Tokumasu, Kazuki - OU Author List - OKAYAMA UNIVERSITY SCIENTIFIC ACHIEVEMENT REPOSITORY

Phase-dependent trends in the prevalence of myalgic encephalomyelitis / chronic fatigue syndrome (ME/CFS) related to long COVID: A criteria-based retrospective study in Japan

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Author	Morita, Satoru\| Tokumasu, Kazuki\| Otsuka, Yuki\| Honda, Hiroyuki\| Nakano, Yasuhiro\| Sunada, Naruhiko\| Sakurada, Yasue\| Matsuda, Yui\| Soejima, Yoshiaki\| Ueda, Keigo\| Otsuka, Fumio\|
Published Date	2024-12-09
Publication Title	PLoS ONE
Volume	volume19
Issue	issue12
Publisher	Public Library of Science
Start Page	e0315385
ISSN	1932-6203
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 Morita et al.
File Version	publisher
PubMed ID	39652555
DOI	10.1371/journal.pone.0315385
Web of Science KeyUT	001373564500009
Related Url	isVersionOf https://doi.org/10.1371/journal.pone.0315385

Postgraduate Year Two Medical Residents' Awareness of Personal Development as a Physician during the Management of Inpatients: A Qualitative Study

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Author	Tokumasu, Kazuki\| Obara, Haruo\| Hirosawa, Takanobu\| Ogawa, Hiroko\| Otsuka, Fumio\|
Keywords	autonomy personal development personal growth qualitative study responsibility
Published Date	2024-08-14
Publication Title	Healthcare
Volume	volume12
Issue	issue16
Publisher	MDPI
Start Page	1621
ISSN	2227-9032
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by the authors.
File Version	publisher
PubMed ID	39201179
DOI	10.3390/healthcare12161621
Web of Science KeyUT	001304820900001
Related Url	isVersionOf https://doi.org/10.3390/healthcare12161621

Importance of Blood Glucose Measurement for Predicting the Prognosis of Long COVID: A Retrospective Study in Japan

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Author	Yokoyama, Sho\| Honda, Hiroyuki\| Otsuka, Yuki\| Tokumasu, Kazuki\| Nakano, Yasuhiro\| Sakurada, Yasue\| Matsuda, Yui\| Sunada, Naruhiko\| Hasegawa, Toru\| Takase, Ryosuke\| Omura, Daisuke\| Soejima, Yoshiaki\| Ueda, Keigo\| Kishida, Masayuki\| Otsuka, Fumio\|
Keywords	blood glucose diabetes mellitus long COVID omicron variant post-COVID-19 condition
Published Date	2024-07-13
Publication Title	Journal of Clinical Medicine
Volume	volume13
Issue	issue14
Publisher	MDPI
Start Page	4099
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by the authors.
File Version	publisher
PubMed ID	39064139
DOI	10.3390/jcm13144099
Web of Science KeyUT	001278836700001
Related Url	isVersionOf https://doi.org/10.3390/jcm13144099

Clinical and endocrine features of orthostatic intolerance detected in patients with long COVID

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Author	Kato, Atsushi\| Tokumasu, Kazuki\| Yamamoto, Koichiro\| Otsuka, Yuki\| Nakano, Yasuhiro\| Honda, Hiroyuki\| Sunada, Naruhiko\| Sakurada, Yasue\| Matsuda, Yui\| Hasegawa, Toru\| Takase, Ryosuke\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	Active standing test Long COVID Orthostatic intolerance Post COVID-19 condition Postural orthostatic tachycardia syndrome (POTS)
Published Date	2024-07-24
Publication Title	Scientific Reports
Volume	volume14
Issue	issue1
Publisher	Nature Portfolio
Start Page	17025
ISSN	2045-2322
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2024
File Version	publisher
PubMed ID	39043760
DOI	10.1038/s41598-024-67815-y
Web of Science KeyUT	001275757700007
Related Url	isVersionOf https://doi.org/10.1038/s41598-024-67815-y

