INT R O D U C T I O N

01

Inﬁnite combination

Units can be stacked and arranged like blocks, and used for various purpose.
we contribute to the expansion of the product lineup.

We established a short-term construction methodthat completely deﬁes conventional wisdom of wooden construction.
We promote an optimization of the business environment.

Shortening to

13

Capital efﬁciency
Until the period at

tripleAppropriate secure proﬁt by short process and cutting costs.

02

High streng th with a small material.

1300 y e a r s

Cristal of technology

A Japanese traditional technique that has continued since Horyuji has been constructed.
03Japanese research institutes recognized that units are cleared the best earthquake resistance grade.

130

Cooperate value※%

The top 10 wooden material ESG company ranking showed that an average corporate value increase are 30% during the survey period.
(8/30/2020 to 10/8/2021 according to Nikkei Stock Average rises 21%)
※Tokyo Kenzai ESG company ranking

Units are the ecological structures and sustainable.
CLT CELL UNIT is variable for this century and production
follows the trend in the world.

Global forest investment$700

billionReusable after use. It is a sustainable product that eligible for government subsidies.
The inﬂow of funds into forest resources is accelerating globally.
※Refered to "Solving social issues and investing during the pandemic of COVID-19," SIIF: Social Innovation and Investment Foundation.

※
04

05

INDEX

01
INTRODUCTION

05
INDEX

07
ISSUES

09
11

PRODUCT

06

HISTORYTECHNICAL

13
LINE UPCASE

19
SYSTEM

21
MESSAGEISSUES

Protecting Japanʼs forest
is our mission
in the construction industr y.
Currently, most of wooden houses and buildings in Japan are used imported timber.
As a result, domestic timber usage is decreasing and Japanese forests are abandoned and neglected.
On the other hand, various forest problems occur globally, such as illegal logging, overexploitation, and the forest ﬁres.

07

Since 1996, Japan established the law for liberalization of importing timber.
The timber self-sufﬁciency rate had been closed to 80% at that time, but it decreased to 20% in 2002.
In 2016, the self-sufﬁciency rate recovered to 35%, however, we still use imported timber.

We, Japanese construction industry, are in position to take responsibility
for resolving these problems of forests and face for the future.
We, Sai Group Holdings discovered a one of the solutions that is to use domestic CLT materials.
We created a completely new method of construction “CLT CELL UNIT”.

In 2013, established the JAS (Japanese Agricultural Standards) in japan, and started to general use in 2016.
By using CLT materials, we increase the recycling of forest resources and improve the global forest environment.
Also, we are looking for partners to participate in the sustainable project.

The spread of the “CLT CELL UNIT” will be a big step toward restoring the rich forests.
We believe this is the responsibility of the construction industry.

What is the forest environment problems of Japan?
The development of the CLT CELL UNIT, the CO2-saving construction that can be recycled and revive Japanese forests
through the use of CLT materials, is one of the solutions to global environmental problems,and is useful for both forests and human being.

60%

OVER

08

IMPORT

More than 60% of timber use

Decreasing use of domestic timber

Degraded forests have deteriorated soil,

are imported

occurs forest devastationand they cause disasters such as landslide.

and deterioration.

CLT CELL UNIT al so suppor ts the SDGs among other initiatives.

09

CLT CELL UNIT is the new construction method and structureusing 100% domestic materials.

A 100% made with CLT material s,
and box-shaped unit that is joined with “ tiki lock ”
CLT CELL UNIT is the box-shaped wooden unit sized 7.6feet×16.4feet×9.8feet,and can be constructed with stack and arrangement.
This structure has possibilities of new construction method.
For joint, we use the Japanese traditional technology named “Tiki lock”,
so we implement this unit is made with 100% wood. In addition,
we pre-build the units at the factories, so we can shorten the construction period.

