Keiko Kim

2.6k total citations · 1 hit paper
14 papers, 1.4k citations indexed

About

Keiko Kim is a scholar working on Cognitive Neuroscience, Experimental and Cognitive Psychology and Endocrine and Autonomic Systems. According to data from OpenAlex, Keiko Kim has authored 14 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Cognitive Neuroscience, 11 papers in Experimental and Cognitive Psychology and 8 papers in Endocrine and Autonomic Systems. Recurrent topics in Keiko Kim's work include Sleep and related disorders (11 papers), Sleep and Wakefulness Research (10 papers) and Circadian rhythm and melatonin (8 papers). Keiko Kim is often cited by papers focused on Sleep and related disorders (11 papers), Sleep and Wakefulness Research (10 papers) and Circadian rhythm and melatonin (8 papers). Keiko Kim collaborates with scholars based in Japan, United States and India. Keiko Kim's co-authors include Masako Okawa, Kayo Shibui, Makoto Uchiyama, Masumi Minowa, Yuriko Doi, Yuichi Kamei, Xianchen Liu, Yoshihisa Kudo, Hirokuni Tagaya and Ryuji Ogihara and has published in prestigious journals such as SLEEP, Psychiatry Research and Neuroscience Letters.

In The Last Decade

Keiko Kim

14 papers receiving 1.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Psychometric assessment of subjective sleep quality using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI-J) in psychiatric disordered and control subjects

2000 747 citations Yuriko Doi, Masumi Minowa et al. Psychiatry Research profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Keiko Kim Japan	11	986	610	371	197	143	14	1.4k
Lauren Broch United States	4	1.3k 1.3×	945 1.5×	429 1.2×	202 1.0×	80 0.6×	4	1.6k
Melanie K. Means United States	19	1.4k 1.4×	1.0k 1.7×	484 1.3×	308 1.6×	153 1.1×	24	1.7k
Henry J. Orff United States	21	1.2k 1.2×	1.1k 1.7×	498 1.3×	201 1.0×	162 1.1×	35	1.8k
Jürgen Zulley Germany	21	1.3k 1.3×	1.1k 1.9×	625 1.7×	191 1.0×	103 0.7×	44	1.7k
Laisze Lee United States	15	1.0k 1.1×	485 0.8×	205 0.6×	216 1.1×	175 1.2×	19	1.4k
Yuichi Kamei Japan	22	1.4k 1.5×	1.0k 1.7×	964 2.6×	315 1.6×	111 0.8×	45	2.1k
Minori Enomoto Japan	20	790 0.8×	515 0.8×	486 1.3×	162 0.8×	78 0.5×	39	1.2k
Vivek Pillai United States	19	1.1k 1.2×	680 1.1×	339 0.9×	78 0.4×	248 1.7×	27	1.5k
Mandy Wai Man Yu Hong Kong	20	1.0k 1.0×	745 1.2×	347 0.9×	128 0.6×	181 1.3×	32	1.5k
Hirokuni Tagaya Japan	21	587 0.6×	634 1.0×	394 1.1×	125 0.6×	148 1.0×	72	1.2k

Countries citing papers authored by Keiko Kim

Since Specialization

Citations

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

Fields of papers citing papers by Keiko Kim

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiko Kim

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

All Works

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14 of 14 papers shown

Shibui, Kayo, Makoto Uchiyama, Keiko Kim, et al.. (2003). Melatonin, cortisol and thyroid-stimulating hormone rhythms are delayed in patients with delayed sleep phase syndrome. Sleep and Biological Rhythms. 1(3). 209–214. 8 indexed citations

Uchiyama, Makoto, Hiroyuki Suzuki, Kayo Shibui, et al.. (2002). Effects of nocturnal bright light on saliva melatonin, core body temperature and sleep propensity rhythms in human subjects. Neuroscience Research. 42(2). 115–122. 65 indexed citations

Tagaya, Hirokuni, Makoto Uchiyama, Kayo Shibui, et al.. (2002). Non-rapid-eye-movement sleep propensity after sleep deprivation in human subjects. Neuroscience Letters. 323(1). 17–20. 5 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

Okawa, Masako, Kayo Shibui, Keiko Kim, et al.. (2000). Altered phase relation between sleep timing and core body temperature rhythm in delayed sleep phase syndrome and non-24-hour sleep–wake syndrome in humans. Neuroscience Letters. 294(2). 101–104. 79 indexed citations

Kamei, Yuichi, Tatsuro Hayakawa, Jujiro Urata, et al.. (2000). Melatonin treatment for circadian rhythm sleep disorders. Psychiatry and Clinical Neurosciences. 54(3). 381–382. 36 indexed citations

Doi, Yuriko, Masumi Minowa, Makoto Uchiyama, et al.. (2000). Psychometric assessment of subjective sleep quality using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI-J) in psychiatric disordered and control subjects. Psychiatry Research. 97(2-3). 165–172. 747 indexed citations breakdown →

Hayakawa, Tatsuro, Makoto Uchiyama, T. Nakajima, et al.. (2000). Effects of small dose of brotizolam on P300. Psychiatry and Clinical Neurosciences. 54(3). 319–320. 5 indexed citations

Liu, Xianchen, Makoto Uchiyama, Kayo Shibui, et al.. (2000). Diurnal preference, sleep habits, circadian sleep propensity and melatonin rhythm in healthy human subjects. Neuroscience Letters. 280(3). 199–202. 74 indexed citations

10.

Liu, Xianchen, et al.. (2000). Prevalence and Correlates of Sleep Problems in Chinese Schoolchildren. SLEEP. 23(8). 1–10. 94 indexed citations

11.

Kudo, Yoshihisa, Makoto Uchiyama, Masako Okawa, et al.. (1999). Correlation between the circadian sleep propensity rhythm and hormonal rhythms under ultra‐short sleep–wake cycle. Psychiatry and Clinical Neurosciences. 53(2). 253–255. 10 indexed citations

12.

Uchiyama, Makoto, Masako Okawa, Kayo Shibui, et al.. (1999). Poor recovery sleep after sleep deprivation in delayed sleep phase syndrome. Psychiatry and Clinical Neurosciences. 53(2). 195–197. 22 indexed citations

13.

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

14.

Tomitaka, Shinichiro, et al.. (1999). Association between novelty seeking and dopamine receptor D4 (DRD4) exon III polymorphism in Japanese subjects. American Journal of Medical Genetics. 88(5). 469–471. 67 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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