times 
 
Serum TRACP-5b concentration 
 
(once)a 
(twice)a 
(twice)a 
 
β-D glucan 
3 mL 
once 
 
twice 
twice 
 
Vasculitis marker tests 
5.8 mL 
 
once 
twice 
6 times 
 
Serum E6011 concentration 
2 or 5 mL 
 
onceb 
8 timesb 
20 timesb 
 
Serum anti-E6011 antibody 
 
onceb 
6 timesb 
20 timesb 
 
Serum total FKN 
 
(once)a 
 
 
 
Serum cytokine concentration, 
serum LRG1, and Ang2 
5 mL 
 
once 
3 times 
twice 
 
Vectra™ DA 
 
(once)a 
(twice)a 
(twice)a 
 
Immunocytes such as blood  
CX3CR1-positive cells 
5 mL 
 
once 
4 times 
once 
 
Total volume of blood samples 
Each Phase 
52.5 mL 
41.8 mL 
226.1 mL 
593.3 mL 
16 mL 
Screening to Week 24 
320.4 mL 
 
Screening to Week 104 
913.7 mL 
 
Screening to the Follow-up Phase 
929.7 mL 

E6011-J081-202 
 
 
 
 
 
 
Creation: 2016/10/13 
 
3 
(After) Table 2 Volume of Blood Samples 
Test item 
Volume per 
sampling 
Screening 
Phase 
Observation
Phase 
Treatment 
Phase 
Extension 
Phase 
Follow-up 
Phase 
Days –42 
to –1 
Predose of 
Day 1 
Weeks 1  
to 24 
Weeks 26 
to 104 
Viral test, syphilis test, TB test 
26 mL 
once 
 
 
twice 
 
Erythrocyte sedimentation rate 
2 mL 
once 
once 
7 times 
20 times 
 
Hematology 
2 mL 
once 
once 
7 times 
20 times 
once 
Blood chemistry 
10 mL 
once 
once 
7 times 
20 times 
once 
Pregnancy test 
(once)a 
 
(twice)a 
(3 times)a 
 
Serum KL-6 
(once)a 
 
(twice)a 
(twice)a 
 
Anti-JCV antibody test 
3 mL 
once 
 
once 
3 times 
 
Blood CD4-positive cells 
2 mL 
once 
 
twice 
3 times 
 
RF, anti-CCP antibody, MMP-3 
4 mL 
once 
once 
7 times 
20 times 
once 
Autoantibody 
3 mL 
 
once 
twice 
3 times 
 
Serum TRACP-5b concentration 
 
(once)a 
(twice)a 
(twice)a 
 
β-D glucan 
3 mL 
once 
 
twice 
twice 
 
Vasculitis marker tests 
5.8 mL 
 
once 
twice 
6 times 
 
Serum E6011 concentration 
2 or 5 mL 
 
onceb 
8 timesb 
20 timesb 
 
Serum anti-E6011 antibody 
 
onceb 
6 timesb 
20 timesb 
 
Serum total FKN 
 
(once)a 
 
 
 
Serum cytokine concentration, 
serum LRG1, and Ang2 
5 mL 
 
once 
3 times 
twice 
 
Vectra™ DA 
 
(once)a 
(twice)a 
(twice)a 
 
Immunocytes such as blood  
CX3CR1-positive cells 
5 mL 
 
once 
4 times 
once 
 
Total volume of blood samples 
Each Phase 
52.0 mL 
41.8 mL 
225.6 mL 
591.8 mL 
16 mL 
Screening to Week 24 
319.4 mL 
 
Screening to Week 104 
911.2 mL 
 
Screening to the Follow-up Phase 
927.2 mL 
 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/02/23 
 
1 
Overview of Protocol Amendment between Ver. 2 and Ver. 3 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics  
(The parts of change: underline) 
Protocol body 
Pertinent page 
Before Amendment (Ver.2, October 13, 2016) 
After Amendment (Ver. 3, February 23, 2017) 
Reason for Amendment 
P3, 2 
CLINICAL 
PROTOCOL SYNOPSIS 
Inclusion criteria 
 
P23, 
9.3.1 Inclusion criteria 
(4) The history of biologicsNote should be 
limited to 2 biologics among adalimumab, 
infliximab, golimumab, certolizumab pegol, 
etanercept, tocilizumab, and abatacept 
(including biosimilars). 
 
(Note: This includes those treated in clinical 
studies) 
(4) The history of biologics treatmentNote 
discontinued due to insufficient response should be 
limited to 2 biologics among adalimumab, 
infliximab, golimumab, certolizumab pegol, 
etanercept, tocilizumab, and abatacept (including 
biosimilars). 
 