Tiki Lock

A pre-build unit transported from the factory needs only placed on a foundation

Japanese traditional way to join the joints.
No metal, only wood to join.

and connection, so the period is also shortened to 1/3.
Units have already used for emergency facilities in disasters in Japan.

PRODUCT

About the CLT materials in recent years
Domestic wooden materials with high strength. It will change the future of wooden construction method
LT means “Cross Laminated Timber”. it is made bysome boards. Fiber directions are perpendicular toeach other, so CLT material becomes stronger thanconventional laminated timber, and it is strong as
concrete. Because it is difﬁcult to deform, it can beu s e d a s a s tr u c tu re to s u p p o r t b u i ld i n g s . I n
addition, it can be multiple effects such as heatinsulation, ﬂame insulation, and sound insulation.
It reduces CO2 during manufacturing, so it is one of
the biggest attractions

History and prevalence of CLT in the world

Global CLT
production capacity ※1

CLT has spread especially in Europe and Austria

2.8 million m /Year3

since 1995. Its use is expanded as a structure
because it is easy to process. For now, Japanaccount for producing CLT is about only 0.5% of
the world, but believed to become more popular inJapanese CLT production capacity ※2

0.63 million m /Year
3

only

0.5 %

in Japan※1 (According to Nikkei Newspaper 27/01/2022)※2 (Research from Japan CLT Association 27/01/2022)

the future.

Recently, Japanese government has also
allocate their budgets for CLT.
In this time, more than 60% of wood materials are

956

case
（plans）

Cumulative number of
construction using CLTfrom other countries. Producing CLT in Japan・Growth of the forestry and timber industries $102million●Ministry of Land, Infrastructure, Transport and Tourism

477caseJapan. The Japanese government is promoting

・Business for sustainable buildings $6.2million
・Project to promote the development of quality wooden buildings $245million

various policies related to the use of CLT materials
because it is recyclable resource, and has great・Development of production system for wooden and urban wooden buildings $3.5million

319casebeneﬁts for the world society.

●Ministry of the Environment

200case29case 54 casebefore2014 2015

$60,3billion

・Strengthen use of wood for construction $15million

617casesupports forest conservation and development in

Support for CLT●Ministry of the Forest

777caseCabinet ofﬁce for the promotionof CLT utilization

Japanʼs policy for CLT -2022-

・Promoting the decarbonization and resilience of building $100million
・ZEH support project $45million

105case・Project of CO2 reduction in collective housing $45million
・Evaluation prize project for simultaneous achievement of CE×CN by reusing wood $1million

2016

2017

2018

2019

2020

2021

2022

※Budget that can be used for CLT buildings Ministry of Health, Labor and Welfare $3.4billion

10

2020

Apr.

Feb.

Conducted two-stories units construction
experiment of CLT CELL UNIT

Apr.

Gave a unit as Mihara Garden tea room (Nagasaki)
to Mr. Kazuyuki Ishihara

Apr.

Provided units as PCR test buildings
to prefectural hospitals(Fukuoka, Kyoto, Saitama, Kumamoto, others)

started research and development ofstructures using CLT

2018

・・・

HISTORY
11

2017

Jul.
May.

Test CLT CELL UNIT No.1 was constructed

Aug.

Started development with Japanese systemdesign and certiﬁcation

Sep.

ﬁrst connected CLT CELL UNITs are constructedFirst hexagonal unit constructed

2019

Jul.

・・・

Tested earthquake resistance andconﬁrmed as two-stories units
Obtained a patent for “box-shaped building
units and building” using CLT

Dec.

Opened a ﬁrst Bento shop, HottoMotto
using CLT CELL UNIT
(Using ﬂy ash concrete foundation)

Apr.

Started development with Joto Techno Co., Ltd
for secondary materials

May.

Nikkan Mokuzai Shimbun(Japan wood material newspaper) started
a series of articles titled“CCUʼs Challenge”

Adopted units to Hitoyoshi city, Kumamoto pref.
for isolation waiting rooms for COVID-19
and temporary housing

Get trademarks for “Tiki lock” and “Under 50”

Aug.

