Ryuji Ogihara

An Epidemiological Study of Insomnia Among the Japanese General Population

Kyuja Kim, Makoto Uchiyama, Masako Okawa et al. · SLEEP · 2000 · 524 citations · Full text

Medicine, Health Sciences, Psychology +16

Sleep loss and daytime sleepiness in the general adult population of Japan

Xianchen Liu, Makoto Uchiyama, Keiko Kim et al. · Psychiatry Research · 2000 · 280 citations

Medicine, Internal Medicine, Sleep Medicine +13

The Japanese Centenarian Study: Autonomy Was Associated with Health Practices as Well as Physical Status

Akiko Ozaki, Makoto Uchiyama, Hirokuni Tagaya et al. · Journal of the American Geriatrics Society · 2006 · 90 citations

Medicine, Geriatric Medicine, Population Health Sciences +14

Somatic and Psychological Complaints and Their Correlates With Insomnia in the Japanese General Population

Kyuja Kim, Makoto Uchiyama, Xianchen Liu et al. · Psychosomatic Medicine · 2001 · 71 citations

Medicine, Psychology, Behavioral Epidemiology +12

A computed tomography study of Alzheimer's disease

Heii Arai, K Kobayashi, Keiichi Ikeda et al. · Journal of Neurology · 1983 · 49 citations

Medicine, Neurology, Radiology +12