Kenji Obayashi

J-GLOBAL         Last updated: Oct 16, 2019 at 14:01
 
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Name
Kenji Obayashi
Affiliation
Nara Medical University School of Medicine
Section
Epidemiology
Job title
Associate Professor
Research funding number
30596656
ORCID ID
0000-0001-6346-9082

Profile

Kenji Obayashi, MD, PhD, is an Associate Professor in the Department of Epidemiology, Nara Medical University School of Medicine. Dr. Obayashi earned his MD at Tokyo Medical University, and PhD at Nara Medical University, Japan. He completed post-graduate training in internal medicine and clinical fellowship in adult cardiology from Tokyo Women’s Medical University Hospital, Japan. He is board certified in internal medicine and cardiology. His primary research interest is in exploring the exposures that influence the circadian timing system in human. Thus, Dr. Obayashi’s current special interests include epidemiology related to circadian biological rhythm (Chronoepidemiology).

・Board Certified Fellow of the Japanese Circulation Society (JCS)
・Board Certified Occupational Health Physician of the Japan Medical Association (JMA)
・Board Certified Sports and Health Physician of the Japan Medical Association (JMA)
・Certified Physician/Educator of the Japan Board of Public Health and Social Medicine

Research Areas

 
 

Awards & Honors

 
2018
Medical Research Encouragement Prize, Japan Medical Association
 
2018
Young Investigator's Award, Japan Epidemiological Association
 
2014
Young Investigator's Award, Japanese Society of Chronobiology
 

Others

 
・Board Certified Fellow of the Japanese Circulation Society (JCS)
・Board Certified Supervisory Physician for Public Health and Social Medicine(BPHSM)
・Board Certified Occupational Health Physician of the Japan Medical Association (JMA)
・Board Certified Sports and Health Physician of the Japan Medical Association (JMA)

Published Papers

 
Objectively Measured Physical Activity Relates to Nighttime Blood Pressure in Older Adults: Cross-Sectional Analysis in the HEIJO-KYO Cohort
Yamagami Y, Saeki K, Tai Y, Maegawa T, Iwamoto J, Kataoka H, Kurumatani N, Obayashi K
J Hypertens   (in press)    Oct 2019   [Refereed]
Association between Timing of Hot Water Bathing before Bedtime and Night-/Sleep-Time Blood Pressure and Dipping in the Elderly: A Longitudinal Analysis for Repeated Measurements in Home Settings
Tai Y, Saeki K, Yamagami Y, Yoshimoto K, Kurumatani N, Nishio K, Obayashi K
Chronobiol Int   (in press)    Oct 2019   [Refereed]
Indoor Light Pollution and Progression of Carotid Atherosclerosis: A Longitudinal Study of the HEIJO-KYO Cohort
Obayashi K, Yamagami Y, Tatsumi S, Kurumatani N, Saeki K
Environ Int   (in press)    Sep 2019   [Refereed]
Objective Sleep Measures between Patients with Parkinson’s Disease and Community-Based Older Adults
Kataoka H, Saeki K, Kurumatani N, Sugie K, Obayashi
Sleep Med   (in press)    Sep 2019   [Refereed]
Kataoka H, Saeki K, Yamagami Y, Sugie K, Obayashi K
Sleep   (in press)    Aug 2019   [Refereed]
Bedroom Lighting Environment and Incident Diabetes Mellitus: A Longitudinal Study of the HEIJO-KYO Cohort
Obayashi K, Yamagami Y, Kurumatani N, Saeki K
Sleep Med   (in press)    Jul 2019   [Refereed]
Iwamoto J, Saeki K, Kobayashi M, Yamagami Y, Yoshida O, Kurumatani N, Obayashi K
J Am Med Dir Assoc   (in press)    Jul 2019   [Refereed]
Yoshikawa T, Obayashi K, Miyata K, Nishi T, Ueda T, Kurumatani N, Saeki K, Ogata N
Circ J   83(10) 2044-2048   Oct 2019   [Refereed]
Yoshikawa T, Obayashi K, Miyata K, Saeki K, Ogata N
Ophthalmology   126(10) 1366-1371   Oct 2019   [Refereed]
Esaki Y, Kitajima T, Obayashi K, Saeki K, Fujita K, Iwata N
J Affect Disord   257(10) 314-320   Oct 2019   [Refereed]
Ichihashi S, Shibata T, Fujimura N, Nagatomi S, Yamamoto H, Kuraki R, Adachi A, Iwakoshi S, Saeki K, Obayashi K, Kichikawa K
J Endovasc Ther   26(5) 613-620   Oct 2019   [Refereed]
Esaki Y, Kitajima T, Obayashi K, Saeki K, Fujita K, Iwata N
J Psychiatr Res   116(9) 151-156   Sep 2019   [Refereed]
Yoshikawa T, Obayashi K, Miyata K, Ueda T, Kurumatani N, Saeki K, Ogata N
Brit J Ophthalmol   103(8) 1119-1122   Aug 2019   [Refereed]
Obayashi K, Yamagami Y, Kurumatani N, Saeki K
Sleep Med   54(2) 121-125   Feb 2019   [Refereed]
Yoshikawa T, Obayashi K, Miyata K, Nishi T, Ueda T, Kurumatani N, Saeki K, Ogata N
Hypertens Res   42(2) 204-210   Feb 2019   [Refereed]
Asai Y, Obayashi K, Oume M, Ogura M, Takeuchi K, Yamagami Y, Tai Y, Kurumatani N, Saeki K
J Affect Disord   241(12) 235-240   Dec 2018   [Refereed]
Obayashi K, Kurumatani N, Saeki K
Nitric Oxide   79(9) 25-30   Sep 2018   [Refereed]
Obayashi K, Saeki K
Nihon Eiseigaku Zasshi   73(2) 138-142   Jun 2018   [Refereed][Invited]
Obayashi K, Yamagami Y, Iwamoto J, Kurumatani N, Saeki K
Clin Endocrinol   89(6) 750-756   Jun 2018   [Refereed]
Iwamoto J, Obayashi K, Kobayashi M, Kotsuji T, Matsui R, Ito K, Yoshida O, Kurumatani N, Saeki K.
Chronobiol Int   35(5) 719-723   May 2018   [Refereed]

