Education 【 display / non-display 】

Education 【 display / non-display 】

• 2011

  -

  2013

  Sapporo Medical University   Graduate School of Health Sciences   神経・精神機能学分野  

• 2009

  -

  2011

  Sapporo Medical University   Graduate School of Health Sciences   地域リハビリテーション分野  

Degree 【 display / non-display 】

Degree 【 display / non-display 】

• 2013.03   Sapporo Medical University   博士

Research Experience 【 display / non-display 】

Research Experience 【 display / non-display 】

• 2024.04

  -

  Now

  Sapporo Medical University   School of Health Sciences Department of Physical Therapy   准教授

• 2022.04

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  Now

  National Cancer Center   がん対策研究所 疫学研究部   外来研究員

• 2022.04

  -

  2024.03

  Sapporo Medical University   School of Health Sciences Department of Physical Therapy   講師

• 2020.04

  -

  2022.03

  国立がん研究センター 社会と健康研究センター コホート研究部 研究員  

• 2019.10

  -

  2020.03

  National Cancer Center   Epidemiology Division, Center for Public Health Sciences   Researcher

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Professional Memberships 【 display / non-display 】

Professional Memberships 【 display / non-display 】

• 2020

  -

  Now

  日本癌学会

• 2018

  -

  Now

  日本運動疫学会

• 2016

  -

  Now

  JAPAN EPIDEMIOLOGICAL ASSOCIATION

• 2015

  -

  Now

  JAPANESE SOCIETY OF PUBLIC HEALTH

• 　

  　

  　

  JAPANESE PHYSICAL THERAPY ASSOCIATION

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

• Life sciences   Hygiene and public health (non-laboratory)  

• Life sciences   Rehabilitation science  

Affiliation 【 display / non-display 】

Affiliation 【 display / non-display 】

• Sapporo Medical University   School of Health Sciences Department of Physical Therapy   准教授  

Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

• 疫学

• 理学療法

• 地域・生活環境

• 高齢者

• がん疫学

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Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Reactive stepping behavior during dual tasking is related to falls in community-dwelling older adults: A cross-sectional study.

  Hideyuki Tashiro, Sota Hirosaki, Yui Sato, Hikaru Ihira, Megumi Toki, Naoki Kozuka

  Clinical biomechanics (Bristol, Avon)   125   106536 - 106536  2025.05  [International journal]

  　View Summary

  BACKGROUND: We investigated whether reactive stepping during dual tasking is associated with falls in community-dwelling older adults. METHODS: In 78 healthy community-dwelling older adults, we evaluated quiet standing stability, limits of stability, and reactive stepping performance during single and dual tasking. Participants were suspended in a forward-leaning position using a lean control cable with a load of 12 % of their body weight and were instructed to regain balance upon release by taking steps forward. Reactive stepping was induced under two conditions: (1) simple front-fixed gaze (single-task condition) and (2) reading color names written in different colors (dual-task condition). Reactive stepping performance was measured using the onset latency of the medial gastrocnemius of the stepping limb and the number of steps required to recover balance after forward balance loss. Participants were classified as fallers or non-fallers based on fall history during the past 12 months. FINDINGS: Twenty-two participants were classified as fallers. Both fallers and non-fallers exhibited a significantly increased number of steps during dual-tasking compared to the single-task condition. An interaction between group and condition was observed. The increased number of steps to balance recovery from forward balance loss during dual-tasking was significantly associated with falls after controlling for age, sex, body mass, cognitive function, and concerns about falling. INTERPRETATION: The number of steps taken to recover balance during dual-tasking was independently related to fall history in community-dwelling older adults. Fall prevention strategies for older adults should include measuring and improving their response to balance loss while dual tasking.

  DOI PubMed

• Early Detection and Remote Care of Frailty for Older Adults Living in Sparsely Populated Rural Areas in Hokkaido, Japan: A Case Study.

