Kazutoshi Hayashi

653 total citations
29 papers, 526 citations indexed

About

Kazutoshi Hayashi is a scholar working on Obstetrics and Gynecology, Reproductive Medicine and Surgery. According to data from OpenAlex, Kazutoshi Hayashi has authored 29 papers receiving a total of 526 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Obstetrics and Gynecology, 8 papers in Reproductive Medicine and 7 papers in Surgery. Recurrent topics in Kazutoshi Hayashi's work include Circadian rhythm and melatonin (7 papers), Uterine Myomas and Treatments (6 papers) and Endometriosis Research and Treatment (6 papers). Kazutoshi Hayashi is often cited by papers focused on Circadian rhythm and melatonin (7 papers), Uterine Myomas and Treatments (6 papers) and Endometriosis Research and Treatment (6 papers). Kazutoshi Hayashi collaborates with scholars based in Japan, United States and United Kingdom. Kazutoshi Hayashi's co-authors include Yuji Okatani, Yusuke Sagara, Akihiko Wakatsuki, Nobuyuki Morioka, Yorito Yamamoto, Kazushi Watanabe, Asahi Suzuki, Kenji Fukuzawa, Chiaki Izumiya and Nagamasa Maeda and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of Affective Disorders and Fertility and Sterility.

In The Last Decade

Kazutoshi Hayashi

27 papers receiving 508 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kazutoshi Hayashi Japan 12 222 191 113 111 92 29 526
B. J. Waddell Australia 16 104 0.5× 596 3.1× 310 2.7× 55 0.5× 114 1.2× 25 1.0k
David R. Hole United Kingdom 13 111 0.5× 88 0.5× 74 0.7× 261 2.4× 18 0.2× 17 585
Anna Kostrzewska Poland 11 52 0.2× 39 0.2× 46 0.4× 39 0.4× 70 0.8× 34 409
Christine Laborie France 20 240 1.1× 714 3.7× 211 1.9× 37 0.3× 42 0.5× 41 1.4k
Bérengère Coupé France 12 285 1.3× 340 1.8× 85 0.8× 21 0.2× 23 0.3× 15 863
Jooby Babu United States 5 89 0.4× 495 2.6× 181 1.6× 11 0.1× 45 0.5× 6 592
Mia J.T. Engelbregt Netherlands 7 56 0.3× 219 1.1× 88 0.8× 53 0.5× 9 0.1× 7 422
Marjorie Frankland United States 10 92 0.4× 131 0.7× 60 0.5× 26 0.2× 106 1.2× 23 604
Kathleen Page United States 6 53 0.2× 217 1.1× 55 0.5× 27 0.2× 24 0.3× 9 339
Gabriela Ravanelli Oliveira‐Pelegrin Brazil 13 59 0.3× 33 0.2× 15 0.1× 32 0.3× 73 0.8× 28 419

Countries citing papers authored by Kazutoshi Hayashi

Since Specialization
Citations

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

Fields of papers citing papers by Kazutoshi Hayashi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kazutoshi Hayashi