Conference Activities & Talks

 
Indoor Lighting Environments and Health Outcomes: Updated Evidence from Medicine [Invited]
Obayashi K
Japan Interior Health Sciences Association   Nov 2019   
Association between Objective Sleep Measures and Early Morning Akinesia in Parkinson’s Disease:Findings from the PHASE Study
Kataoka H, Saeki K, Yamagami Y, Sugie K, Obayashi K
Annual Meeting of Japanese Society of Neurological Therapeutics 2019   Nov 2019   
Decreased Melatonin Secretion in Severe Glaucoma Patients
Yoshikawa T, Obayashi K, Miyata K, Saeki K, Ogata N
Annual Congress of Japan Clinical Ophthalmology 2019   Oct 2019   
Effects of Cataract Surgery on Melatonin Secretion: A Randomized Controlled Trial (The CLOCK-IOL Study)
Nishi T, Saeki K, Miyata K, Yoshikawa T, Ueda T, Kurumatani N, Obayashi K, Ogata N
Annual Congress of Japan Clinical Ophthalmology 2019   Oct 2019   
Sleep Disturbances in Older Adults Exposed to Short-Wavelength Light at Night: the HEIJO-KYO Cohort
Mitsui K, Saeki K, Tone N, Suzuki S, Takamiya S, Obayashi K
Annual Meeting of Japanese Society for Chronobiology 2019   Oct 2019   
Nighttime Light Exposure and the Incidence of Diabetes Mellitus: A Longitudinal Study of the HEIJO-KYO Cohort
Obayashi K, Yamagami Y, Kurumatani N, Saeki K
World Sleep 2019   Sep 2019   
Cataract and Progression of Carotid Atherosclerosis: Longitudinal Analysis in the HEIJO-KYO Cohort
Yoshikawa T, Obayashi K, Miyata K, Saeki K, Ogata N
Annual Meeting of the Japanese Society for Cataract Research 2019   Jul 2019   
Circadian Activity Rhythms in Parkinson’s Disease: Findings from the PHASE Study
Kataoka H, Saeki K, Yamagami Y, Sugie K, Obayashi K
Annual Metting of Japanese Scosiety of Sleep Research 2019   Jun 2019   
Lower Melatonin Secretion in Elderly Individuals Exposed to Nighttime Short-Wavelength Light at Eye-Level
Mitsui K, Saeki K, Tone N, Suzuki S, Takamiya S, Yamagami Y, Obayashi K
Annual Metting of Japanese Scosiety of Sleep Research 2019   Jun 2019   
Incidence of In-Hospital Falls between Patients Hospitalized in Window Beds and Non-Window Beds
Iwamoto J, Saeki K, Kobayashi M, Yamagami Y, Yoshida O, Kurumatani N, Obayashi K
Annual Metting of Japanese Scosiety of Sleep Research 2019   Jun 2019   

