Kenji Obayashi

2.9k total citations
116 papers, 2.1k citations indexed

About

Kenji Obayashi is a scholar working on Endocrine and Autonomic Systems, Experimental and Cognitive Psychology and Physiology. According to data from OpenAlex, Kenji Obayashi has authored 116 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 56 papers in Endocrine and Autonomic Systems, 40 papers in Experimental and Cognitive Psychology and 35 papers in Physiology. Recurrent topics in Kenji Obayashi's work include Circadian rhythm and melatonin (56 papers), Sleep and related disorders (36 papers) and Climate Change and Health Impacts (17 papers). Kenji Obayashi is often cited by papers focused on Circadian rhythm and melatonin (56 papers), Sleep and related disorders (36 papers) and Climate Change and Health Impacts (17 papers). Kenji Obayashi collaborates with scholars based in Japan, Israel and Bulgaria. Kenji Obayashi's co-authors include Keigo Saeki, Norio Kurumatani, Junko Iwamoto, Yoshito Ikada, Kimiko Tomioka, Nozomi Okamoto, Yuki Yamagami, Satoko Nezu, Yuichi Esaki and Nakao Iwata and has published in prestigious journals such as SHILAP Revista de lepidopterología, The Journal of Clinical Endocrinology & Metabolism and American Journal of Epidemiology.

In The Last Decade

Kenji Obayashi

114 papers receiving 2.1k citations

Peers

Kenji Obayashi
Junko Iwamoto Japan
Nozomi Okamoto Japan
Tuuli Lahti Finland
Florian Lederbogen Germany
Philippe Boudreau Canada
Lisa F. Wolfe United States
Jo Phipps‐Nelson Australia
Robert Fell United States
Taylor E. Purvis United States
Daniela Grimaldi Italy
Junko Iwamoto Japan
Kenji Obayashi
Citations per year, relative to Kenji Obayashi Kenji Obayashi (= 1×) peers Junko Iwamoto

Countries citing papers authored by Kenji Obayashi

Since Specialization
Citations

This map shows the geographic impact of Kenji Obayashi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kenji Obayashi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kenji Obayashi more than expected).

Fields of papers citing papers by Kenji Obayashi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kenji Obayashi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kenji Obayashi. The network helps show where Kenji Obayashi may publish in the future.

Co-authorship network of co-authors of Kenji Obayashi

This figure shows the co-authorship network connecting the top 25 collaborators of Kenji Obayashi. A scholar is included among the top collaborators of Kenji Obayashi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kenji Obayashi. Kenji Obayashi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Obayashi, Kenji, et al.. (2025). Forecasting daily bathtub-drowning mortality in Japan: a comparative analysis of statistical, machine learning, and deep learning approaches. Frontiers in Public Health. 13. 1715622–1715622. 1 indexed citations
2.
Obayashi, Kenji, et al.. (2025). Association between outdoor temperature and bath-related drowning deaths in Japan (1995–2020): modifying factors and the role of prefectural characteristics. Environmental Health and Preventive Medicine. 30(0). 55–55. 2 indexed citations
3.
Obayashi, Kenji, et al.. (2025). Seasonal variations in bathtub drowning deaths and the impact of outdoor temperatures: a nationwide time-series analysis with future projections. Environmental Health and Preventive Medicine. 30(0). 99–99. 1 indexed citations
4.
Obayashi, Kenji, et al.. (2025). Association between before-bedtime hot-tub bathing and sleep quality in real-life settings among community-dwelling older adults. Sleep Health. 11(6). 908–915. 1 indexed citations
5.
Esaki, Yuichi, Kenji Obayashi, Keigo Saeki, et al.. (2024). Daytime napping and depressive symptoms in bipolar disorder: A cross-sectional analysis of the APPLE cohort. Sleep Medicine. 124. 688–694. 1 indexed citations
6.
Obayashi, Kenji, et al.. (2024). Blood pressure, pulse rate, and skin temperature during hot-water bathing in real-world settings among community-dwelling older adults: the HEIJO-KYO Study. Environmental Health and Preventive Medicine. 29(0). 12–12. 4 indexed citations
7.
Obayashi, Kenji, Keigo Saeki, Yuki Yamagami, et al.. (2024). Daily light exposure profiles and the association with objective sleep quality in patients with Parkinson’s disease: The PHASE study. SLEEP. 47(8). 2 indexed citations
8.
Tai, Yoshiaki, Kenji Obayashi, Yuki Yamagami, et al.. (2024). Association between skin temperature and actigraphic sleep metrics in patients with Parkinson's disease: The PHASE study. SHILAP Revista de lepidopterología. 4. 100100–100100. 1 indexed citations
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Obayashi, Kenji, et al.. (2022). Associations between indoor light pollution and unhealthy outcomes in 2,947 adults: Cross-sectional analysis in the HEIJO-KYO cohort. Environmental Research. 215(Pt 2). 114350–114350. 21 indexed citations
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Ichihashi, Shigeo, Mitsuyoshi Takahara, Naoki Fujimura, et al.. (2020). Changes in Skin Perfusion Pressure After Endovascular Treatment for Chronic Limb-Threatening Ischemia. Journal of Endovascular Therapy. 28(2). 208–214. 8 indexed citations
15.
Ichihashi, Shigeo, Tsuyoshi Shibata, Naoki Fujimura, et al.. (2019). Vessel Calcification as a Risk Factor for In-Stent Restenosis in Complex Femoropopliteal Lesions After Zilver PTX Paclitaxel-Coated Stent Placement. Journal of Endovascular Therapy. 26(5). 613–620. 27 indexed citations
16.
Obayashi, Kenji, et al.. (2019). Indoor light pollution and progression of carotid atherosclerosis: A longitudinal study of the HEIJO-KYO cohort. Environment International. 133(Pt B). 105184–105184. 38 indexed citations
17.
Obayashi, Kenji, et al.. (2019). Increased Nighttime Blood Pressure in Patients with Glaucoma. Ophthalmology. 126(10). 1366–1371. 13 indexed citations
18.
Obayashi, Kenji, Norio Kurumatani, & Keigo Saeki. (2018). Gender differences in the relationships between chronic kidney disease, asymmetric dimethylarginine, and sleep quality: The HEIJO-KYO cohort. Nitric Oxide. 79. 25–30. 3 indexed citations
19.
Obayashi, Kenji, Yuki Yamagami, Norio Kurumatani, & Keigo Saeki. (2018). Pre-awake light exposure and sleep disturbances: findings from the HEIJO-KYO cohort. Sleep Medicine. 54. 121–125. 14 indexed citations
20.
Saeki, Keigo, Nozomi Okamoto, Kimiko Tomioka, et al.. (2011). Work‐related Aggression and Violence Committed by Patients and Its Psychological Influence on Doctors. Journal of Occupational Health. 53(5). 356–364. 37 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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