【2021 年】
1．Exploring the Competencies of Japanese Expert Nurse Practitioners: A Thematic Analysis.
Mari Igarashi, Ryuichi Ohta, Yasuo Kurita, Akinori Nakata, Tsutomu Yamazaki, Harumi
Gomi
Healthcare (Basel, Switzerland) 9(12) 2021 年 12 月 3 日
2．Left Lower Abdominal Pain as an Initial Symptom of Multiple Myeloma.
Fumiko Yamane, Ryuichi Ohta, Chiaki Sano
Cureus 13(12) e20652 2021 年 12 月
3．Natural Killer T Cell Intravascular Lymphoma With Presentation of Musculoskeletal Pain: ACase Report.
Shiho Amano, Ryuichi Ohta, Chiaki Sano
Cureus 13(12) e20711 2021 年 12 月
4．Consideration of Intestinal Failure in Cases of De-Adaptation of Short Bowel Syndrome: A
Case Report and Descriptive Review.
Tasuku Kato, Yasuhisa Nakano, Fumiko Yamane, Ryuichi Ohta, Chiaki Sano
Healthcare (Basel, Switzerland) 9(12) 2021 年 11 月 30 日
5 ． Effect of Residents-as-Teachers in Rural Community-Based Medical Education on theLearning of Medical Students and Residents: A Thematic Analysis.
Nozomi Nishikura, Ryuichi Ohta, Chiaki Sano
International journal of environmental research and public health 18(23) 2021 年 11 月 25 日
6．The Relationship between the Presence of White Nails and Mortality among Rural, Older,Admitted Patients: A Prospective Cohort Study.
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
Healthcare (Basel, Switzerland) 9(12) 2021 年 11 月 23 日
7．Solving Social Problems in Aging Rural Japanese Communities: The Development andSustainability of the Osekkai Conference as a Social Prescribing during the COVID-19
Pandemic.
Yumi Naito, Ryuichi Ohta, Chiaki Sano
International journal of environmental research and public health 18(22) 2021 年 11 月 12 日

8．Recognition of Anemia in Elderly People in a Rural Community Hospital.
Shiho Amano, Ryuichi Ohta, Chiaki Sano
International journal of environmental research and public health 18(21) 2021 年 10 月 25 日
9．Changes in the Comprehensiveness of Rural Medical Care for Older Japanese Patients during
the COVID-19 Pandemic.
Ryuichi Ohta, Akinori Ueno, Chiaki Sano
International journal of environmental research and public health 18(20) 2021 年 10 月 14 日
10．A Case of Cast Nephropathy Found as the Cause of Severe Renal Failure.
Gen Adachi, Naoto Mouri, Ryuichi Ohta, Chiak Sano
Cureus 13(10) e19135 2021 年 10 月
11．Association between immunoglobulin g levels and adverse effects following vaccination withthe bnt162b2 vaccine among japanese healthcare workers
Jun Otani, Ryuichi Ohta, Chiaki Sano
Vaccines 9(10) 2021 年 10 月
12．The Perception of Rural Medical Students Regarding the Future of General Medicine: A
Thematic Analysis.
Kasumi Nishikawa, Ryuichi Ohta, Chiaki Sano
Healthcare (Basel, Switzerland) 9(10) 2021 年 9 月 24 日
13．The Seamless Communication on a Rural Island in Japan: A Qualitative Study from thePerspective of Healthcare Professionals.
Moe Kuroda, Ryuichi Ohta, Kaku Kuroda, Seiji Yamashiro, Keiichiro Kita
International journal of environmental research and public health 18(18) 2021 年 9 月 8 日
14．Rapidly Growing Aneurysm with Ulcer-like Projection Complicated with <i>Bacteroides
ovatus</i> Bacteremia
Masayoshi Kusunoki, Ryuichi Ohta, Jumpei Sawa, Chiaki Sano
Reports 2021 年 9 月
15．Rural Family Medicine Education During the COVID-19 Pandemic.
Ryuichi Ohta, Chiaki Sano
Family medicine 53(8) 732-732 2021 年 9 月