Patents

 
特許6029006 : Methods and devices for measurement of light exposure and circadian rhythms
Tone N, Saeki K, Obayashi K, Suzuki S
特許6529832 : Methods and devices for estimating biological rhythms
Tone N, Saeki K, Obayashi K, Takamiya S, Suzuki S.
特開2017-158761 : Methods and devices for measuring blood pressure and sleep quality
Tone N, Saeki K, Obayashi K, Yamaji S
特開2015-029605 : Methods and devices for measurement of biological rhythms
Tone N, Saeki K, Obayashi K, Takamiya S

Research Grants & Projects

 
Long-term effects of light exposure and the incidence of diabetes, cardiovascular disease, cancer, dementia, and mortality
JSPS KAKENHI: Scientific Research (B)
Project Year: Apr 2019 - Mar 2024    Investigator(s): Kenji Obayashi
Hospitalization in window beds and the prevention of in-hospital falls: a multicenter prospective cohort study
JSPS KAKENHI: Scientific Research (C)
Project Year: Apr 2019 - Mar 2023    Investigator(s): Junko Iwamoto (shared: Kenji Obayashi)
Effects of glaucoma on circadian biological rhythms
JSPS KAKENHI: Scientific Research (C)
Project Year: Apr 2019 - Mar 2022    Investigator(s): Tadanobu Yoshikawa (shared: Kenji Obayashi)
Peripheral artery calcium score and the prognosis of PAD
JSPS KAKENHI: Scientific Research (C)
Project Year: Apr 2019 - Mar 2022    Investigator(s): Kimihiko Kichikawa (shared: Kenji Obayashi)
Effect of endogenous melatonin levels on the incidence of related diseases
Takeda Science Foundation: Medicine Research Grant
Project Year: Nov 2018 - May 2021    Investigator(s): Kenji Obayashi
Research on Housing Environments for Health
Japan Science and Technology Agency: Research Complex Program
Project Year: Apr 2016 - Mar 2020    Investigator(s): Hitoshi Ando (shared: Kenji Obayashi)
Association of indoor temperature with sleep quality and nighttime blood pressure in summer
JSPS KAKENHI: Scientific Research (C)
Project Year: Apr 2016 - Mar 2019    Investigator(s): Keigo Saeki (shared: Kenji Obayashi )
A longitudinal analysis on the association between light exposure and circadian rhythm related diseases in elderly population
JSPS KAKENHI: Scientific Research (B)
Project Year: Apr 2015 - Mar 2019    Investigator(s): Kenji Obayashi
An epidemiological study on the association between light exposure and biological rhythm and sleep quality among young and middle-aged population
JSPS KAKENHI: Scientific Research (B)
Project Year: Apr 2015 - Mar 2019    Investigator(s): Norio Kurumatani (shared: Kenji Obayashi )
A prospective cohort study on the association between window bed and in-hospital fall among elderly patients
JSPS KAKENHI: Scientific Research (C)
Project Year: Apr 2015 - Mar 2019    Investigator(s): Junko Iwamoto (shared: Kenji Obayashi)