  Kazuki Yokoyama, Shuhei Fukagawa, Hideyuki Tashiro, Hajime Toda, Takuto Kida, Lin Takahashi, Atsushi Mizumoto, Keitaro Makino, Kaori Yokoyama, Tomomi Akanuma, Satoshi Kondo, Hikaru Ihira

  Cureus   17 ( 5 ) e84194  2025.05  [International journal]

  　View Summary

  The global increase in the number of older people aged 65 and over is causing concern in healthcare and social systems. The lack of health and welfare services and human resources may delay the assessment of frailty and other geriatric syndromes. However, the participation in community-led frailty check-ups remains low, and there are limitations in providing a preventive home visit approach to all residents. Therefore, efficient remote frailty assessment and care systems to support older people in sparsely populated rural areas are needed. This case study investigated the efficacy of an artificial intelligence (AI)-assisted monitoring system coupled with remote multidisciplinary care in addressing frailty among older adults in a depopulated region of Hokkaido, Japan. An 85-year-old woman, residing in a sparsely populated rural city with a significantly high aging rate, was assessed for frailty using the revised Japanese version of the Cardiovascular Health Study criteria. In addition, three aspects of frailty were assessed: physical frailty, cognitive/psychological frailty, and social frailty. Baseline assessments indicated prefrailty, diminished mobility, depressive symptoms, low subjective well-being, and social isolation. An AI-assisted monitoring camera was installed in the participant's living space to provide continuous behavioral analysis. Based on the abovementioned information, multidisciplinary remote care was provided. Over two months, the system identified mobility challenges and prolonged sedentary behaviors, despite no falls or emergencies. In remote care, multidisciplinary teams suggest exercises and environmental adjustments to improve physical activity and activities of daily living, as well as social participation to maintain a sense of purpose and roles in life. Through these interventions, three months after baseline, while her physical frailty progressed, her psychological well-being and social emotional support showed improvements. Notably, she expressed a sense of security with the presence of the monitoring system and appreciated the remote care advice, highlighting its role in alleviating feelings of isolation. This case demonstrates the potential of integrating an AI-assisted monitoring system with remote care to mitigate the multi-dimensional effects of frailty in aging populations, particularly in regions facing disparities in healthcare access. Our findings suggest that such systems can provide valuable insights into daily behaviors, facilitate tailored interventions, and foster a sense of safety among older adults living in sparsely populated rural areas.

  DOI PubMed

• Birth cohort-specific smoking patterns in Japan (1906-2004): a population-based study from the NC-CCAPH consortium.

  Shiori Tanaka, Hikaru Ihira, Tetsuya Tajima, Rieko Kanehara, Yosuke Inoue, Takehiko Doi, Nozomu Kobayashi, Yuka Kato, Yukiko Nishita, Maki Konishi, Yoko M Nakao, Isamu Kabe, Chihiro Morioka, Seitaro Dohi, Paramita Khairan, Ahmed Arafa, Zui C Narita, Naho Morisaki, Yukai Lu, Rei Otsuka, Taiki Yamaji, Hiroyuki Shimada, Tetsuya Mizoue, Norie Sawada, Shoichiro Tsugane, Motoki Iwasaki, Manami Inoue

  The Lancet regional health. Western Pacific   58   101562 - 101562  2025.05  [International journal]

  　View Summary

  BACKGROUND: This study aimed to estimate Japan's age-specific history of smoking prevalence, initiation, cessation, and intensity by birth cohort, using data from multiple cohort studies. METHODS: We pooled data from eight eligible cohorts surveyed between 1989 and 2020 as part of the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH). An Age-Period-Cohort model was employed to estimate birth cohort- and sex-specific smoking patterns for individuals born between 1920 and 1999. FINDINGS: Among 393,023 participants (40.9% female, mean age 51.8 years), smoking prevalence peaked in early adulthood (20s-30s) and declined with increasing age. Recent birth cohorts showed lower prevalence and smoking initiation in both sexes, albeit with increases in mid-female cohorts (1960s-1980s). Smoking cessation surged in the late 1990s and peaked around 2010, coinciding with tax-driven cigarette price hikes. Peak cigarette consumption occurred in 1990, followed by a steady decline. However, all birth cohorts maintained a mean consumption above 10 cigarettes smoked per day for both sexes. INTERPRETATION: This study highlights a generational shift in smoking behavior, in which younger birth cohorts smoked less and quit earlier than older birth cohorts. The study also reveals that smoking behaviors in males were strongly influenced by cigarette accessibility, such as price increases, while smoking initiation in females was more likely affected by societal changes, especially in the evolving roles of women. Smoking intensity remained stable across cohorts and sexes, emphasizing the need for stronger health policies, including higher tobacco taxes, to further reduce smoking and its health impact. FUNDING: This study was conducted within the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH) and supported by grants from the Japan Health Research Promotion Bureau (JH) (2019-(1)-1, 2024-B-05).