(Note: This includes those treated in clinical studies) 
It was decided that 
biologics that were 
discontinued for other 
reasons than insufficient 
response are excluded 
from the criteria. 
P5, 2 
CLINICAL 
PROTOCOL SYNOPSIS 
Exclusion criteria 
 
P24, 
9.3.2 Exclusion criteria 
(23) Tested positive for any of the following 
in the Screening Phase: HIV, hepatitis B virus 
surface antigen (HBs antigen), hepatitis B 
virus surface antibody (HBs antibody), 
hepatitis B virus core antibody (HBc 
antibody), hepatitis B virus DNA (HBV 
DNA), hepatitis C virus antibody (HCV 
antibody), human T-lymphotrophic virus type 
I antibody (HTLV-1 antibody), or syphilis 
(except if positive for the HBs antibody only, 
and it is clear that this is due to hepatitis B 
(23) Tested positive for any of the following in the 
Screening Phase: HIV, hepatitis B virus surface 
antigen (HBs antigen), hepatitis B virus surface 
antibody (HBs antibody), hepatitis B virus core 
antibody (HBc antibody), hepatitis B virus DNA 
(HBV DNA), hepatitis C virus antibody (HCV 
antibody), human T-lymphotrophic virus type I 
antibody (HTLV-1 antibody), or syphilis (except if 
positive for the HBs antibody only, and it is clear that 
this is due to hepatitis B vaccination) (In case of 
positive RPR and negative TP antibody results in the 
To allow enrollment of 
patients with a false 
positive syphilis test 
result. 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/02/23 
 
2 
Pertinent page 
Before Amendment (Ver.2, October 13, 2016) 
After Amendment (Ver. 3, February 23, 2017) 
Reason for Amendment 
vaccination) 
syphilis test, the positive result is not considered 
valid if a false positivity is confirmed by repeated TP 
antibody negative results of other syphilis tests 
performed 21 days or more later.) 
P6, 2 
CLINICAL 
PROTOCOL SYNOPSIS 
Exclusion criteria 
 
P25, 
9.3.2 Exclusion criteria 
(35) Patient who has been treated with E6011 
or any unapproved biologics indicated for 
RA. 
(35) Patient who has been treated with E6011 or any 
unapproved biologics indicated for RA within 12 
weeks before the start of treatment with the study 
drug. 
To limit the treatment 
period with unapproved 
biologics indicated for 
RA. 
P7, 2 
CLINICAL 
PROTOCOL SYNOPSIS 
Concomitant 
Drug/Therapy 
 
P31, 
9.4.7.1.1 PROHIBITED 
CONCOMITANT 
THERAPIES AND 
DRUGS 
<Prohibited concomitant therapies and drugs> 
•Over-the-counter medications containing 
folic acid as main component 
<Prohibited concomitant therapies and drugs> 
•Activated form folic acid, over-the-counter 
medications containing folic acid as main component 
To clarify the 
description. 
P7, 2 
CLINICAL 
PROTOCOL SYNOPSIS 
Concomitant 
<Restricted medicine> 
-MTX and folic acid are to be continued at a 
stable dose regimen until completion of the 
<Restricted medicine> 
-MTX and folic acid are to be continued at a stable 
dose regimen until completion of the Extension 
To clarify the 
description. 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/02/23 
 
3 
Pertinent page 
Before Amendment (Ver.2, October 13, 2016) 
After Amendment (Ver. 3, February 23, 2017) 
Reason for Amendment 
Drug/Therapy 
 
P31, 
9.4.7.1.2 RESTRICTED 
CONCOMITANT 
THERAPIES AND 
DRUGS 
Extension Phase (or until study 
discontinuation). If an adverse event 
associated with MTX is noted, dose reduction 
is permitted. If the event disappears after dose 
reduction, the dose can be increased to the 
previous level. 
Phase (or until study discontinuation). If an adverse 
event associated with MTX is noted during the 
Extension Phase, dose reduction or interruption is 
permitted. If the event disappears after dose 
reduction or interruption, the dose can be increased to 
the previous level. 
P21, 
9.1.1 Screening Phase 
For subjects who require prophylactic 
treatments with isoniazid based on the results 
of the tuberculosis test at the Screening Phase, 
the prophylactic treatments are needed for at 
least 21 days before starting the study 
treatment, so the duration of the Screening 
Phase may be extended until 21 days from the 
start of isoniazid administrations. 
For subjects who require prophylactic treatments 
with isoniazid based on the results of the tuberculosis 
test at the Screening Phase, the prophylactic 
treatments are needed for at least 21 days before 
starting the study treatment, so the duration of the 
Screening Phase may be extended until 21 days from 
the start of isoniazid administrations. If a patient 
requires another syphilis test based on the result in 
the Screening Phase, reexamination has to be 
performed after an interval of 21 days or longer 
during the Screening Phase. The Screening Phase can 
be extended until the reexamination result is 
obtained. 
Following 
reconsideration of 
Exclusion Criterion 
(23). 
P26, 
9.3.3 Removal of 
Subjects From Therapy or 
(8) Tested positive for any of the following: 
HIV, hepatitis B virus surface antigen (HBs 
antigen), hepatitis B virusDNA (HBV DNA), 
(8) Tested positive for any of the following: HIV, 
hepatitis B virus surface antigen (HBs antigen), 
hepatitis B virus DNA (HBV DNA), hepatitis C virus 
Following 
reconsideration of 
Exclusion Criterion 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/02/23 
 