16．Potential Help-Seeking Behaviors Associated with Better Self-Rated Health among RuralOlder Patients: A Cross-Sectional Study.
Ryuichi Ohta, Mikiya Sato, Jun Kitayuguchi, Tetsuhiro Maeno, Chiaki Sano
International journal of environmental research and public health 18(17) 2021 年 8 月 29 日
17．The Association between the Self-Management of Mild Symptoms and Quality of Life ofElderly Populations in Rural Communities: A Cross-Sectional Study.
Ryuichi Ohta, Mikiya Sato, Jun Kitayuguchi, Tetsuhiro Maeno, Chiaki Sano
International journal of environmental research and public health 18(16) 2021 年 8 月 23 日
18．The Contribution of Temporal Flat Lateral Position on the Mortality and Discharge Ratesof Older Patients with Severe Dysphagia.
Akiko Shimizu, Ryuichi Ohta, Hana Otani, Chiaki SanoInternational journal of environmental research and public health 18(16) 2021 年 8 月 10 日
19．Acute Facial Edema in a Patient with Systemic Lupus Erythematosus
Shiho Amano, Ryuichi Ohta, Chiaki Sano
Reports 2021 年 8 月
20．What resources do elderly people choose for managing their symptoms? Clarification ofrural older people's choices of help-seeking behaviors in Japan.
Ryuichi Ohta, Mikiya Sato, Yoshinori Ryu, Jun Kitayuguchi, Tetsuhiro Maeno, Chiaki Sano
BMC health services research 21(1) 640-640 2021 年 7 月 3 日
21．Comprehensive Care through Family Medicine: Improving the Sustainability of Aging
Societies.
Ryuichi Ohta, Akinori Ueno, Jun Kitayuguchi, Yoshihiro Moriwaki, Jun Otani, Chiaki Sano
Geriatrics (Basel, Switzerland) 6(2) 2021 年 6 月 4 日
22．Challenges and solutions in nurse practitioners’ work for interprofessional collaboration atrural community hospitals: The grounded theory approach
Ryuichi Ohta, Satoko Maejima
Journal of Interprofessional Education and Practice 23 2021 年 6 月
23．White Nail as a Static Physical Finding: Revitalization of Physical Examination
Ryuichi Ohta, Chiaki Sano

CLINICS AND PRACTICE 11(2) 241-245 2021 年 6 月
24 ． Effects of Implementation of Infection Control Measures against COVID-19 on theCondition of Japanese Rural Nursing Homes
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(11) 2021 年 6 月
25．Rural Social Participation through Osekkai during the COVID-19 Pandemic
Ryuichi Ohta, Akiko Yata, Yuki Arakawa, Koichi Maiguma, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(11) 2021 年 6 月
26．Family Medicine Education at a Rural Hospital in Japan: Impact on Institution and Trainees
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(11) 2021 年 6 月
27．Overcoming the challenge of COVID-19: A grounded theory approach to rural nurses'
experiences
Ryuichi Ohta, Yaeko Matsuzaki, Satomi Itamochi
JOURNAL OF GENERAL AND FAMILY MEDICINE 22(3) 134-140 2021 年 5 月
28．Fears Related to COVID-19 among Rural Older People in Japan
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
HEALTHCARE 9(5) 2021 年 5 月
29．Association between transient appetite loss and vitamin B1 deficiency in elderly patientswith suspected deficiency
Ryuichi Ohta, Yoshinori Ryu, Shuzo Hattori
JOURNAL OF GENERAL AND FAMILY MEDICINE 22(3) 128-133 2021 年 5 月
30．Elliptical shadow on the cervical spinal cord
Nozomi Nishikura, Ryuichi Ohta, Chiaki Sano
JOURNAL OF GENERAL AND FAMILY MEDICINE 22(3) 158-159 2021 年 5 月

31．The effect of social fear on the establishment of fever standards in rural hospitals during thecoronavirus disease (COVID-19) pandemic.
Ryuichi Ohta, Hirotaka Ikeda
Journal of rural medicine : JRM 16(2) 126-127 2021 年 4 月
32．The importance of patient-centered care during the COVID-19 pandemic: lessons from arural ward in Japan.
Ryuichi Ohta, Hirotaka Ikeda, Junpei Sawa
Journal of rural medicine : JRM 16(2) 128-129 2021 年 4 月
33．The Implementation of a Clinical Ladder in Rural Japanese Nursing Education: Effectivenessand Challenges
Satoko Maejima, Ryuichi Ohta, Chiaki Sano
HEALTHCARE 9(4) 2021 年 4 月
34．Realist evaluation of interprofessional education in primary care through transprofessionalrole play: what primary care professionals learn together
Ryuichi Ohta, Yoshinori Ryu, Manabu Yoshimura
EDUCATION FOR PRIMARY CARE 32(2) 91-99 2021 年 3 月
35 ． The revitalization of "Osekkai": How the COVID-19 pandemic has emphasized theimportance of Japanese voluntary social work
Ryuichi Ohta, Akiko YataQUALITATIVE SOCIAL WORK 20(1-2) 423-432 2021 年 3 月
36．Being a family medicine resident in the United States
Kaku Kuroda, Ryuichi Ohta, R. Eugene Bailey
JOURNAL OF GENERAL AND FAMILY MEDICINE 22(2) 107-108 2021 年 3 月
37．Impact of COVID-19 on the analytical diagnosing ability of family medicine residentsRyuichi Ohta, Nozomi Nishikura, Chiaki Sano
JOURNAL OF GENERAL AND FAMILY MEDICINE 22(2) 109-110 2021 年 3 月