  DOI PubMed

• Association Between Occupational Participation and Quality of Life in Japanese Older Adults

  Suguru Shimokihara, Kazuki Yokoyama, Hikaru Ihira, Yuriko Matsuzaki-Kihara, Atsushi Mizumoto, Hideyuki Tashiro, Hidekazu Saito, Keitaro Makino, Kiyotaka Shimada, Kosuke Yama, Ryo Miyajima, Takeshi Sasaki, Nozomu Ikeda

  OTJR: Occupational Therapy Journal of Research ( SAGE Publications )    15394492251327983 - 15394492251327983  2025.03  [International journal]

  　View Summary

  Positive associations between occupational participation and quality of life (QoL) are known in various populations, but there are few reports in older adults in Japan. To quantify the association between occupational participation in meaningful occupations and QoL among Japanese community-dwelling older adults. A self-administered questionnaire was sent to 626 older adults. QoL was assessed using the World Health Organization (WHO)-five well-being index, and occupational participation in meaningful occupations was measured with the self-administered occupational performance index. The association between occupational participation and QoL was analyzed. Among 367 participants, significant associations were found between occupational participation in meaningful occupations and QoL. In addition, participants with lower QoL exhibited lower levels of occupational participation in occupational control, occupational balance, and satisfaction of performance domains. There is a positive association between occupational participation and QoL among Japanese older adults. Occupational therapists should prioritize occupational participation to support the well-being of older adults.

  DOI PubMed

• Association Between the Use of Information and Communication Technology Tools and Each Domain of Cognitive Function Among Community-Dwelling Older Adults: A Prospective Cohort Study

  Kazuki Yokoyama, Hikaru Ihira, Suguru Shimokihara, Yuriko Matsuzaki-Kihara, Atsushi Mizumoto, Hideyuki Tashiro, Hidekazu Saito, Keitaro Makino, Shunpei Katsuura, Kiyotaka Shimada, Kosuke Yama, Ryo Miyajima, Takeshi Sasaki, Nozomu Ikeda

  Cureus ( Springer Science and Business Media LLC )  17 ( 2 ) e79188  2025.02  [International journal]

  　View Summary

  BACKGROUND: This study aimed to determine the association between the use of information and communication technology (ICT) tools, such as mobile voice calling, e-mail, and video calling, and cognitive function among community-dwelling older adults. METHODS: For the 220 included participants aged ≥65 years, baseline surveys conducted from 2017 to 2018 assessed demographics. Additionally, cognitive function domains were evaluated using the Word List Memory Task, Trail Making Test, and Symbol Digit Substitution Task on a tablet PC. Later, in 2021, follow-up mail surveys assessed the use of ICT tools, including mobile voice calling, e-mail, and video calling. RESULTS: Multivariate-adjusted logistic regression models revealed that a higher Symbol Digit Substitution Task score was significantly associated with the use of mobile voice calling (odds ratio [OR] = 1.07, 95% confidence interval [CI]: 1.02-1.13), e-mail (OR = 1.09, 95% CI: 1.04-1.15), and video calling (OR = 1.04, 95% CI: 1.003-1.09) after adjusting for covariates. CONCLUSIONS:  This study's findings suggest that processing speed may be related to the use of the three ICT tools assessed in this study among community-dwelling older adults, regardless of tool type. The use of these ICT tools may be challenging for older adults with decreased processing speed. Therefore, preventive interventions should include early recognition of the decline in processing speed and implementation of strategies to compensate for reduced processing speed, such as simplifying processes and habituation procedures, to enable the use of ICT tools by older adults.