Started joint research with Prof.
Fujita, University of Kitakyushu“The CLT Cabin” opened at Exhibition placeat Nijo city, Fukuoka

Oct.

Conducted a business alliance agreementwith Miyoshi Sangyo Co., Ltd for CLT CELL UNIT

May.

Opened CLT CELL UNIT facilities(Karatsu city, Saga Pref.)Dec.

Started to sell “HANAREGA”
from SAI Kenchikusha Co., Ltd

Acquired two-story model plan “CCU-01”
and 3types of evaluation plan
Started developmentwith YKK AP Co., Ltd for openings

Started Structural strength test

Jul.
Aug.

Mar.

causing ﬂood disasterStarted second-termed unit tests

Nov.
Jan.

2022

Started joint research with Prof.
Hiroshi Isoda, University of Kyoto
Released concept movies of CLT CELL UNIT

2021

2023

Jan.

Adopted units for “Hitoyoshi recovery
container Marche” to Hitoyoshi city,
Kumamoto pref.

Mar.

conducted a three-story building experimentwith MEIKEN Kogyo Co., Ltd

Apr.

Selling CLT CELL UNIT,“CCU1” at Costco in Kumamoto pref.

Apr.

Established GATE Co., Ltd for CLT CELL UNIT
distribution management and design planning

TECHNICAL

Strong, environmentally friendly, latest. Reason why it is chosen

Patented

The best score

Easy construction

We have 3 patents for “box-shaped unit building”

We e x a m e d m a n y t i m e s f o r e a r t h q u a k e

We repeated build and demolish to make sureand patent for “Tiki Lock for jointed structure” inresistance test in public experiments, and getthat everyone can construct and realize theJapan. we also have a patent in the US.

the b es t score, g rade 3 in Japan. It shows

strength of it.

extremely high strength and safety.

Collaborating with the best technologists
We collaborate with many of the top technologists of CLT, so
CLT CELL UNIT evolve every day and evaluated.

Co-studying
technology
Performance of evaluation

We have support of a lot ofcompanies and engineers

We have appropriately ev aluate d it s

to evolve. We will continue

per formance by the government, Building

to be a company to evolve

Center of Japan. It is evaluated in laws.

not only CLT CELL UNIT,
but also companies
support us.

12LINE UP■Speciﬁcation

1

Basic Unit 500 series /700 seriesSize 194.5inch×88.2inch×103.5inch

2Less than 10m2 sized unit 500 seriesSize 180.3inch×88.2inch×103.5inch

H
3High strength unit 700 seriesSize 235inch×89.4inch×112.2inch

413

f36 (non-architectural)

W

D

36mm

610
410
■ 500 series(Standard)■ 700 series(High strength)

90

90

500

610

Realized short period of
construction and unitization

Usable as struct. Diversity ofuses through your ideas

Units, that are structures. They are assembled at a

Box-shaped units can not only be used alone,factory, and transported to the place. One day period

but also used in a variety of ways. Arranging

when the foundation is already ﬁnished because units
only need to be placed on it. From there, the interior
and exterior need to be ﬁnished, but it is possible todelivery time

1/3

Side by side
Solo
All

multiple units side by side, stacked, combinate
with other structures. Also, the material is very
light compared with concrete and metal, it canshorten the construction period at 1/3 compared with

reduce the load on ground reinforcement andnormal period. Its merit also makes use as hospitality

foundations, it helps you to cut the cost andand temporally house when natural disasters occur.

shorten the construction period.

Stack

14

Experimental model "CCU̲01"

CASE

Area not included in structure price01

Minimal materials

CELL

OVER

35㎡

CELL

OVER

35㎡

×4
CELL

Reduce construction costs of buildings
A large space without pillars is realized increasing the space of the cells.
Cells bears the vertical force and horizontal force,Space over 377㎡

One cell supports 430ft2

Pillar-free space is wider than wall-type RC.