38 ． The Contribution of Citizens to Community-Based Medical Education in Japan: A
Systematic Review
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(4) 1-16 2021 年 2 月
39．The Smiles of Older People through Recreational Activities: Relationship between Smilesand Joy
Ryuichi Ohta, Megumi Nishida, Nobuyasu Okuda, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(4) 1-8 2021 年 2 月
40．Risk of Hospital Readmission among Older Patients Discharged from the Rehabilitation
Unit in a Rural Community Hospital: A Retrospective Cohort Study
Ryuichi Ohta, Chiaki Sano
JOURNAL OF CLINICAL MEDICINE 10(4) 1-11 2021 年 2 月
41．The Uncertainty of COVID-19 Inducing Social Fear and Pressure on the Continuity of Rural,
Community-Based Medical Education: A Thematic Analysis
Ryuichi Ohta, Yoshinori Ryu, Chiaki Sano
HEALTHCARE 9(2) 2021 年 2 月
42．Educational Intervention to Improve Citizen's Healthcare Participation Perception in Rural
Japanese Communities: A Pilot Study
Ryuichi Ohta, Yoshinori Ryu, Jun Kitayuguchi, Chiaki Sano, Karen D. Konings
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(4) 1-11 2021 年 2 月
43．Rare-Earth-Mediated Optomechanical System in the Reversed Dissipation Regime.
Ryuichi Ohta, Loïc Herpin, Victor M Bastidas, Takehiko Tawara, Hiroshi Yamaguchi, HajimeOkamoto
Physical review letters 126(4) 047404-047404 2021 年 1 月 29 日
44．Author reply to what are the clinical signs of thiamine deficiency in elderly patients?
Ryuichi Ohta, Yoshinori Ryu, Shuzo Hattori, Chiaki Sano
Journal of General and Family Medicine 2021 年

45．Critical values of learning to speak English for Japanese clinicians
Kaku Kuroda, Ryuichi Ohta, R. Eugene Bailey
Journal of General and Family Medicine 2021 年
46．Sources of anxiety in young rural physicians working alone on remote islands: A qualitative
study
Kaku Kuroda, Moe Kuroda, Ryuichi Ohta
Journal of General and Family Medicine 2021 年
47．Systematic scoping review of factors and measures of rurality: toward the development of arurality index for health care research in Japan
Makoto Kaneko, Ryuichi Ohta, Evelyn Vingilis, Maria Mathews, Thomas Robert Freeman
BMC HEALTH SERVICES RESEARCH 21(1) 9-9 2021 年 1 月
48．Predicting factors of elderly patients' discharge to home after rehabilitation in rural Japan:
a retrospective cohort study
Ryuichi Ohta, Natsumi Maeki, Sokichi Maniwa, Koichi Miyakoshi
RURAL AND REMOTE HEALTH 21(1) 6406-6406 2021 年
49．Effectiveness and Challenges in Local Self-Governance: Multifunctional Autonomy in Japan
Ryuichi Ohta, Yoshinori Ryu, Daisuke Kataoka, Chiaki Sano
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLICHEALTH 18(2) 1-14 2021 年 1 月
50．Strengths and Challenges for Medical Students and Residents in Rural Japan
Ryuichi Ohta, Yoshinori Ryu, Takuji Katsube, Yoshihiro Moriwaki, Jun Otani
FAMILY MEDICINE 53(1) 32-38 2021 年 1 月
51．Improvement in palliative care quality in rural nursing homes through information andcommunication technology-driven interprofessional collaboration
Ryuichi Ohta, Yoshinori Ryu
RURAL AND REMOTE HEALTH 21(2) 6450-6450 2021 年