4 
Pertinent page 
Before Amendment (Ver.2, October 13, 2016) 
After Amendment (Ver. 3, February 23, 2017) 
Reason for Amendment 
Assessment 
hepatitis C virus antibody (HCV antibody), 
human T-lymphotrophic virus Type I antibody 
(HTLV-1 antibody), or syphilis. 
antibody (HCV antibody), human T-lymphotrophic 
virus Type I antibody (HTLV-1 antibody), or syphilis. 
(Confirmed false positive syphilis test result is 
excluded.) 
(23). 
P44, Table 4 Schedule of 
Procedures/Assessments 
in Study E6011-J081-202 
 
At discontinuation: 
Immunocytes such as 
blood CX3CR1-positive 
cells at discontinuation 
note 
(Not mentioned) 
j: Basically performed at study discontinuation, and a 
missing value is permissible only when collection of 
the sample is difficult due to abrupt discontinuation. 
Anticipating some cases 
of abrupt 
discontinuation, when 
recovery of the 
specimen is difficult. 
 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/04/24 
 
1 
Overview of Protocol Amendment between Ver. 3 and Ver. 4 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics  
(The parts of change: underline) 
Protocol body 
Pertinent page 
Before Amendment (Ver.3, February 23, 2017) 
After Amendment (Ver. 4, April 24, 2017) 
Reason for Amendment 
P4, 2 
CLINICAL 
PROTOCOL 
SYNOPSIS 
Exclusion criteria 
 
P23, 
9.3.2 Exclusion criteria 
3.Received biologics during the following 
periods: 
•Adalimumab: within 10 weeks before 
starting the study treatment 
•Infliximab: within 8 weeks before 
starting the study treatment (within 12 
weeks for subjects who received a dose of 
10 mg/kg) 
•Golimumab: within 10 weeks before 
starting the study treatment 
•Certolizumab pegol: within 8 weeks 
before starting the study treatment 
•Etanercept: within 4 weeks before 
starting the study treatment 
•Tocilizumab: within 8 weeks before 
starting the study treatment 
•Abatacept: within 8 weeks before 
starting the study treatment 
3.Received biologics during the following 
periods: 
•Adalimumab: within 6 weeks before starting 
the study treatment 
•Infliximab: within 6 weeks before starting the 
study treatment (within 8 weeks for subjects 
who received a dose of 10 mg/kg) 
•Golimumab: within 6 weeks before starting 
the study treatment 
•Certolizumab pegol: within 6 weeks before 
starting the study treatment 
•Etanercept: within 2 weeks before starting 
the study treatment 
•Tocilizumab: within 6 weeks before starting 
the study treatment 
•Abatacept: within 6 weeks before starting the 
study treatment 
Reconsider the criteria 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/04/24 
 
2 
Pertinent page 
Before Amendment (Ver.3, February 23, 2017) 
After Amendment (Ver. 4, April 24, 2017) 
Reason for Amendment 
P32, 9.4.9 Drug 
Supplies and 
Accountability 
 
The drug accountability logs must be 
made available, upon request, for review 
by a CRA or inspection by a 
representative of a regulatory agency.  
The study drug manager (or designee) 
must check the number of all unused 
study drugs, exchange the study drug 
return form for the study drug recovery 
form with the sponsor, and return all 
unused study drugs (including empty 
boxes) to the sponsor. Unused study 
drugs that are to be returned from the 
site will be collected directly by CRA and 
will be returned to the sponsor’s depot(s). 
The drug accountability logs must be made 
available, upon request, for review by a CRA or 
inspection by a representative of a regulatory 
agency.  The study drug manager (or 
designee) must check the number of all unused 
study drugs, exchange the study drug return 
form for the study drug recovery form with the 
sponsor, and return all unused study drugs to 
the sponsor. Unused study drugs that are to be 
returned from the site will be collected directly 
by CRA and will be returned to the sponsor’s 
depot(s). 
Instruction for empty 
box was described in the 
instructions for handling 
of investigational 
products 
P40, 9.5.2.1 Schedule of 
Procedures/Assessments 
 