700 series cell is high strength,

so braces are not required on the outer wall.

Not only you can design freely,

one cell bears 430ft 2 at two-stories.

Having distance creates maximum space while reducing costs.

but also cut the cost of the construction.

15

The CLT Cabin"SAI Kenchikusha Co., Ltd"

02

Short-term
construction period
Pre-build construction
Pre-build more than 50% at the factory.

Existing method

designShorten

CASE

Packaging

CCU method.
(Pre-build type).

Construction period can be 1/3, so it is not only to
reduce the cost, but also greatly increase the turnover the funds.

construction planmaterials

expand the pre-build range

Designdivision within deliveryof materials

・Reduce labor costs
・expansion of building
・improve proﬁt margin per hourmaterial business

Field construction

Shorten the period

Field
construction
periodreduce the construction cost・reduce 70% of the cost・increase the proﬁt margin

small size

medium size

12month

24 month

Shorten the period

small size

medium size

8month12month16

Store "Hotto Motto"

CASE

03

Auberge akadama

CASE

04

Relocation / Reuse architecture

Wooden space

Construct with assuming relocation

Enhance livability

The method of CLT CELL UNIT is easy to relocate since

Wooden material has the good effects on

it is used only 4 anchors per cell.

human not only heat insulation,

We provide to reuse the cell with a next business.

but also sound insulation.

Reusing the architecture made of recyclable materials is reﬂectedto total costs.

We recommend using CLT materials for livability.

CASE

06

Case of emergency
Fast response of emergency
Usable in role of shelters, goods,
and materials when the disaster occurs.
Fast reaction for emergency is required in this century
due to climate change and social conditions.
there are various ways to use the CLT CELL UNIT
because of the intensity and moving.

Container marché in Hitoyoshi, Kumamoto

17

CASE

Kid's room

05

CASE

07

Wooden container

f36 / for indoor use

Using the unit alone

Livable space

Container, tiny house and small building are used recently.

Kids room, meeting room,

CLT CELL UNIT provides high grade space.

and various function room has become popular.
f36 is wooden and unique shape, and it is easy to install.

Drive-through inspection unit for COVID-19

18

Three-stories condominium (idea)

CASE

08

Individual design

Technical support for CLT CELL UNIT
We can provide a wide range of support such as design, mediate designers,
consultation for construction, and tools etc..

Utilization forlarge or medium-sized architecture
CLT CELL UNIT also can be constructedlarge or medium-sized and special shape. It is very ﬂexible.
We can provide any types of construction of using CLT.
We can support your any questions and requests.

CLT materials

how to build

information

design documents

OPEN PRODUCTS

EXPANDING THE CLT CELL UNIT

OPEN INNOVATION

Any where, anybody, for making houses with environmental friendly

OPEN PRODUCTS

Constructionindustry

Constructionindustry

Constructionindustry

We share all information of CLT CELL UNIT, whichmeans it is open product. We do that because we desirethat anybody can construct this new and environmental
19

CLT

B ase

friendly architecture. For that, we expand the factory tobuild it easily.
Construction
Materials.

designer.

・build・pre-build

Seller

Gate

=Base
Other
materials

SHOW CAS E.
・exhibition

Firstly, exhibition place (Show Case) needs to be made for themarketclients
ownerscompanies
government

Finishingmaterials

local companies to manage and to operate. This Show Case isopened for anyone to see and visit. General customers, local
design ofﬁces, construction companies, etc..
Also, to promote units efﬁciently in each region, there is acompany names “Gate” that exists only for CLT CELL UNIT.

This system is for domestic use in Japan.

Distributor/ makers

CHANGING THE FUTURE WITH WORLD ENVIRONMENT
For the future of CLT CELL U N IT, for the future of us

CLT CELL UNIT ASSOCIATIONOPEN INNOVATION“An idea comes from a ﬁeld”. We believe this. We have created the system that ideas of the ﬁeld connects the evolution of technology.

