K. Obayashi

N. Kurumatani, N. Otaki, K. Obayashi, 2016, Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research.

Association between before-bedtime passive body heating and nocturia during the cold season among older adults.

N. Kurumatani, K. Obayashi, K. Saeki, 2022, Journal of epidemiology.

Association Between Passive Body Heating by Hot Water Bathing Before Bedtime and Depressive Symptoms Among Community-Dwelling Older Adults.

N. Kurumatani, K. Obayashi, K. Saeki, 2021, The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry.

Quantitative association between nocturnal voiding frequency and objective sleep quality in the general elderly population: the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Sleep medicine.

Gender differences in the association between objective sleep quality and leukocyte count: The HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2016, Physiology & Behavior.

Relationship between asymmetric dimethylarginine and nocturia in the general elderly population: The HEIJO‐KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Neurourology and urodynamics.

Asymmetric dimethylarginine attenuates the association of melatonin secretion with night-time blood pressure and dipping in elderly individuals.

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Circulation journal : official journal of the Japanese Circulation Society.

Melatonin Secretion and Muscle Strength in Elderly Individuals: A Cross-Sectional Study of the HEIJO-KYO Cohort.

N. Kurumatani, N. Otaki, K. Obayashi, 2016, The journals of gerontology. Series A, Biological sciences and medical sciences.

Bedroom lighting environment and incident diabetes mellitus: a longitudinal study of the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2019, Sleep medicine.

Higher melatonin secretion is associated with lower leukocyte and platelet counts in the general elderly population: the HEIJO‐KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Journal of pineal research.

Objectively measured physical activity relates to night-time blood pressure in older adults: cross-sectional analysis in the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2019, Journal of hypertension.

Associations between indoor light pollution and unhealthy outcomes in 2,947 adults: Cross-sectional analysis in the HEIJO-KYO cohort.

K. Obayashi, K. Saeki, Yoshiaki Tai, 2022, Environmental research.

Breakfast Skipping and Declines in Cognitive Score Among Community-Dwelling Older Adults: A Longitudinal Study of the HEIJO-KYO Cohort

M. Morikawa, M. Iki, R. Ishizuka, 2022, Journal of geriatric psychiatry and neurology.

Independent Associations Between Nocturia and Nighttime Blood Pressure/Dipping in Elderly Individuals: The HEIJO‐KYO Cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Journal of the American Geriatrics Society.

Response to commentary: does before bedtime body warming by bathing or other means attenuate sleep-time arterial blood pressure?

K. Obayashi, K. Saeki, Yoshiaki Tai, 2020, Chronobiology international.

Influence of depression on the association between colder indoor temperature and higher blood pressure

N. Kurumatani, K. Obayashi, K. Saeki, 2022, Journal of hypertension.

Changes in Skin Perfusion Pressure After Endovascular Treatment for Chronic Limb-Threatening Ischemia

K. Kichikawa, K. Obayashi, M. Takahara, 2020, Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists.

Vessel Calcification as a Risk Factor for In-Stent Restenosis in Complex Femoropopliteal Lesions After Zilver PTX Paclitaxel-Coated Stent Placement

K. Kichikawa, K. Obayashi, K. Saeki, 2019, Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists.

Inverse Association of Skin Temperature With Ambulatory Blood Pressure and the Mediation of Skin Temperature in Blood Pressure Responses to Ambient Temperature

K. Obayashi, K. Saeki, Yoshiaki Tai, 2022, Hypertension.

Platelet count and indoor cold exposure among elderly people: A cross-sectional analysis of the HEIJO-KYO study Journal of Epidemiology

N. Kurumatani, K. Obayashi, K. Saeki, 2017 .

Effect of nighttime bedroom light exposure on mood episode relapses in bipolar disorder

K. Obayashi, K. Saeki, N. Iwata, 2022, Acta psychiatrica Scandinavica.

Habitual light exposure and circadian activity rhythms in bipolar disorder: A cross-sectional analysis of the APPLE cohort.

K. Obayashi, K. Saeki, N. Iwata, 2022, Journal of affective disorders.

Assessment of self‐/parent‐reported quality of life in Japanese children with haemophilia using the Japanese version of KIDSCREEN‐52

N. Kurumatani, K. Obayashi, K. Saeki, 2020, Haemophilia : the official journal of the World Federation of Hemophilia.

Reliability and validity of the Japanese version of the KIDSCREEN-52 health-related quality of life questionnaire for children/adolescents and parents/proxies

R. Ishizuka, N. Okamoto, N. Kurumatani, 2014, Environmental Health and Preventive Medicine.

Exposure to light at night and risk of depression in the elderly.

