Ryuji Ogihara

1.1k total citations
11 papers, 827 citations indexed

About

Ryuji Ogihara is a scholar working on Experimental and Cognitive Psychology, Demography and General Health Professions. According to data from OpenAlex, Ryuji Ogihara has authored 11 papers receiving a total of 827 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Experimental and Cognitive Psychology, 3 papers in Demography and 2 papers in General Health Professions. Recurrent topics in Ryuji Ogihara's work include Sleep and related disorders (5 papers), Migration, Aging, and Tourism Studies (2 papers) and Health and Wellbeing Research (2 papers). Ryuji Ogihara is often cited by papers focused on Sleep and related disorders (5 papers), Migration, Aging, and Tourism Studies (2 papers) and Health and Wellbeing Research (2 papers). Ryuji Ogihara collaborates with scholars based in Japan, India and China. Ryuji Ogihara's co-authors include Masako Okawa, Xianchen Liu, Makoto Uchiyama, Makoto Uchiyama, Kayo Shibui, Masumi Minowa, Keiko Kim, Yuriko Doi, Yoshihisa Kudo and Takashi Ohida and has published in prestigious journals such as Journal of the American Geriatrics Society, SLEEP and Psychosomatic Medicine.

In The Last Decade

Ryuji Ogihara

10 papers receiving 779 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ryuji Ogihara Japan	7	598	375	120	114	104	11	827
Siri Omvik Norway	8	705 1.2×	528 1.4×	144 1.2×	182 1.6×	59 0.6×	14	859
Mary E. Fletcher United States	8	638 1.1×	405 1.1×	70 0.6×	180 1.6×	62 0.6×	11	745
Ling‐Ling Tsai Taiwan	15	444 0.7×	364 1.0×	147 1.2×	160 1.4×	116 1.1×	31	960
Arnaud Metlaine France	14	544 0.9×	285 0.8×	86 0.7×	116 1.0×	194 1.9×	35	862
Hyeryeon Yi South Korea	12	380 0.6×	245 0.7×	85 0.7×	72 0.6×	89 0.9×	18	656
Seung‐Chul Hong South Korea	12	420 0.7×	322 0.9×	83 0.7×	159 1.4×	66 0.6×	52	720
M. Montserrat Sánchez-Ortuño Spain	15	698 1.2×	464 1.2×	79 0.7×	139 1.2×	39 0.4×	29	907
Giselle Soares Passos Brazil	11	468 0.8×	305 0.8×	172 1.4×	136 1.2×	50 0.5×	30	645
Marcos Gonçalves Santana Brazil	15	608 1.0×	357 1.0×	287 2.4×	158 1.4×	78 0.8×	49	999
Natalie D. Dautovich United States	7	427 0.7×	252 0.7×	81 0.7×	58 0.5×	60 0.6×	28	569

Countries citing papers authored by Ryuji Ogihara

Since Specialization

Citations

This map shows the geographic impact of Ryuji Ogihara'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 Ryuji Ogihara with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryuji Ogihara more than expected).

Fields of papers citing papers by Ryuji Ogihara

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryuji Ogihara. 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 Ryuji Ogihara. The network helps show where Ryuji Ogihara may publish in the future.

Co-authorship network of co-authors of Ryuji Ogihara

This figure shows the co-authorship network connecting the top 25 collaborators of Ryuji Ogihara. A scholar is included among the top collaborators of Ryuji Ogihara 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 Ryuji Ogihara. Ryuji Ogihara is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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11 of 11 papers shown

Ozaki, Akiko, Makoto Uchiyama, Hirokuni Tagaya, Takashi Ohida, & Ryuji Ogihara. (2006). The Japanese Centenarian Study: Autonomy Was Associated with Health Practices as Well as Physical Status. Journal of the American Geriatrics Society. 55(1). 95–101. 58 indexed citations

Ozaki, Akiko, Ryuji Ogihara, Makoto Uchiyama, et al.. (2003). [Preservation of quality of life and its relation to lifestyle in centenarians in Japan: a visitation interview survey].. PubMed. 50(8). 697–712. 2 indexed citations

Ogihara, Ryuji, Toshiki Ohta, Kiyoshi Maeda, et al.. (2002). The Effects of Experiencing a Fall on the Activities of Daily Living (ADL) in Japanese Centenarians. 25(1). 8–18. 1 indexed citations

Uchiyama, Makoto, Xianchen Liu, Kayo Shibui, et al.. (2001). Somatic and Psychological Complaints and Their Correlates With Insomnia in the Japanese General Population. Psychosomatic Medicine. 63(3). 441–446. 60 indexed citations

Ogihara, Ryuji, et al.. (2000). [ADL and actual life styles of all Japanese centenarians as determined by a visitation interview survey].. PubMed. 47(3). 275–83. 2 indexed citations

Liu, Xianchen, Makoto Uchiyama, Keiko Kim, et al.. (2000). Sleep loss and daytime sleepiness in the general adult population of Japan. Psychiatry Research. 93(1). 1–11. 207 indexed citations

Uchiyama, Makoto, et al.. (2000). An Epidemiological Study of Insomnia Among the Japanese General Population. SLEEP. 23(1). 1–7. 431 indexed citations

Kim, Keiko, et al.. (1999). Lifestyles and sleep disorders among the Japanese adult population. Psychiatry and Clinical Neurosciences. 53(2). 269–270. 14 indexed citations

Ogihara, Ryuji, et al.. (1999). Effectiveness of a stress management program for family caregivers of the elderly at home.. PubMed. 46(4). 145–53. 14 indexed citations

10.

Arai, Hiroyuki, et al.. (1983). [CT study in Alzheimer's disease].. PubMed. 85(1). 1–14. 1 indexed citations

11.

Arai, Heii, et al.. (1983). A computed tomography study of Alzheimer's disease. Journal of Neurology. 229(2). 69–77. 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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