Positive Effect of Daylight Exposure on Nocturnal Urinary Melatonin Excretion in the Elderly: A Cross-sectional Analysis of the HEIJO-KYO Study
Obayashi K*, Saeki K, Iwamoto J, Okamoto N, Tomioka K, Nezu S, Ikada Y, Kurumatani N
J Clin Endocrinol Metab, 97(11) 4166-4173, Nov, 2012

Influence of Indoor and Outdoor Exposed Temperature on Morning Blood Pressure Surge: A Baseline Analysis of the HEIJO-KYO Cohort
Annual Meeting of Japanese Society of Public Health 2012
Saeki K , Obayashi K , Iwamoto J , Okamoto N , Tomioka K , Kurumatani N

Inverse Dose-response Association between Urinary Melatonin Excretion and Nocturnal Systolic Blood Pressure in the Elderly: The HEIJO-KYO Cohort
European Society of Cardiology Congress 2012
Obayashi K , Saeki K , Iwamoto J , Okamoto N , Tomioka K , Nezu S , Ikada Y , Kurumatani N

Lighting Environment and Health Outcomes
Kenko Jutaku Kyokai
Obayashi K

The Influence of Exposed Temperature and Physical Activity on Morning Blood Pressure Surge.
European Society of Hypertension Annual Meeting 2012
Saeki K , Obayashi K , Iwamoto J , Okamoto N , Tomioka K , Nezu S , Kurumatani N

A Cross-Sectional Study for the Association between Thermal/Lighting Environments and Blood Pressure Variability
Obayashi K*, Saeki K
Kenko Ikagaku, 27 11-22, Mar, 2012

Nighttime Urinary Melatonin Excretion Rate Is Inversely Associated With Nocturnal Hypertension and Non-Dipper Pattern among the Elderly: The HEIJO-KYO Cohort
European Society of Cardiology Congress 2011
Obayashi K , Saeki K , Iwamoto J , Okamoto N , Tomioka K , Nezu S , Ikada Y , Kurumatani N

Nighttime Physiological Melatonin Levels are Inversely Associated with Nocturnal Systolic Blood Pressure and Nocturnal Hypertension among the Elderly
European Society of Hypertension Annual Meeting 2011
Obayashi K , Saeki K , Iwamoto J , Okamoto N , Tomioka K , Nezu S , Ikada Y , Kurumatani N

Work-Related Aggression and Violence Committed by Patients and Its Psychological Influence on Doctors
Saeki K, Okamoto N, Tomioka K, Obayashi K, Nishioka H, Ohara K, Kurumatani N
J Occup Health, 53(5) 356-364, May, 2011

An Inadequately Heated Environment Increases Morning Blood Pressure and Morning Blood Pressure Surge in Winter: A Randomized Controlled Trial.
American Heart Association Scientific Session 2010
Saeki K , Obayashi K , Iwamoto J , Tanaka Y , Tanaka N , Takata S , Kubo H , Okamoto N , Tomioka K , Kurumatani N