Changes in Working Situations of Employed Long COVID Patients: Retrospective Study in Japanese Outpatient Clinic

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Author	Matsuda, Yui\| Sakurada, Yasue\| Otsuka, Yuki\| Tokumasu, Kazuki\| Nakano, Yasuhiro\| Sunada, Naruhiko\| Honda, Hiroyuki\| Hasegawa, Toru\| Takase, Ryosuke\| Omura, Daisuke\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	employment job retirement leave of absence long COVID omicron variant post-COVID-19 condition
Published Date	2024-06-28
Publication Title	Journal of Clinical Medicine
Volume	volume13
Issue	issue13
Publisher	MDPI
Start Page	3809
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by the authors.
File Version	publisher
PubMed ID	38999375
DOI	10.3390/jcm13133809
Web of Science KeyUT	001269802900001
Related Url	isVersionOf https://doi.org/10.3390/jcm13133809

Occult endocrine disorders newly diagnosed in patients with post-COVID-19 symptoms

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Author	Nakano, Yasuhiro\| Sunada, Naruhiko\| Tokumasu, Kazuki\| Honda, Hiroyuki\| Otsuka, Yuki\| Sakurada, Yasue\| Matsuda, Yui\| Hasegawa, Toru\| Omura, Daisuke\| Ochi, Kanako\| Yasuda, Miho\| Hagiya, Hideharu\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	Diabetes mellitus Endocrine disorders Long COVID Metabolic disorders Thyroid disease
Note	The version of record of this article, first published in Scientific Reports, is available online at Publisher’s website: http://dx.doi.org/10.1038/s41598-024-55526-3\|
Published Date	2024-03-05
Publication Title	Scientific Reports
Volume	volume14
Issue	issue1
Publisher	Nature Portfolio
Start Page	5446
ISSN	2045-2322
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2024
File Version	publisher
PubMed ID	38443459
DOI	10.1038/s41598-024-55526-3
Web of Science KeyUT	001180457200009
Related Url	isVersionOf https://doi.org/10.1038/s41598-024-55526-3

Characteristics of Functional Hyperthermia Detected in an Outpatient Clinic for Fever of Unknown Origin

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Author	Oka, Kosuke\| Tokumasu, Kazuki\| Hagiya, Hideharu\| Otsuka, Fumio\|
Keywords	C-reactive protein (CRP) fever of unknown origin (FUO) functional hyperthermia (FH) psychiatric disorder psychogenic fever
Published Date	2024-02-03
Publication Title	Journal of Clinical Medicine
Volume	volume13
Issue	issue3
Publisher	MDPI
Start Page	889
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by the authors.
File Version	publisher
PubMed ID	38337583
DOI	10.3390/jcm13030889
Web of Science KeyUT	001159108700001
Related Url	isVersionOf https://doi.org/10.3390/jcm13030889

Clinical characteristics of female long COVID patients with menstrual symptoms: a retrospective study from a Japanese outpatient clinic

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Author	Sakurada, Yasue\| Matsuda, Yui\| Motohashi, Kanon\| Hasegawa, Toru\| Otsuka, Yuki\| Nakano, Yasuhiro\| Tokumasu, Kazuki\| Yamamoto, Koichiro\| Sunada, Naruhiko\| Honda, Hiroyuki\| Hagiya, Hideharu\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	Depression fatigue menstrual symptoms omicron variant post-COVID-19 condition
Published Date	2024-01-25
Publication Title	Journal of Psychosomatic Obstetrics & Gynecology
Volume	volume45
Issue	issue1
Publisher	Taylor and Francis
Start Page	2305899
ISSN	0167-482X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 The Author(s).
File Version	publisher
PubMed ID	38270210
DOI	10.1080/0167482X.2024.2305899
Web of Science KeyUT	001148717900001
Related Url	isVersionOf https://doi.org/10.1080/0167482X.2024.2305899