This figure shows the co-authorship network connecting the top 25 collaborators of Kazutoshi Hayashi. A scholar is included among the top collaborators of Kazutoshi Hayashi 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 Kazutoshi Hayashi. Kazutoshi Hayashi 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.
Hayashi, Kazutoshi, et al.. (2025). A novel vaginal manipulator for identifying vaginal canal separation line by visible and near-infrared transillumination light: PHARUS Pipe. Photodiagnosis and Photodynamic Therapy. 53. 104548–104548.
2.
Sato, Takayuki, et al.. (2024). Close Contact Transillumination Light Guides Surgeon to Vaginal Point Aa: Pharus Method for Robot‐Assisted Sacrocolpopexy. Asian Journal of Endoscopic Surgery. 18(1). e13412–e13412. 1 indexed citations
3.
Yamamoto, Yorito, et al.. (2017). Comparison of endometriotic cysts and ovarian cancer in association with endometriotic cysts. Cancer Treatment and Research Communications. 14. 26–29. 3 indexed citations
4.
5.
Ishikawa, Hiroshi, Kentaro Miyazaki, Tomoaki Ikeda, et al.. (2015). The Effects of Antenatal Corticosteroids on Short- and Long-Term Outcomes in Small-for-Gestational-Age Infants. International Journal of Medical Sciences. 12(4). 295–300. 22 indexed citations
6.
Miyazaki, Kentaro, Madoka Furuhashi, Kaoru Ishikawa, et al.. (2015). Long-term outcomes of antenatal corticosteroids treatment in very preterm infants after chorioamnionitis. Archives of Gynecology and Obstetrics. 292(6). 1239–1246. 14 indexed citations
7.
Maeda, Nagamasa, Yoshihiro Adachi, Tamotsu Takeuchi, et al.. (2008). Human leukocyte antigen-G, a ligand for the natural killer receptor KIR2DL4, is expressed by eutopic endometrium only in the menstrual phase. Fertility and Sterility. 91(2). 343–349. 23 indexed citations
8.
Yamamoto, Yorito, Nagamasa Maeda, Chiaki Izumiya, et al.. (2007). Decreased human leukocyte antigen–DR expression in the lipid raft by peritoneal macrophages from women with endometriosis. Fertility and Sterility. 89(1). 52–59. 6 indexed citations
9.
Zhang, Chunbin, Nagamasa Maeda, Chiaki Izumiya, et al.. (2006). Killer Immunoglobulin‐like Receptor and Human Leukocyte Antigen Expression as Immunodiagnostic Parameters for Pelvic Endometriosis. American Journal of Reproductive Immunology. 55(2). 106–114. 39 indexed citations
10.
Maeda, Nagamasa, Chiaki Izumiya, Yorito Yamamoto, et al.. (2005). Human leukocyte antigen expression by peritoneal macrophages from women with pelvic endometriosis is depressed but coordinated with costimulatory molecule expression. Fertility and Sterility. 83(4). 1232–1240. 11 indexed citations
11.
Hayashi, Kazutoshi & Yuji Okatani. (1999). Mechanisms underlying the effects of estrogen on nocturnal melatonin synthesis in peripubertal female rats: Relation to norepinephrine and adenylate cyclase. Journal of Pineal Research. 26(3). 178–183. 11 indexed citations
12.
Okatani, Yuji, Kazutoshi Hayashi, Kazushi Watanabe, Nobuyuki Morioka, & Yusuke Sagara. (1998). Effect of estrogen on melatonin synthesis in female peripubertal rats. Journal of Pineal Research. 24(2). 67–72. 9 indexed citations
13.
Okatani, Yuji, et al.. (1998). Maternal‐fetal transfer of melatonin in pregnant women near term. Journal of Pineal Research. 25(3). 129–134. 194 indexed citations
14.
Okatani, Yuji, Kazutoshi Hayashi, & Yusuke Sagara. (1998). Effect of estrogen on melatonin synthesis in female peripubertal rats as related to adenylate cyclase activity. Journal of Pineal Research. 25(4). 245–250. 15 indexed citations
15.
Okatani, Yuji, Kazutoshi Hayashi, Kazushi Watanabe, Nobuyuki Morioka, & Yusuke Sagara. (1998). Estrogen modulates the nocturnal synthesis of melatonin in peripubertal female rats. Journal of Pineal Research. 24(4). 224–229. 11 indexed citations
16.
Fujita, Yoshihito, et al.. (1997). Extracorporeal lung and heart assist (ECLHA) for catecholamine crisis and shock due to pheochromocytoma. Journal of the Japanese Society of Intensive Care Medicine. 4(2). 117–123. 1 indexed citations
17.
Okatani, Yuji, Kazushi Watanabe, Nobuyuki Morioka, Kazutoshi Hayashi, & Yusuke Sagara. (1997). Nocturnal changes in pineal melatonin synthesis during puberty: Relation to estrogen and progesterone levels in female rats. Journal of Pineal Research. 22(1). 33–41. 26 indexed citations
18.
Okatani, Yuji, Kazushi Watanabe, Kazutoshi Hayashi, Akihiko Wakatsuki, & Yusuke Sagara. (1997). Melatonin suppresses vasospastic effect of hydrogen peroxide in human umbilical artery: Relation to calcium influx. Journal of Pineal Research. 22(4). 232–237. 9 indexed citations
19.
Okatani, Yuji, et al.. (1997). Melatonin inhibits vasopastic action of hydrogen peroxide in human umbilical artery. Journal of Pineal Research. 22(3). 163–168. 16 indexed citations
20.
Matsubara, Yoshihiro, et al.. (1990). Clinical efficacy and safety of dobutamine hydrochloride: Patients' profiles.. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 21(4). 703–712. 1 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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