You will be able to browse the website for association members. The
website of CLT CELL UNIT association is equipped the ideas andproducts of other companiesʼ members. You can also share your ideas
and product.

CLT CELL UNIT evolve with ideas of people who are various positions.

■Join the membership fee: ¥2,000

Information is shared on the website.

License system

CLT CELL UNIT Association
Web Site

Makers of materials
Makers of parts
Heat system

Sales ofexclusive parts

Development ofspecial parts.

Commercializationof parts

Business planner

Sharing
product plans

Method designer
Structural design
Company

Update information

CLT CELL UNIT
MarketDesign data.
Sales priceDevelopment
information

Finished product

The association has decided to adopt the license to construct the unit
for being recognized from people. So that you can get updated
technologies any time, anywhere. To get a license, you need to attend
the course. Thank you for your understanding.

free trade

License for assembling CCU For wood companies and material companies
Use ofpatentPurchaseof price

Builder(member)

Purchasemerchandise

Sales price

Sharingbusiness plans

Special parts
Provisionof services

Design materials forindividual properties

Request to design■License for CCU assembling fee : ¥20,000 per month■To get a license for assembling CCU : ¥2,150,000$21,500（price can be changed due to price ﬂuctuation）
・Lectured by an engineer who can manage product accuracy.
・We will conduct a unit while the lecture.
・We will give you pamphlets, guidebooks, and novelties.
License for construction

Sales price

ODM

We will take on the role of a manufacturing the base of CLT CELL UNIT.
And then, you can sell units to the companies that have a license forconstruction. You also take the role to manage the productsʼ accuracy.

Request for
construction costs

Members of CLT CELL UNIT Association

Members of the association including operators, companies, designers and manufactures.

Only for companies who havea construction business license.

You can construct CLT CELL UNIT af ter you attend the course forlicense. You can construct units with understanding the CLT panel
construction. For design, a designer of each company needs to apply forthe license.
■License for CCU construction fee : ¥20,000 per month■To get a license for CCU construction : ¥500,000 (Purchasing cell by list price)(price can be changed due to price ﬂuctuation)
・We will give you pamphlets, guidebooks, and novelties.
・Please contact for building material companies for speciﬁc information.
This system is for domestic use in Japan.

20

MESSAGE

21

Wish to take a responsibility as acompany engaging in social activities.
I have built many houses as a carpenter. At some point, I
knew most of wooden materials are imported. It mademe consider about Japanese forestry industry and theforests of the world. Forests in the world are destroyed
to export them to Japan, on the other hand, the use ofdomestic lumber decreased in Japan. I knew this point is
the one that made the problem that Japanese forests aredegraded and cause forest disaster and disease. At thatpoint, as a one of the companies engaging in social
activities, I was driven to take a responsibility.
At that time, I knew CLT that was born in Europe. It was originally developed from waste ofwood when natural disaster occurred. I recognized it is recyclable material functionally, and it
can help forests to recovery. For the housing, we have a lot of problems since natural disasters.
However, I thought building houses using CLT can solve not only forest industry and forest
problems, but also lives of people. This is the reason why I started researching CLT. We had
study and repeat the prototype more than a hundred, using a Japanese traditional and special
technique that to join parts only using wood. Also, we made an effort to build box-shaped units
to function as construction. As a result, our construction method substantiated the highest
score of earthquake resistance grade and get some patents. For now, we still keep it evolve with
top technologists.
I feel we ﬁnally reached the starting point. CLT CELL UNIT is the totally new method of
construction for forests, the Earth, and our future. We are looking forward to your join andsharing the future.
SAI Group Holdings

CEO

Kenya Ebisu

22

SAI GRO U P H O LDINGS Co., Ltd
4 - 45 -55 N oke S aw ar aku Fukuok ashi, Fukuok aken

h t t p s : // c l t c e l l u n i t . c o m