Each assessment will be performed within 3 
days before or after the scheduled date during 
Weeks 1 to 12 or within 7 days before or after 
the scheduled date after Week 14 using Week 0 
as a reference point.  In the Follow-up Phase, 
each assessment will be performed within 7 
days before or after the scheduled date (“within 
7 days after the scheduled date” for the 
assessment at “70 days after the last dosing”). 
However, 
the 
interval 
between 
study 
Each assessment will be performed within 3 days 
before or after the scheduled date during Weeks 1 to 
12 or within 7 days before or after the scheduled date 
after Week 14 using Week 0 as a reference point.  In 
the Follow-up Phase, each assessment will be 
performed within 7 days before or after the scheduled 
date (“within 7 days after the scheduled date” for the 
assessment at “70 days after the last dosing”). 
However, the interval between study treatments 
should be at least 3 days until 2 weeks after the start 
Correction (omitted 
unnecessary words) 

E6011-J081-202 
 
 
 
 
 
 
Creation: 
2017/04/24 
 
3 
Pertinent page 
Before Amendment (Ver.3, February 23, 2017) 
After Amendment (Ver. 4, April 24, 2017) 
Reason for Amendment 
treatments should be at least 3 days until 2 
weeks after the start of study treatment, and at 
least 6 days after 4 weeks have elapsed since 
the start of study treatment.  If any scheduled 
assessment or administration of the study drug 
cannot perform within the above period, such 
event will be considered as a protocol 
deviation.  In such a case, each assessment 
will still be performed, but administration of 
the study drug will be skipped. 
of study treatment, and at least 6 days after 4 weeks 
have elapsed since the start of study treatment. If any 
scheduled assessment or administration of the study 
drug cannot perform within the above period, each 
assessment will still be performed, but administration 
of the study drug will be skipped. 
 
P60, 11.8 Handling of 
Study Drug 
All drug supplies are to be used only for this 
study and not for any other purpose.  The 
investigator (or a study drug 
manager/designee) must not peel off any drug 
labels or discard any partly used or unused 
drug supply before approval to do so by the 
sponsor.  At the conclusion of the study and 
as appropriate during the study, the investigator 
(or a study drug manager/designee) will return 
all used and unused drug containers, and 
submit a copy of the completed drug 
accountability form (if requested) to the 
sponsor. 
All drug supplies are to be used only for this study 
and not for any other purpose.  The investigator (or 
a study drug manager/designee) must not peel off any 
drug labels or discard any partly used or unused drug 
supply before approval to do so by the sponsor.  At 
the conclusion of the study and as appropriate during 
the study, the investigator (or a study drug 
manager/designee) will return all unused drug and 
submit a copy of the completed drug accountability 
form (if requested) to the sponsor. 
 
Instruction for used box 
was described in the 
instructions for handling 
of investigational 
products 
 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
1 
Overview of Protocol Amendment between Ver. 4 and Ver. 5 
 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics 
 
(The parts of change: underline) 
Protocol body 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
P2， 
2. CLINICAL 
PROTOCOL SYNOPSIS 
Study Design 
(text omitted) 
When subjects insufficiently respond to the treatment or 
when their disease relapses in the Extension Phase (show 
no improvement from the Observation Phase in both of 
tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
E6011 400 mg every 2 weeks). 
(text omitted) 
*:  When subjects insufficiently respond to the treatment 
or when their disease relapses in the Extension Phase 
(show no improvement from the Observation Phase in both 
of tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
E6011 400 mg every 2 weeks). 
(text omitted) 
If the investigator or subinvestigator judges that the 
response to treatment is insufficient in the Extension 
Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed (reduction of the dose back to 200 mg after 
an increase to 400 mg will also be allowed). 
(text omitted) 
*:  If the investigator or subinvestigator judges that 
response to treatment is insufficient during the Extension 
Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed. 
 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
 
