Keiichi Kumasawa

2.0k total citations
89 papers, 1.4k citations indexed

About

Keiichi Kumasawa is a scholar working on Obstetrics and Gynecology, Pediatrics, Perinatology and Child Health and Immunology. According to data from OpenAlex, Keiichi Kumasawa has authored 89 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Obstetrics and Gynecology, 35 papers in Pediatrics, Perinatology and Child Health and 28 papers in Immunology. Recurrent topics in Keiichi Kumasawa's work include Pregnancy and preeclampsia studies (37 papers), Reproductive System and Pregnancy (27 papers) and Birth, Development, and Health (16 papers). Keiichi Kumasawa is often cited by papers focused on Pregnancy and preeclampsia studies (37 papers), Reproductive System and Pregnancy (27 papers) and Birth, Development, and Health (16 papers). Keiichi Kumasawa collaborates with scholars based in Japan, United States and China. Keiichi Kumasawa's co-authors include Tadashi Kimura, Takuji Tomimatsu, Kazuya Mimura, Shinya Matsuzaki, Masahito Ikawa, Masayuki Endo, Hitomi Nakamura, Nobuyuki Takakura, Masaru Okabe and Hiroyasu Kidoya and has published in prestigious journals such as Proceedings of the National Academy of Sciences, SHILAP Revista de lepidopterología and Scientific Reports.

In The Last Decade

Keiichi Kumasawa

74 papers receiving 1.4k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Keiichi Kumasawa Japan	16	846	597	357	293	241	89	1.4k
Brian A. Kilburn United States	21	741 0.9×	529 0.9×	547 1.5×	266 0.9×	191 0.8×	39	1.3k
Hongjuan Ding China	23	808 1.0×	375 0.6×	288 0.8×	612 2.1×	173 0.7×	59	1.5k
Elizabeth A. Phipps United States	9	1.1k 1.3×	658 1.1×	337 0.9×	244 0.8×	185 0.8×	12	1.3k
Ana Sofia Cerdeira United Kingdom	21	1.4k 1.7×	916 1.5×	741 2.1×	393 1.3×	170 0.7×	51	2.0k
David Barrera Mexico	21	450 0.5×	294 0.5×	338 0.9×	284 1.0×	295 1.2×	47	1.4k
Kathie J. Whiteley Canada	19	1.1k 1.3×	884 1.5×	401 1.1×	420 1.4×	130 0.5×	23	1.6k
Ofer Beharier Israel	20	518 0.6×	337 0.6×	137 0.4×	361 1.2×	132 0.5×	57	1.3k
Takayuki Iriyama Japan	16	477 0.6×	265 0.4×	198 0.6×	130 0.4×	122 0.5×	96	877
Gail Harger United States	18	1.1k 1.3×	921 1.5×	331 0.9×	131 0.4×	152 0.6×	27	1.4k
Ludivine Doridot France	19	502 0.6×	242 0.4×	453 1.3×	468 1.6×	65 0.3×	36	1.5k

Countries citing papers authored by Keiichi Kumasawa

Since Specialization

Citations

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

Fields of papers citing papers by Keiichi Kumasawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Kumasawa

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

All Works

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20 of 20 papers shown

Ichinose, Mari, Seisuke Sayama, Ayako Hashimoto, et al.. (2025). Hysteroscopic Endometrial Defect Following Adenomyomectomy and Incidence of Placenta Accreta Spectrum and Uterine Rupture Complications for Subsequent Pregnancy. Reproductive Sciences. 32(2). 467–473. 3 indexed citations

Wada‐Hiraike, Osamu, et al.. (2025). Risk factors for failed induction of labor: A retrospective study in a single, tertiary, perinatal-care center. Taiwanese Journal of Obstetrics and Gynecology. 64(4). 687–692. 1 indexed citations

Kumasawa, Keiichi, Seisuke Sayama, Takayuki Iriyama, et al.. (2024). The Effects of Low Concentrations of Pravastatin on Placental Cells. Reproductive Sciences. 31(10). 3139–3147. 3 indexed citations

Sayama, Seisuke, Takayuki Iriyama, Kumi Nakazaki, et al.. (2023). A successful management of refractory immune thrombocytopenic purpura with Eltrombopag during pregnancy complicated with superimposed preeclampsia. Oxford Medical Case Reports. 2023(5). omad047–omad047. 1 indexed citations

Fujii, T., Keiichi Kumasawa, Mari Ichinose, et al.. (2023). The sFlt-1/PlGF Ratio Trend Is Useful in Predicting Preeclampsia Severity in Hyperreactio Luteinalis Complicated with Preeclampsia. Case Reports in Obstetrics and Gynecology. 2023. 1–5.