N. Kurumatani, K. Obayashi, K. Saeki, 2013, Journal of affective disorders.

Short-term effects of instruction in home heating on indoor temperature and blood pressure in elderly people: a randomized controlled trial

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Journal of hypertension.

Stronger association of indoor temperature than outdoor temperature with blood pressure in colder months

Nozomi Okamoto, Junko Iwamoto, N. Okamoto, 2014, Journal of hypertension.

Risk for lung cancer in workers exposed to benzidine and/or beta-naphthylamine: a protocol for systematic review and meta-analysis

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Systematic Reviews.

Increased risk of lung cancer associated with occupational exposure to benzidine and/or beta-naphthylamine

N. Okamoto, N. Kurumatani, K. Obayashi, 2015, International Archives of Occupational and Environmental Health.

The relationship between indoor, outdoor and ambient temperatures and morning BP surges from inter-seasonally repeated measurements

N. Okamoto, N. Kurumatani, K. Obayashi, 2014, Journal of Human Hypertension.

Risk of Lung Cancer in Workers Exposed to Benzidine and/or Beta-Naphthylamine: A Systematic Review and Meta-Analysis.

N. Kurumatani, K. Obayashi, K. Saeki, 2016, Journal of epidemiology.

Association between melatonin secretion and nocturia in elderly individuals: a cross-sectional study of the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2014, The Journal of urology.

Ambient Light Exposure and Changes in Obesity Parameters: A Longitudinal Study of the HEIJO-KYO Cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2016, The Journal of clinical endocrinology and metabolism.

Exposure to light at night, nocturnal urinary melatonin excretion, and obesity/dyslipidemia in the elderly: a cross-sectional analysis of the HEIJO-KYO study.

N. Okamoto, N. Kurumatani, K. Obayashi, 2013, The Journal of clinical endocrinology and metabolism.

The CLOCK-IOL Study about the short-term influence of cataract surgery on circadian biological rhythm and related health outcomes: study protocol for a randomized controlled trial

K. Obayashi, K. Saeki, T. Matsuura, 2020 .

Indoor Thermal Environment and Cardiovascular Diseases

K. Obayashi, K. Saeki, 2019 .

[Thermal and Lighting Housing Environments and Circadian Blood Pressure Variability: Findings from the HEIJO-KYO Cohort].

K. Obayashi, K. Saeki, 2018, Nihon eiseigaku zasshi. Japanese journal of hygiene.

Platelet count and indoor cold exposure among elderly people: A cross-sectional analysis of the HEIJO-KYO study

N. Kurumatani, K. Obayashi, K. Saeki, 2017, Journal of epidemiology.

Daytime cold exposure and salt intake based on nocturnal urinary sodium excretion: A cross-sectional analysis of the HEIJO-KYO study

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Physiology & Behavior.

Influence of room heating on ambulatory blood pressure in winter: a randomised controlled study

N. Okamoto, N. Kurumatani, K. Obayashi, 2013, Journal of Epidemiology & Community Health.

The interaction effect between physical and cultural leisure activities on the subsequent decline of instrumental ADL: the Fujiwara-kyo study

M. Morikawa, N. Okamoto, N. Kurumatani, 2019, Environmental Health and Preventive Medicine.

The effect of blue-blocking intraocular lenses on circadian biological rhythm: protocol for a randomised controlled trial (CLOCK-IOL colour study)

N. Kurumatani, K. Obayashi, K. Saeki, 2015, BMJ Open.

Decreased melatonin secretion in patients with glaucoma: quantitative association with glaucoma severity in the LIGHT study.

K. Obayashi, K. Saeki, N. Ogata, 2020, Journal of pineal research.

Relationship between melatonin secretion and nighttime blood pressure in elderly individuals with and without antihypertensive treatment: a cross-sectional study of the HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Hypertension Research.

Nighttime BP in Elderly Individuals with Prediabetes/Diabetes with and without CKD: The HEIJO-KYO Study.

N. Kurumatani, K. Obayashi, K. Saeki, 2016, Clinical journal of the American Society of Nephrology : CJASN.

Analysis of factors related to low health-related quality of life in children with epilepsy using a self-assessed Japanese version of the KIDSCREEN-52

N. Kurumatani, K. Obayashi, K. Saeki, 2020, Brain and Development.

Lower Incidence of In-Hospital Falls in Patients Hospitalized in Window Beds Than Nonwindow Beds.

N. Kurumatani, K. Obayashi, K. Saeki, 2020, Journal of the American Medical Directors Association.

Nocturnal urinary melatonin excretion is associated with non-dipper pattern in elderly hypertensives

N. Okamoto, N. Kurumatani, K. Obayashi, 2013, Hypertension Research.

Melatonin secretion in patients with Parkinson's disease receiving different-dose levodopa therapy.