 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
2 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
P6， 
2. CLINICAL 
PROTOCOL SYNOPSIS 
Study Treatments 
(text omitted) 
Extension Phase: E6011 200 mg will be subcutaneously 
administered every 2 weeks until Week 102.  When 
subjects insufficiently respond to the treatment or when 
their disease relapses, dose escalation will be allowed only 
once (6 repeated subcutaneous administrations of 400 mg 
E6011 every 2 weeks). 
 (text omitted) 
However, 4 mL of the study drug may be given 
subcutaneously in 2 separate sites, 2 mL each, only if the 
investigator or subinvestigator judges that the study drug 
can be administered properly. 
(text omitted) 
Extension Phase: E6011 200 mg will be subcutaneously 
administered every 2 weeks until Week 102.  When 
subjects insufficiently respond to the treatment, repeated 
subcutaneous administration (400 mg of E6011 every 2 
weeks) will be allowed. 
(text omitted) 
However, 2 mL of the study drug may be given 
subcutaneously in 1 site only if the investigator or 
subinvestigator judges that the study drug can be 
administered properly. 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
 
Because the safety 
of administering 2 
mL at 1 site was 
confirmed 
P20， 
9.1  Overall Study 
Design and Plan 
(text omitted) 
When subjects insufficiently respond to the treatment or 
when their disease relapses in the Extension Phase (show 
no improvement from the Observation Phase in both of 
tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
E6011 400 mg every 2 weeks). 
(text omitted) 
*:  When subjects insufficiently respond to the treatment 
or when their disease relapses in the Extension Phase 
(text omitted) 
If the investigator or subinvestigator judges that the 
response to treatment is insufficient in the Extension 
Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed (reduction of the dose back to 200 mg after 
an increase to 400 mg will also be allowed). 
(text omitted) 
*:  If the investigator or subinvestigator judges that 
response to treatment is insufficient during the Extension 
Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed. 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
3 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
(show no improvement from the Observation Phase in both 
of tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
E6011 400 mg every 2 weeks). 
P21， 
9.1.4  Extension Phase 
(text omitted) 
When subjects insufficiently respond to the treatment or 
when their disease relapses in the Extension Phase (show 
no improvement from the Observation Phase in both of 
tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
400 mg every 2 weeks). 
(text omitted) 
If the investigator or subinvestigator judges that the 
response to treatment is insufficient in the Extension 
Phase, administration of E6011 400 mg every 2 weeks will 
also be allowed (reduction of the dose back to 200 mg after 
an increase to 400 mg will also be allowed). 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
P22， 
9.2  Discussion of Study 
Design, Including Choice 
of Control Groups 
(text omitted) 
Furthermore, when subjects insufficiently respond to the 
treatment or when their disease relapses in the Extension 
Phase (show no improvement from the Observation Phase 
in both of tender joint counts and swollen joint counts at 2 
consecutive assessments with an interval of ≥1 week), dose 
escalation will be allowed only once (6 administrations of 
E6011 400 mg every 2 weeks). 
(text omitted) 
Furthermore, if the subjects insufficiently respond to the 
treatment in the Extension Phase, the design also allows 
for administration of E6011 400 mg every 2 weeks 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
4 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
P26， 
9.4.1  Treatments 
Administered 
(text omitted) 
Extension Phase: Subjects will receive E6011 200 mg 
every 2 weeks from Week 24 to Week 102 by repeated 
subcutaneous administration.  When subjects 
insufficiently respond to the treatment or when their 
disease relapses, dose escalation will be allowed only once 
(6 repeated subcutaneous administrations of E6011 400 mg 
every 2 weeks). 
(text omitted) 
However, 4 mL of the study drug may be given 
subcutaneously in 2 separate sites, 2 mL each, only if the 
investigator or subinvestigator judges that the study drug 
can be administered properly. 
(text omitted) 
Extension Phase: Subjects will receive E6011 200 mg 
every 2 weeks from Week 24 to Week 102 by repeated 
subcutaneous administration. When subjects insufficiently 
respond 
to 
the 
treatment, 
repeated 
subcutaneous 
administration (400 mg of E6011 every 2 weeks) will be 
allowed. 
(text omitted) 
However, 2 mL of the study drug may be given 
subcutaneously in 1 site only if the investigator or 
subinvestigator judges that the study drug can be 
administered properly. 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
 
Because the safety 
of administering 2 
mL at 1 site was 
confirmed 
P27， 
9.4.1  Treatments 
Administered 
Table 1  Dose and Administration of the Study Drug 
Extension 
Phase: 
Weeks 24 to 
102 
(Open label) 
200 mg 
2 mL 
(2 vialsd) 
Study drug will be given 
subcutaneously 
in 
2 
separate sites, 1.0 mL each, 
among the following sites: 
right or left upper arm, 
right or left abdomen, or 
right or left thigh. 
400 mga 
4 mL 
(4 vialse) 
Study drug will be given 
subcutaneously 
in 
4 
Table 1  Dose and Administration of the Study Drug 
Extension 
Phase: 
Weeks 24 to 
102 
(Open label) 
200 mg 
2 mL 
(2 vials d) 
Study drug will be given 
subcutaneously 
in 
2 
separate sites, 1.0 mL each, 
among the following sites: 
right or left upper arm, 
right or left abdomen, or 
right or left thigh.  
(2 mL of the study drug 
may 
be 
given 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
 
