Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort
Obayashi K* , Saeki K , Iwamoto J , Tone N , Tanaka K , Kataoka H , Morikawa M , Kurumatani N
J Clin Endocrinol Metab 100(8) 3090-3096 Aug, 2015

Comparisons of Objective Sleep Quality between Elderly Individuals With and Without Cataract Surgery: A Cross-Sectional Study of the HEIJO-KYO Cohort
Obayashi K* , Saeki K , Miyata K , Nishi T , Tone N , Ogata N , Kurumatani N
J Epidemiol 25(8) 529-535 Aug, 2015

Increased Risk of Lung Cancer Associated with Occupational Exposure to Benzidine and/or Beta-Naphthylamine
Tomioka K , Obayashi K , Saeki K , Okamoto N , Kurumatani N
Int Arch Occup Environ Health 88(4) 455-465 May, 2015

The Effect of Blue-Blocking Intraocular Lenses on Circadian Biological Rhythm: A Protocol for Randomised Controlled Trial (CLOCK-IOL Color Study)
Nishi T, Saeki K, Obayashi K, Miyata K, Tsujinaka H, Yamashita M, Masuda N, Mizusawa Y, Okamoto M, Hasegawa T, Maruoka S, Ueda T, Matsuura T, Tone N, Kurumatani N, Ogata N
BMJ Open, 5(5) e007930, May, 2015

Quantitative Association between Nocturnal Void Frequency and Objective Sleep Quality in the General Elderly Population: The HEIJO-KYO Cohort
Obayashi K*, Saeki K, Kurumatani N
Sleep Med, 16(5) 577-582, May, 2015

Independent associations between nocturia and nighttime blood pressure/dipping in elderly individuals: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
J Am Geriatr Soc, 63(4) 733-738, Apr, 2015

Light exposure at night is associated with subclinical carotid atherosclerosis in the general elderly population: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
Chronobiol Int, 32(3) 310-317, Mar, 2015

Higher melatonin secretion is associated with lower leukocyte and platelet counts in the general elderly population: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
J Pineal Res, 58(2) 227-233, Feb, 2015

Lower melatonin secretion in older female: gender differences independent of light exposure profiles
Obayashi K*, Saeki, K, Tone N, Iwamoto J, Miyata K, Ikada Y, Kurumatani N
J Epidemiol, 25(1) 38-43, Jan, 2015

Reliability and validity of the Japanese version of the KIDSCREEN-52 health-related quality of life questionnaire for children/adolescents and parents/proxies
Nezu S, Iwasaka H, Saeki K, Ishizuka R, Goma H, Okamoto N, Makino H, Tanimura M, Yoshizaki K, Obayashi K, Kurumatani N
Environ Health Prev Med, 20(1) 44-52, Jan, 2015