N. Kurumatani, K. Obayashi, K. Saeki, 2020, Sleep medicine.

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

N. Kurumatani, K. Obayashi, K. Saeki, 2019, Chronobiology international.

Relationship between breakfast skipping and obesity among elderly: Cross-sectional analysis of the HEIJO-KYO study

N. Kurumatani, N. Otaki, K. Obayashi, 2016, The journal of nutrition, health & aging.

Short-term influence of cataract surgery on circadian biological rhythm and related health outcomes (CLOCK-IOL trial): study protocol for a randomized controlled trial

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Trials.

Pre-awake light exposure and sleep disturbances: findings from the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2019, Sleep medicine.

Association between circadian activity rhythms and mood episode relapse in bipolar disorder: a 12-month prospective cohort study

K. Obayashi, K. Saeki, N. Iwata, 2021, Translational Psychiatry.

Light exposure at night and sleep quality in bipolar disorder: The APPLE cohort study.

K. Obayashi, K. Saeki, N. Iwata, 2019, Journal of affective disorders.

Daytime light exposure in daily life and depressive symptoms in bipolar disorder: A cross-sectional analysis in the APPLE cohort.

K. Obayashi, K. Saeki, N. Iwata, 2019, Journal of psychiatric research.

Effect of exposure to evening light on sleep initiation in the elderly: A longitudinal analysis for repeated measurements in home settings

N. Okamoto, N. Kurumatani, K. Obayashi, 2014, Chronobiology international.

Positive effect of daylight exposure on nocturnal urinary melatonin excretion in the elderly: a cross-sectional analysis of the HEIJO-KYO study.

N. Okamoto, N. Kurumatani, K. Obayashi, 2012, The Journal of clinical endocrinology and metabolism.

Association Between Postillumination Pupil Response and Glaucoma Severity: A Cross-Sectional Analysis of the LIGHT Study

K. Obayashi, K. Saeki, N. Ogata, 2022, Investigative ophthalmology & visual science.

Association between light exposure at night and insomnia in the general elderly population: The HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Chronobiology international.

Bodily pain, social support, depression symptoms and stroke history are independently associated with sleep disturbance among the elderly: a cross-sectional analysis of the Fujiwara-kyo study

N. Okamoto, N. Kurumatani, K. Obayashi, 2016, Environmental Health and Preventive Medicine.

Indoor light pollution and progression of carotid atherosclerosis: A longitudinal study of the HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2019, Environment international.

Bedroom Light Exposure at Night and the Incidence of Depressive Symptoms: A Longitudinal Study of the HEIJO-KYO Cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2018, American journal of epidemiology.

Comparisons of Objective Sleep Quality Between Elderly Individuals With and Without Cataract Surgery: A Cross-Sectional Study of the HEIJO-KYO Cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Journal of epidemiology.

Light exposure at night is associated with subclinical carotid atherosclerosis in the general elderly population: The HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2015, Chronobiology international.

Bedroom light exposure at night and obesity in individuals with bipolar disorder: A cross-sectional analysis of the APPLE cohort

K. Obayashi, K. Saeki, N. Iwata, 2020, Physiology & Behavior.

Higher Cognitive Function in Elderly Individuals with Previous Cataract Surgery: Cross-Sectional Association Independent of Visual Acuity in the HEIJO-KYO Cohort.

M. Morikawa, N. Kurumatani, K. Obayashi, 2016, Rejuvenation research.

Association between light exposure at night and nighttime blood pressure in the elderly independent of nocturnal urinary melatonin excretion

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Chronobiology international.

Increased depressive symptoms in Parkinson’s disease during the COVID‐19 pandemic: preliminary findings from longitudinal analysis of the PHASE study

K. Obayashi, K. Saeki, K. Sugie, 2023, Clinical Parkinsonism & Related Disorders.

Objective sleep measures between patients with Parkinson's disease and community-based older adults.

Hiroshi Kataoka, N. Kurumatani, K. Obayashi, 2019, Sleep medicine.

Higher prevalence of intentional self-harm in bipolar disorder with evening chronotype: A finding from the APPLE cohort study.

K. Obayashi, K. Saeki, N. Iwata, 2020, Journal of affective disorders.

Short-wavelength light exposure at night and sleep disturbances accompanied by decreased melatonin secretion in real-life settings: a cross-sectional study of the HEIJO-KYO cohort.

K. Obayashi, K. Saeki, Yoshiaki Tai, 2022, Sleep medicine.

Effects of Cataract Surgery on Melatonin Secretion in Adults 60 Years and Older: A Randomized Clinical Trial.

N. Kurumatani, K. Obayashi, K. Saeki, 2020, JAMA ophthalmology.

Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort.