Because the safety 
of administering 2 
mL at 1 site was 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
5 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
separate sites, 1.0 mL each, 
among the following sites: 
right or left upper arm, 
right or left abdomen, or 
right or left thigh.   
(The study drug may be 
given subcutaneously in 2 
separate sites, 2 mL each, 
only if the investigator or 
subinvestigator judges that 
the study drug can be 
administered properly.) 
a:  When subjects insufficiently respond to the treatment or when their 
disease relapses, dose escalation from 200 mg to 400 mg will be allowed 
only once (6 repeated subcutaneous administrations of E6011 400 mg 
every 2 weeks). 
subcutaneously in 1 site 
only if the investigator or 
subinvestigator judges that 
the study drug can be 
administered properly.) 
400 mga 
4 mL 
(4 vialse) 
Study drug will be given 
subcutaneously 
in 
4 
separate sites, 1.0 mL each, 
among the following sites: 
right or left upper arm, 
right or left abdomen, or 
right or left thigh.   
(The study drug may be 
given subcutaneously in 2 
separate sites, 2 mL each, 
only if the investigator or 
subinvestigator judges that 
the study drug can be 
administered properly.) 
a:  When subjects insufficiently respond to the treatment, repeated 
subcutaneous administration (400 mg of E6011 every 2 weeks) will be 
allowed. 
confirmed 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
6 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
P29， 
9.4.4  Selection of 
Doses in the Study 
(text omitted) 
In the Extension Phase, subjects will receive 200 mg 
administrations of E6011 (central dose) every 2 weeks.  
When subjects insufficiently respond to the treatment or 
when their disease relapses in the Extension Phase (show 
no improvement from the Observation Phase in both of 
tender joint counts and swollen joint counts at 2 
consecutive assessments), dose escalation will be allowed 
only once (6 administrations of E6011 400 mg every 2 
weeks).  As the guidelines indicate that drug therapies for 
RA should be reviewed every 3 or 6 months, it is 
appropriate to set the period for administration of E6011 
400 mg every 2 weeks to be 3 months (6 administrations). 
(text omitted) 
In the Extension Phase, subjects will receive 200 mg 
administrations of E6011 (central dose) every 2 weeks. 
However, when subjects insufficiently respond to the 
treatment (E6011 200 mg every 2 weeks), dose escalation 
will be allowed (E6011 400 mg every 2 weeks). 
To revise the dose 
escalation criteria 
and abolish the 
restrictions on the 
number of dose 
escalations 
P43， 
Table 4  Schedule of 
Procedures/Assessments 
in Study E6011-J081-202 
 
70 days after the last 
dosing: 
Immunocytes such as 
blood CX3CR1-positive 
cells 
(no text) 
Xk (Blood collection for immunocytes such as blood 
CX3CR1-positive cells 70 days after administration was 
added) 
k.  Will only be conducted if blood sample is judged to be 
feasible at the visit. 
To evaluate changes 
in parameters such 
as CX3CR1-positive 
cells 
after 
administration as an 
exploratory 
investigation 
 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
7 
Pertinent page 
Before Amendment (Ver. 4, April 24, 2017) 
After Amendment (Ver. 5, August 31, 2018) 
Reason for 
Amendment 
P45， 
9.5.2.2  Volume of 
Blood Samples 
Table 5 
See following pages 
To evaluate changes 
in parameters such 
as CX3CR1-positive 
cells 
after 
administration as an 
exploratory 
investigation 
 
To revise the text 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
8 
 
(Before Amendment) Table 5  Volume of Blood Samples 
 
Test item 
Volume per 
sampling 
Screening 
Phase 
Observation 
Phase 
Treatment 
Phase 
Extension 
Phase 
Follow-up 
Phase 
Days –42 
to –1 
Predose of 
Day 1 
Weeks 1  
to 24 
Weeks 26 
to 104 
Viral test, syphilis test, TB test 
26 mL 
once 
 
 
twice 
 
Erythrocyte sedimentation rate 
2 mL 
once 
once 
7 times 
20 times 
 
Hematology 
2 mL 
once 
once 
7 times 
20 times 
once 
Blood chemistry 
10 mL 
once 
once 
7 times 
20 times 
once 
Pregnancy test 
(once)a 
 