Relevance of complement immunity with brain fog in patients with long COVID

Author	Hagiya, Hideharu\| Tokumasu, Kazuki\| Otsuka, Yuki\| Sunada, Naruhiko\| Nakano, Yasuhiro\| Honda, Hiroyuki\| Furukawa, Masanori\| Otsuka, Fumio\|
Keywords	Complement immunity Complement system Coronavirus disease 2019 Inflammation
Note	© 2023 Japanese Society of Chemotherapy, Japanese Association for Infectious Diseases, and Japanese Society for Infection Prevention and Control. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/\| This fulltext file will be available in Feb. 2025.\|
Published Date	2024-03
Publication Title	Journal of Infection and Chemotherapy
Volume	volume30
Issue	issue3
Publisher	Elsevier
Start Page	236
End Page	241
ISSN	1341-321X
NCID	AA11057978
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 Japanese Society of Chemotherapy, Japanese Association for Infectious Diseases, and Japanese Society for Infection Prevention and Control.
File Version	author
PubMed ID	37866620
DOI	10.1016/j.jiac.2023.10.016
Web of Science KeyUT	001167908700001
Related Url	isVersionOf https://doi.org/10.1016/j.jiac.2023.10.016

Characteristics of Persistent Symptoms Manifested after SARS-CoV-2 Vaccination: An Observational Retrospective Study in a Specialized Clinic for Vaccination-Related Adverse Events

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Author	Tokumasu, Kazuki\| Fujita-Yamashita, Manami\| Sunada, Naruhiko\| Sakurada, Yasue\| Yamamoto, Koichiro\| Nakano, Yasuhiro\| Matsuda, Yui\| Otsuka, Yuki\| Hasegawa, Toru\| Hagiya, Hideharu\| Honda, Hiroyuki\| Otsuka, Fumio\|
Keywords	adverse events COVID-19 SARS-CoV-2 vaccination mRNA vaccine
Published Date	2023-10-30
Publication Title	Vaccines
Volume	volume11
Issue	issue11
Publisher	MDPI
Start Page	1661
ISSN	2076-393X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	38005993
DOI	10.3390/vaccines11111661
Web of Science KeyUT	001113977600001
Related Url	isVersionOf https://doi.org/10.3390/vaccines11111661

Utility of Serum Ferritin for Predicting Myalgic Encephalomyelitis/Chronic Fatigue Syndrome in Patients with Long COVID

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Author	Yamamoto, Yukichika\| Otsuka, Yuki\| Tokumasu, Kazuki\| Sunada, Naruhiko\| Nakano, Yasuhiro\| Honda, Hiroyuki\| Sakurada, Yasue\| Hasegawa, Toru\| Hagiya, Hideharu\| Otsuka, Fumio\|
Keywords	COVID-19 ferritin insulin-like growth factor-I (IGF-I) long COVID myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)
Published Date	2023-07-18
Publication Title	Journal of Clinical Medicine
Volume	volume12
Issue	issue14
Publisher	MDPI
Start Page	4737
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	37510852
DOI	10.3390/jcm12144737
Web of Science KeyUT	001035871200001
Related Url	isVersionOf https://doi.org/10.3390/jcm12144737

Manifestation of Headache Affecting Quality of Life in Long COVID Patients

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Author	Fujita, Kana\| Otsuka, Yuki\| Sunada, Naruhiko\| Honda, Hiroyuki\| Tokumasu, Kazuki\| Nakano, Yasuhiro\| Sakurada, Yasue\| Obika, Mikako\| Hagiya, Hideharu\| Otsuka, Fumio\|
Keywords	COVID-19 aftercare clinic (CAC) headache quality of life (QOL) long COVID post COVID-19 condition (PCC)
Published Date	2023-05-18
Publication Title	Journal of Clinical Medicine
Volume	volume12
Issue	issue10
Publisher	MDPI
Start Page	3533
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	37240639
DOI	10.3390/jcm12103533
Web of Science KeyUT	000997859300001
Related Url	isVersionOf https://doi.org/10.3390/jcm12103533