M. Morikawa, N. Kurumatani, K. Obayashi, 2015, The Journal of clinical endocrinology and metabolism.

Indoor cold exposure and nocturia: a cross‐sectional analysis of the HEIJO‐KYO study

N. Kurumatani, K. Obayashi, K. Saeki, 2016, BJU international.

Association between indoor noise level at night and objective/subjective sleep quality in the older population: a cross-sectional study of the HEIJO-KYO cohort

K. Obayashi, K. Saeki, Yoshiaki Tai, 2023, Sleep.

Independent associations of exposure to evening light and nocturnal urinary melatonin excretion with diabetes in the elderly

N. Kurumatani, K. Obayashi, K. Saeki, 2014, Chronobiology international.

Reliability and validity of Japanese versions of KIDSCREEN-27 and KIDSCREEN-10 questionnaires

R. Ishizuka, N. Kurumatani, K. Obayashi, 2016, Environmental Health and Preventive Medicine.

M. Morikawa, N. Okamoto, N. Kurumatani, 2014 .

Increased Nighttime Blood Pressure in Patients with Glaucoma: Cross-sectional Analysis of the LIGHT Study.

K. Obayashi, K. Saeki, N. Ogata, 2019, Ophthalmology.

Association between glaucomatous optic disc and depressive symptoms independent of light exposure profiles: a cross-sectional study of the HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2018, British Journal of Ophthalmology.

[Clinical impact of nephropathy induced by contrast medium in patients with acute myocardial infarction undergoing emergent coronary angiography].

H. Kasanuki, K. Obayashi, J. Yamaguchi, 2006, Journal of Cardiology.

Gender differences in the relationships between chronic kidney disease, asymmetric dimethylarginine, and sleep quality: The HEIJO-KYO cohort.

N. Kurumatani, K. Obayashi, K. Saeki, 2018, Nitric oxide : biology and chemistry.

Objective sleep quality and night-time blood pressure in the general elderly population: a cross-sectional study of the HEIJO-KYO cohort

N. Kurumatani, K. Obayashi, K. Saeki, 2017, Journal of hypertension.

Positive Association between Macular Pigment Optical Density and Glomerular Filtration Rate: A Cross-Sectional Study

K. Obayashi, K. Saeki, N. Ogata, 2023, Journal of clinical medicine.

Lower melatonin secretion in older females: gender differences independent of light exposure profiles.

N. Kurumatani, K. Obayashi, K. Saeki, 2015 .

Association between light exposure at night and manic symptoms in bipolar disorder: cross-sectional analysis of the APPLE cohort

K. Obayashi, K. Saeki, N. Iwata, 2020, Chronobiology international.

Circadian variability of objective sleep measures predicts the relapse of a mood episode in bipolar disorder: findings from the APPLE cohort

K. Obayashi, K. Saeki, N. Iwata, 2023, Psychiatry and clinical neurosciences.

Comparison of objective and subjective sleep parameters in patients with bipolar disorder in both euthymic and residual symptomatic periods.

K. Obayashi, K. Saeki, N. Iwata, 2021, Journal of psychiatric research.

Preventive effect of morning light exposure on relapse into depressive episode in bipolar disorder

K. Obayashi, K. Saeki, N. Iwata, 2021, Acta psychiatrica Scandinavica.

Effect of evening light exposure on sleep in bipolar disorder: A longitudinal analysis for repeated measures in the APPLE cohort

K. Obayashi, K. Saeki, N. Iwata, 2020, The Australian and New Zealand journal of psychiatry.

Decreased daytime light intensity at nonwindow hospital beds: Comparisons with light intensity at window hospital beds and light exposure in nonhospitalized elderly individuals

N. Kurumatani, K. Obayashi, K. Saeki, 2018, Chronobiology international.

Response to Suzuki et al.: does good sleep reduce early-morning off periods in patients with Parkinson's disease?

K. Obayashi, H. Kataoka, 2020, Sleep.

Quantitative associations between objective sleep measures and early-morning mobility in Parkinson's disease: cross-sectional analysis of the PHASE study.

Hiroshi Kataoka, K. Obayashi, K. Saeki, 2020, Sleep.

Lower Cognitive Function in Patients With Functionally and Structurally Severe Glaucoma: The LIGHT Study

K. Obayashi, K. Saeki, N. Ogata, 2021, Journal of glaucoma.

Post-Illumination Pupil Response and Sleep Quality in Patients With Glaucoma: The LIGHT Study

K. Obayashi, K. Saeki, Tadanobu Yoshikawa, 2023, Investigative ophthalmology & visual science.

Association Between the Asymmetric Dimethylarginine Levels and Glaucoma Severity: A Cross-Sectional Analysis of the LIGHT Study

K. Obayashi, K. Saeki, N. Ogata, 2021, Investigative ophthalmology & visual science.