(twice)a 
(3 times)a 
 
Serum KL-6 
(once)a 
 
(twice)a 
(twice)a 
 
Anti-JCV antibody test 
3 mL 
once 
 
once 
3 times 
 
Blood CD4-positive cells 
2 mL 
once 
 
twice 
3 times 
 
RF, anti-CCP antibody, MMP-3 
4 mL 
once 
once 
7 times 
20 times 
once 
Autoantibody 
3 mL 
 
once 
twice 
3 times 
 
Serum 
TRACP-5b 
concentration 
 
(once)a 
(twice)a 
(twice)a 
 
β-D glucan 
3 mL 
once 
 
twice 
twice 
 
Vasculitis marker tests 
5.8 mL 
 
once 
twice 
6 times 
 
Serum E6011 concentration 
2 mL 
or は 
5 mL 
 
onceb 
8 timesb 
20 timesb 
 
Serum anti-E6011 antibody 
 
onceb 
6 timesb 
20 timesb 
 
Serum total FKN 
 
(once)a 
 
 
 
Serum cytokine concentration, 
serum LRG1, and Ang2 
5 mL 
 
once 
3 times 
twice 
 
Vectra™ DA 
 
(once)a 
(twice)a 
(twice)a 
 
Immunocytes such as blood  
CX3CR1-positive cells 
5 mL 
 
once 
4 times 
once 
 
Each Phase 
52.0 mL 
41.8 mL 
225.6 mL 
591.8 mL 
16 mL 
Screening to Week 24 
319.4 mL 
 
Screening to Week 104 
911.2 mL 
 
Screening to the Follow-up Phase 
927.2 mL 
a:  Blood collections for these items (inside the brackets) are included in those for the items just above. 
b:  The volume of blood sample is 5 mL at the time point for assessing both serum E6011 concentration and serum anti-E6011 
antibody and 2 mL at the time point for assessing serum E6011 concentration only. 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2018/8/31 
9 
 
(After Amendment) Table 5  Volume of Blood Samples 
 
a:  Blood collections for these items (inside the brackets) are included in those for the items just above. 
b:  The volume of blood sample is 5 mL at the time point for assessing both serum E6011 concentration and serum anti-E6011 
antibody and 2 mL at the time point for assessing serum E6011 concentration only. 
c:  Twice for subjects who discontinue treatment later than Week 52 
d:  Will only be conducted if blood collection is judged to be feasible at the visit. 
Test item 
Volume per 
sampling 
Screening 
Phase 
Observation 
Phase 
Treatment 
Phase 
Extension 
Phase 
Follow-up 
Phase 
Days –42 
to –1 
Predose of 
Day 1 
Weeks 1  
to 24 
Weeks 26 
to 104 
Viral test, syphilis test, TB test 
26 mL 
once 
 
 
twice 
 
Erythrocyte sedimentation rate 
2 mL 
once 
once 
7 times 
20 times 
 
Hematology 
2 mL 
once 
once 
7 times 
20 times 
once 
Blood chemistry 
10 mL 
once 
once 
7 times 
20 times 
once 
Pregnancy test 
(once)a 
 
(twice)a 
(3 times)a 
 
Serum KL-6 
(once)a 
 
(twice)a 
(twice)a 
 
Anti-JCV antibody test 
3 mL 
once 
 
once 
3 times 
 
Blood CD4-positive cells 
2 mL 
once 
 
twice 
3 times 
 
RF, 
anti-CCP 
antibody, 
MMP-3 
4 mL 
once 
once 
7 times 
20 times 
once 
Autoantibody 
3 mL 
 
once 
twice 
3 times 
 
Serum 
TRACP-5b 
concentration 
 
(once)a 
(twice)a 
(twice)a 
 
β-D glucan 
3 mL 
once 
 
twice 
twice 
 
Vasculitis marker tests 
5.8 mL 
 
once 
twice 
6 times 
 
Serum E6011 concentration 
2 mL 
or 
5 mL 
 
onceb 
8 timesb 
20 timesb 
 
Serum anti-E6011 antibody 
 
onceb 
6 timesb 
20 timesb 
 
Serum total FKN 
 
(once)a 
 
 
 
Serum cytokine concentration, 
serum LRG1, and Ang2 
5 mL 
 
once 
3 times 
twice 
 
Vectra™ DA 
 
(once)a 
(twice)a 
(twice)a 
 
Immunocytes such as blood  
CX3CR1-positive cells 
5 mL 
 
once 
4 times 
oncec 
onced 
Each Phase 
52.0 mL 
41.8 mL 
225.6 mL 
591.8 mL 
21 mL 
Screening to Week 24 
319.4 mL 
 