Symptomatic Characteristics of Hypozincemia Detected in Long COVID Patients

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Author	Matsuda, Yui\| Tokumasu, Kazuki\| Otsuka, Yuki\| Sunada, Naruhiko\| Honda, Hiroyuki\| Sakurada, Yasue\| Nakano, Yasuhiro\| Hasegawa, Toru\| Obika, Mikako\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	dysgeusia dysosmia fatigue hypozincemia long COVID
Published Date	2023-03-06
Publication Title	Journal of Clinical Medicine
Volume	volume12
Issue	issue5
Publisher	MDPI
Start Page	2062
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	36902849
DOI	10.3390/jcm12052062
Web of Science KeyUT	000947564300001
Related Url	isVersionOf https://doi.org/10.3390/jcm12052062

Trends in Long COVID Symptoms in Japanese Teenage Patients

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Author	Sakurada, Yasue\| Otsuka, Yuki\| Tokumasu, Kazuki\| Sunada, Naruhiko\| Honda, Hiroyuki\| Nakano, Yasuhiro\| Matsuda, Yui\| Hasegawa, Toru\| Ochi, Kanako\| Hagiya, Hideharu\| Ueda, Keigo\| Kataoka, Hitomi\| Otsuka, Fumio\|
Keywords	Delta variant schoolchildren teenagers Omicron variant post-COVID-19 condition
Published Date	2023-01-29
Publication Title	Medicina
Volume	volume59
Issue	issue2
Publisher	MDPI
Start Page	261
ISSN	1010-660X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	36837463
DOI	10.3390/medicina59020261
Web of Science KeyUT	000940850700001
Related Url	isVersionOf https://doi.org/10.3390/medicina59020261

Differences in Stress Perception of Medical Students Depending on In-Person Communication and Online Communication during the COVID-19 Pandemic: A Japanese Cross-Sectional Survey

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Author	Tokumasu, Kazuki\| Nishimura, Yoshito\| Sakamoto, Yoko\| Obika, Mikako\| Kataoka, Hitomi\| Otsuka, Fumio\|
Keywords	COVID-19 medical student medical education in-person communication online communication stress perception
Published Date	2023-01-15
Publication Title	International Journal of Environmental Research and Public Health
Volume	volume20
Issue	issue2
Publisher	MDPI
Start Page	1579
ISSN	1660-4601
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2023 by the authors.
File Version	publisher
PubMed ID	36674333
DOI	10.3390/ijerph20021579
Web of Science KeyUT	000915112800001
Related Url	isVersionOf https://doi.org/10.3390/ijerph20021579

Characteristics of Sleep Disturbance in Patients with Long COVID: A Retrospective Observational Study in Japan

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Author	Sunada, Naruhiko\| Nakano, Yasuhiro\| Otsuka, Yuki\| Tokumasu, Kazuki\| Honda, Hiroyuki\| Sakurada, Yasue\| Matsuda, Yui\| Hasegawa, Toru\| Omura, Daisuke\| Ochi, Kanako\| Hagiya, Hideharu\| Ueda, Keigo\| Kataoka, Hitomi\| Otsuka, Fumio\|
Keywords	insomnia myalgic encephalomyelitis chronic fatigue long COVID Omicron variant post COVID-19 condition
Published Date	2022-12-09
Publication Title	Journal Of Clinical Medicine
Volume	volume11
Issue	issue24
Publisher	MDPI
Start Page	7332
ISSN	2077-0383
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2022 by the authors.
File Version	publisher
PubMed ID	36555948
DOI	10.3390/jcm11247332
Web of Science KeyUT	000901154300001
Related Url	isVersionOf https://doi.org/10.3390/jcm11247332