  DOI PubMed

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Books and Other Publications 【 display / non-display 】

Books and Other Publications 【 display / non-display 】

• 高齢者理学療法

  井平 光( Part： Contributor, 5章 疾患における高齢者理学療法)

  医歯薬出版  2017

• フレイルの予防とリハビリテーション

  Ihira Hikaru( Part： Contributor, フレイル予防の実践例から学ぶ)

  医歯薬出版株式会社  2015.09

• 運動による脳の制御－認知症予防のための運動－

  Ihira Hikaru( Part： Contributor, 第2章 認知症の発症メカニズムと予防（改善）のメカニズム)

  杏林書院  2015.07

• 基礎からわかる軽度認知障害（MCI）－効果的な認知庄予防を目指して－

  井平 光( Part： Contributor, 第3章 MCIの認知機能の特徴)

  医学書院  2015.04

• サルコペニアと運動 エビデンスと実践

  井平 光( Part： Contributor, 急性期患者におけるサルコペニアの運動療法)

  医歯薬出版株式会社  2014.05

Misc 【 display / non-display 】

Misc 【 display / non-display 】

• 地域在住高齢者のがん罹患に関する自己報告の妥当性検証

  井平 光, 牧野 圭太郎, 木原 由里子, 志水 宏太郎, 山口 亨, 伊藤 一成, 田井 啓太, 牧迫 飛雄馬, 島田 裕之, 古名 丈人

  理学療法学 ( (公社)日本理学療法士協会 )  44 ( Suppl.2 ) P - 1  2017.04

• 外来化学療法を施行中の進行性がん患者に対する理学療法介入の効果検証 ランダム化比較試験

  井平 光, 牧野 圭太郎, 松田 夕香, 小野 道洋, 石川 和真, 佐藤 昌則, 石合 純夫, 加藤 淳二, 古名 丈人

  理学療法学 ( (公社)日本理学療法士協会 )  43 ( Suppl.2 ) O - 5  2016.10

• 地域在住高齢者における身体機能が転倒恐怖感に及ぼす影響

  石田 豊朗, 井平 光, 牧野 圭太郎, 木原 由里子, 志水 宏太郎, 伊藤 一成, 山口 亨, 古名 丈人

  理学療法学 ( (公社)日本理学療法士協会 )  43 ( Suppl.2 ) O - 2  2016.10

• 積雪寒冷地域に住む後期高齢者の冬期間の身体活動量低下がその後3年間の認知機能の変化に及ぼす影響 地域在住後期高齢者の冬期間の身体活動量低下がその後3年間の認知機能の変化に及ぼす影響

  牧野 圭太郎, 島田 裕之, 牧迫 飛雄馬, 井平 光, 木原 由里子, 石田 豊朗, 志水 宏太郎, 伊藤 一成, 山口 亨, 古名 丈人

  理学療法学 ( (公社)日本理学療法士協会 )  43 ( Suppl.2 ) O - 2  2016.10

• 地域在住後期高齢者における身体活動量の縦断調査と関連要因の検討

  伊藤 一成, 井平 光, 牧野 圭太郎, 木原 由里子, 石田 豊朗, 志水 宏太郎, 山口 亨, 牧迫 飛雄馬, 島田 裕之, 古名 丈人

  理学療法学 ( (公社)日本理学療法士協会 )  43 ( Suppl.2 ) P - 2  2016.10

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Awards 【 display / non-display 】

Awards 【 display / non-display 】

• Best Poster Award

  2025.02   15th International Nursing Conference & 28th East Asian Forum of Nursing Scholars.   Professionals' perceptions of remort care systems for older adults and related factors: a survey of community comprehensive support center managers in Japan.

  Winner： Fukagawa S., Yokoyama K., Kondo S., Toda H., Tashiro H., Kida T., Takahashi L., Mizumoto A., Makino K., Ihira H.