Screening to Week 104 
911.2 mL 
 
Screening to the Follow-up Phase 
932.2 mL 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2019/3/25 
1 
Overview of Protocol Amendment between Ver. 5 and Ver. 6 
A Phase 2 Study of E6011 in Subjects With Rheumatoid Arthritis Inadequately Responding to Biologics 
 
(The parts of change: underline) 
Protocol body 
Pertinent page 
Before Amendment (Ver. 5, August 31, 2018) 
After Amendment (Ver. 6, March 25, 2019) 
Reason for Amendment 
P7， 
2. CLINICAL PROTOCOL 
SYNOPSIS 
Concomitant Drug/Therapy 
P31， 
9.4.7.1.2  Restricted 
Concomitant Drugs 
(no text) 
<Restricted Concomitant Drugs> 
·After the date Version 6 of the protocol is approved by 
IRB, dose reduction, dose interruption, dose increase 
following the dose reduction (up to the initial dose level), 
and restarting administration after interruption will be 
allowed for MTX, folic acid, corticosteroids, or herbal 
medicine indicated for RA). There will be no restrictions in 
using NSAIDs (oral, suppository, or topical). 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P8， 
2. CLINICAL PROTOCOL 
SYNOPSIS 
Assessments 
(no text) 
After the date Version 6 of the protocol is approved by 
IRB, it is unnecessary to conduct assessments other than 
<safety>. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P19， 
7. INTRODUCTION 
(no text) 
The last subject entered the Extension Phase (open-label) 
in March 2018, and all subjects had completed 52 weeks of 
treatment with E6011 by March 2019. Consequently, it was 
considered unnecessary to conduct any non-safety 
assessments after March 2019, and the protocol will be 
revised to Version 6. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2019/3/25 
2 
Pertinent page 
Before Amendment (Ver. 5, August 31, 2018) 
After Amendment (Ver. 6, March 25, 2019) 
Reason for Amendment 
P26， 
9.3.3  Removal of Subjects 
From Therapy or Assessment 
(no text) 
(9) When the investigator or subinvestigator judges that 
efficacy of E6011 is insufficient, after the date Version 6 of 
the protocol was approved by IRB 
(10) When the investigator or subinvestigator judges that 
there are other effective treatment options available besides 
continuing this study, after the date Version 6 of the 
protocol was approved by IRB 
To add provisions 
P30， 
9.4.7  Prior and Concomitant 
Therapy 
(no text) 
After the date Version 6 of the protocol is approved by 
IRB, it is unnecessary to record concomitant 
medications/therapies in the CRF. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P33， 
9.5.1.3  Efficacy Assesments 
(no text) 
After the date Version 6 of the protocol is approved by 
IRB, it is unnecessary to conduct assessments for efficacy. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P34， 
9.5.1.4  Pharmacokinetic, 
Pharmacogenomic, Biomarker, 
and Immunogenicity 
Assessments 
(no text) 
After the date Version 6 of the protocol is approved by 
IRB, it is unnecessary to conduct assessments for 
pharmacokinetic, pharmacogenomic, biomarker, and 
immunogenicity. However, pharmacokinetic and 
immunogenicity assessments will be conducted at 
discontinuation. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 

E6011-J081-202 
 
 
 
 
 
 
Creation 
2019/3/25 
3 
Pertinent page 
Before Amendment (Ver. 5, August 31, 2018) 
After Amendment (Ver. 6, March 25, 2019) 
Reason for Amendment 
P40， 
9.5.2.1  Study Schedule 
(no text) 
After the date Version 6 of the protocol is approved by 
IRB, it is unnecessary to conduct "tender and swollen joint 
counts/ESR", "VAS/HAQ", "RF/anti-CCP 
antibody/MMP-3", "serum E6011 concentration", "serum 
anti-E6011 antibody", "serum total FKN concentration", 
"cytokines/LRG1/Ang2", "TRACP-5b", 
"CX3CR1-positive cell count", or "Vectra™ DA". 
However, assessments of "serum E6011 concentration" and 
"serum anti-E6011 antibody" will be conducted at 
discontinuation. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P44， 
9.5.2.1  Study Schedule 
Table 4 Remarks 
(no text) 
l  After the date Version 6 of the protocol is approved by 
IRB, applicable assessments will not be conducte. 
However, assessments of serum E6011 concentration and 
serum anti-E6011 antibody will be conducted at 
discontinuation. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
P45， 
9.5.2.2  Volume of Blood 
Samples 
(no text) 
As it is unnecessary to conduct non-safety assessments 
after the date Version 6 of the protocol is approved by IRB, 
the volume of blood samples may be lower in applicable 
subjects. 
Because it was considered 
unnecessary to conduct 
any non-safety 
assessments 
 
  

Pages 100-220  removed - non-English text  removed.