Transitional Changes in Fatigue-Related Symptoms Due to Long COVID: A Single-Center Retrospective Observational Study in Japan

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Author	Nakano, Yasuhiro\| Otsuka, Yuki\| Honda, Hiroyuki\| Sunada, Naruhiko\| Tokumasu, Kazuki\| Sakurada, Yasue\| Matsuda, Yui\| Hasegawa, Toru\| Ochi, Kanako\| Hagiya, Hideharu\| Kataoka, Hitomi\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	dysgeusia dysosmia myalgic encephalomyelitis/chronic fatigue syndrome Omicron variant and post COVID-19 condition
Published Date	2022-10-05
Publication Title	Medicina-Lithuania
Volume	volume58
Issue	issue10
Publisher	MDPI
Start Page	1393
ISSN	1010-660X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2022 by the authors.
File Version	publisher
PubMed ID	36295554
DOI	10.3390/medicina58101393
Web of Science KeyUT	000875069800001
Related Url	isVersionOf https://doi.org/10.3390/medicina58101393

Clinical Characteristics of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) Diagnosed in Patients with Long COVID

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Author	Tokumasu, Kazuki\| Honda, Hiroyuki\| Sunada, Naruhiko\| Sakurada, Yasue\| Matsuda, Yui\| Yamamoto, Koichiro\| Nakano, Yasuhiro\| Hasegawa, Toru\| Yamamoto, Yukichika\| Otsuka, Yuki\| Hagiya, Hideharu\| Kataoka, Hitomi\| Ueda, Keigo\| Otsuka, Fumio\|
Keywords	general fatigue post-exertional malaise long COVID myalgic encephalomyelitis chronic fatigue syndrome post COVID-19 condition
Published Date	2022-06-25
Publication Title	Medicina
Volume	volume58
Issue	issue7
Publisher	MDPI
Start Page	850
ISSN	1010-660X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2022 by the authors.
File Version	publisher
PubMed ID	35888568
DOI	10.3390/medicina58070850
Web of Science KeyUT	000834490500001
Related Url	isVersionOf https://doi.org/10.3390/medicina58070850

Application of Kampo Medicines for Treatment of General Fatigue Due to Long COVID

FullText URL	fulltext.pdf
Author	Tokumasu, Kazuki\| Ueda, Keigo\| Honda, Hiroyuki\| Sunada, Naruhiko\| Sakurada, Yasue\| Matsuda, Yui\| Nakano, Yasuhiro\| Hasegawa, Toru\| Otsuka, Yuki\| Obika, Mikako\| Hagiya, Hideharu\| Kataoka, Hitomi\| Otsuka, Fumio\|
Keywords	general fatigue herbal medicine Kampo medicine long COVID
Published Date	2022-05-28
Publication Title	Medicina
Volume	volume58
Issue	issue6
Publisher	MDPI
Start Page	730
ISSN	1010-660X
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2022 by the authors.
File Version	publisher
PubMed ID	35743993
DOI	10.3390/medicina58060730
Web of Science KeyUT	000818259300001
Related Url	isVersionOf https://doi.org/10.3390/medicina58060730

Interest in Infectious Diseases specialty among Japanese medical students amidst the COVID-19 pandemic: A web-based, cross-sectional study

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Author	Hagiya, Hideharu\| Otsuka, Yuki\| Tokumasu, Kazuki\| Honda, Hiroyuki\| Nishimura, Yoshito\| Obika, Mikako\| Otsuka, Fumio\|
Published Date	2022-04-21
Publication Title	PLOS ONE
Volume	volume17
Issue	issue4
Publisher	Public Library Science
Start Page	e0267587
ISSN	1932-6203
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2022 Hagiya et al.
File Version	publisher
PubMed ID	35446911
DOI	10.1371/journal.pone.0267587
Web of Science KeyUT	000795468200022
Related Url	isVersionOf https://doi.org/10.1371/journal.pone.0267587