• 第3回日本予防理学療法学会学術集会学術集会長賞

  2017.05   日本理学療法士協会   外来化学療法を施行中の進行性がん患者に対する理学療法介入の効果検証

  Winner： 井平 光

• 第48回日本理学療法学会大会優秀賞

  2013.10   日本理学療法士協会   ミスマッチ陰性電位測定による地域在住高齢者の前注意過程の脳活動解析－姿勢制御時の運動機能と認知機能との相互関係－

  Winner： 井平 光

Research Projects 【 display / non-display 】

Research Projects 【 display / non-display 】

• パーキンソン病患者における疲労の要因分析と管理下における運動療法の効果

  基盤研究(C)

  Project Year :

  2025.04

  -

  2030.03

   

  安田圭佑, 菅原和広, 井平 光

• 社会的フレイル高齢者の抑うつや認知機能低下を予測する会話の客観的評価法の検討

  基盤研究(C)

  Project Year :

  2024.04

  -

  2028.03

   

  横山 和樹, 齊藤 秀和, 井平 光, 池田 望

• がんリハビリテーションの回復過程に影響を及ぼす生活要因：電子化医療情報による解析

  基盤研究(C)

  Project Year :

  2021.04

  -

  2024.03

   

  井平 光

  　View Summary

  がんリハビリテーションの回復過程に影響を及ぼす関連要因を、前向きコホート研究によって検証した研究はなく、早期の社会復帰を見据えた、三次予防に関連する生活要因を探索することが求められている。本研究では、地域在住の約11万人を対象とし、生活習慣に関するアンケート情報と、入退院時の電子化医療情報を用いて、がんリハビリテーションの回復過程に影響を与える生活習慣および生活環境を明らかにすることで、早期の社会復帰に資する具体的な改善策を提案することを目的とする。 2011年から開始された次世代多目的コホート研究（JPHC-NEXT）のベースライン調査に参加し同意を得た、40～74歳の男女約11万人を対象とする。現在、がんリハビリテーションを実施するがん患者の同定のため、診療報酬明細（レセプト）情報から把握されるがん罹患のアルゴリズムの妥当性を検証している。 この妥当性が確認された後、診療行為明細情報のレセプト電算処理システム用コード[180033110]（がん患者リハビリテーション料）で請求があった場合に、がんリハビリテーションを実施したと定義する。また、がん患者リハビリテーション料の算定条件を満たしていない施設が、がん患者にリハビリテーションを実施する場合には、「廃用症候群リハビリテーション料」として算定されること多いため、「がん」の主傷病名で「廃用症候群リハビリテーション料」が請求されている場合も、がんリハビリテーションの実施として定義する。 次年度は、上記の通りに同定されたがんリハビリテーション実施者について、電子化医療情報から把握できる情報（年齢、性別、入院日、病名情報、手術名、診療行為名、行為回数、退院日、および入退院時のADLスコア等）と質問票から得られた生活習慣の情報を突合したデータセットを構築する計画である。

• Lifestyle related to recovery process of rehabilitation using electronic medical information

  Grant-in-Aid for Early-Career Scientists

  Project Year :

  2018.04

  -

  2021.03

   

  Ihira Hikaru

  　View Summary

  This large-scale cohort study examined the association between pre-hospital lifestyle and the process of rehabilitation using electronic medical information. As for the rehabilitation type frequency, musculoskeletal rehabilitation was the most common. Approximately 30% of the participants showed improvement in activities of daily living (ADL) during hospitalization. Additionally, we found that lower ADL during hospitalization may be related to an existing history of diabetes. In the future, it will be necessary to examine the association between changes in ADL and lifestyle in rehabilitation by disease and propose specific lifestyles to prevent severe disability and early social reinstatement.

• 外来化学療法施行中のがん患者に対する在宅理学療法の効果検証－ランダム化比較試験－

  Project Year :

  2014.04

  -

  2015.03

   

  井平 光

  Authorship： Principal investigator

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