Nakajima, Keisuke, T. Fujii, Takayuki Iriyama, et al.. (2023). Efficacy of prompt administration of cryoprecipitate in severe postpartum hemorrhage of preeclampsia patients. Journal of obstetrics and gynaecology research. 49(12). 2811–2816. 3 indexed citations

Kato, Kosuke, Takayuki Iriyama, Konan Hara, et al.. (2023). Increased risk of placenta previa and preterm birth in pregnant women with endometriosis/adenomyosis: A propensity‐score matching analysis of a nationwide perinatal database in Japan. Journal of obstetrics and gynaecology research. 50(3). 351–357. 2 indexed citations

Koga, Kaori, Keiichi Kumasawa, Ayumi Taguchi, et al.. (2022). Impact of Chronic Exposure to Endometriosis on Perinatal Outcomes: Establishment of a Mouse Model. Biomedicines. 10(10). 2627–2627. 3 indexed citations

Nakanishi, Megumi, Takayuki Iriyama, Seisuke Sayama, et al.. (2022). Pregnancy‐induced hemorrhagic degeneration of adenomyosis. Journal of obstetrics and gynaecology research. 48(5). 1265–1270. 5 indexed citations

10.

Ichinose, Mari, Takayuki Iriyama, Seisuke Sayama, et al.. (2022). Postpartum degeneration of adenomyosis with diffuse cyst‐like changes and localized hemorrhage detected by sequential magnetic resonance imaging. Journal of obstetrics and gynaecology research. 48(11). 2973–2978. 2 indexed citations

11.

Iriyama, Takayuki, Seisuke Sayama, Kaori Kubota, et al.. (2022). The impact of fetal growth restriction in diagnosing preeclampsia on the severity of maternal features. Journal of obstetrics and gynaecology research. 48(4). 912–919. 4 indexed citations

12.

Nagamatsu, Takeshi, Kazuki Morita, Ayumi Taguchi, et al.. (2021). Suppression of human trophoblast syncytialization by human cytomegalovirus infection. Placenta. 117. 200–208. 13 indexed citations

13.

Nagamatsu, Takeshi, Takayuki Iriyama, Toshio Nakayama, et al.. (2020). Impact of additional risk factors on the incidence of preterm delivery among pregnant women diagnosed with short cervix. Taiwanese Journal of Obstetrics and Gynecology. 59(2). 195–199. 7 indexed citations

14.

Kumasawa, Keiichi, Takayuki Iriyama, Takeshi Nagamatsu, Yutaka Osuga, & Tomoyuki Fujii. (2020). Pravastatin for preeclampsia: From animal to human. Journal of obstetrics and gynaecology research. 46(8). 1255–1262. 12 indexed citations

15.

Kumasawa, Keiichi, Kaori Kubota, Yuko Takahashi, et al.. (2020). Abdominal compartment syndrome complicated by preeclampsia and partial HELLP syndrome in a 45‐year‐old woman: A case report. SHILAP Revista de lepidopterología. 8(7). 1251–1254. 2 indexed citations

16.

Nakamura, Hitomi, Takayoshi Hosono, Takeshi Taniguchi, et al.. (2018). Prediction of pregnancy after frozen‐thawed embryo transfer via in vivo intrauterine oxidation‐reduction potential measurements: a pilot study. Reproductive Medicine and Biology. 17(3). 255–261. 3 indexed citations

17.

Sawada, Masaaki, Shinya Matsuzaki, Aiko Kakigano, et al.. (2017). Treatment and repair of uterine scar dehiscence during cesarean section. Clinical Case Reports. 5(2). 145–149. 13 indexed citations

18.

Matsuzaki, Shinya, Kiyoshi Yoshino, Masayuki Endo, et al.. (2017). Successful anticoagulant therapy for disseminated intravascular coagulation during conservative management of placenta percreta: a case report and literature review. BMC Pregnancy and Childbirth. 17(1). 443–443. 12 indexed citations

19.

Matsuzaki, Shinya, Shinya Matsuzaki, Satoko Matsuzaki, et al.. (2016). Placenta accreta following hysteroscopic myomectomy. Clinical Case Reports. 4(6). 541–544. 12 indexed citations

20.

Kumasawa, Keiichi, Masahito Ikawa, Hiroyasu Kidoya, et al.. (2010). Pravastatin induces placental growth factor (PGF) and ameliorates preeclampsia in a mouse model. Proceedings of the National Academy of Sciences. 108(4). 1451–1455. 286 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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