Yoko Hamai

714 total citations
22 papers, 591 citations indexed

About

Yoko Hamai is a scholar working on Immunology, Public Health, Environmental and Occupational Health and Obstetrics and Gynecology. According to data from OpenAlex, Yoko Hamai has authored 22 papers receiving a total of 591 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Immunology, 8 papers in Public Health, Environmental and Occupational Health and 7 papers in Obstetrics and Gynecology. Recurrent topics in Yoko Hamai's work include Reproductive System and Pregnancy (12 papers), Endometriosis Research and Treatment (5 papers) and Pregnancy and preeclampsia studies (4 papers). Yoko Hamai is often cited by papers focused on Reproductive System and Pregnancy (12 papers), Endometriosis Research and Treatment (5 papers) and Pregnancy and preeclampsia studies (4 papers). Yoko Hamai collaborates with scholars based in Japan and United States. Yoko Hamai's co-authors include Shiro Kōzuma, Tomoyuki Fujii, Takahiro Yamashita, Yuji Taketani, Akinori Miki, Yuji Taketani, Hironobu Hyodo, Hidenori Nishina, Nobuya Unno and Akihiko Ohta and has published in prestigious journals such as Human Reproduction, Surface and Coatings Technology and Neuroscience Letters.

In The Last Decade

Yoko Hamai

21 papers receiving 571 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Yoko Hamai Japan	14	331	207	149	143	121	22	591
K. Clark United States	13	59 0.2×	261 1.3×	84 0.6×	280 2.0×	37 0.3×	39	657
K Shirakawa Japan	15	65 0.2×	204 1.0×	59 0.4×	88 0.6×	71 0.6×	41	601
A. T. Letchworth United Kingdom	16	51 0.2×	328 1.6×	86 0.6×	248 1.7×	92 0.8×	37	816
Matthew T. Rätsep Canada	13	157 0.5×	323 1.6×	37 0.2×	272 1.9×	31 0.3×	17	515
Marek Kudła Poland	16	32 0.1×	155 0.7×	72 0.5×	40 0.3×	171 1.4×	46	654
Y. Ehara United States	13	46 0.1×	20 0.1×	132 0.9×	50 0.3×	473 3.9×	18	856
Nikolaos Makris Greece	11	52 0.2×	134 0.6×	68 0.5×	18 0.1×	91 0.8×	29	377
Anna Cappellini Italy	14	46 0.1×	193 0.9×	78 0.5×	317 2.2×	41 0.3×	32	817
Ruurd de Graaf Netherlands	12	88 0.3×	81 0.4×	84 0.6×	107 0.7×	50 0.4×	15	453
Krzysztof Sodowski Poland	11	23 0.1×	533 2.6×	39 0.3×	103 0.7×	479 4.0×	43	815

Countries citing papers authored by Yoko Hamai

Since Specialization

Citations

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

Fields of papers citing papers by Yoko Hamai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Yoko Hamai

This figure shows the co-authorship network connecting the top 25 collaborators of Yoko Hamai. A scholar is included among the top collaborators of Yoko Hamai 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 Yoko Hamai. Yoko Hamai 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

Hamai, Yoko & Yukio Imanishi. (2011). Efforts to promote vaginal delivery after a previous cesarean section. Journal of obstetrics and gynaecology research. 38(1). 113–117. 1 indexed citations

Kanai, Takao, Tomoyuki Fujii, Nobuya Unno, et al.. (2001). Human Leukocyte Antigen-G-Expressing Cells Differently Modulate the Release of Cytokines from Mononuclear Cells Present in the Decidua Versus Peripheral Blood. American Journal of Reproductive Immunology. 45(2). 94–99. 94 indexed citations

Marumo, Genzo, S. Kozuma, Yoko Hamai, et al.. (2001). Generation of Periventricular Leukomalacia by Repeated Umbilical Cord Occlusion in Near-Term Fetal Sheep and Its Possible Pathogenetical Mechanisms. Neonatology. 79(1). 39–45. 24 indexed citations

Miki, A., Yoko Hamai, Takahiro Yamashita, et al.. (2000). Immunotherapy Prevents Recurrent Abortion Without Influencing Natural Killer Receptor Status. American Journal of Reproductive Immunology. 43(2). 98–106. 3 indexed citations

Kanai, T., Shiro Kōzuma, Yoko Hamai, et al.. (2000). Theoretical Basis for Herbal Medicines, Tokishakuyaku‐San and Sairei‐To, in the Treatment of Autoimmunity‐Related Recurrent Abortion by Correcting T Helper‐1/T Helper‐2 Balance. American Journal of Reproductive Immunology. 44(6). 342–346. 18 indexed citations

Yamashita, Takahiro, Tomoyuki Fujii, Katsushi Tokunaga, et al.. (1999). Analysis of Human Leukocyte Antigen‐G Polymorphism Including Intron 4 in Japanese Couples with Habitual Abortion. American Journal of Reproductive Immunology. 41(2). 159–163. 34 indexed citations

Fujii, Takao, Yoko Hamai, S. Kozuma, et al.. (1999). Effects of Sairei-to and Tokishakuyaku-sa on cytokine release fromperipheral blood mononuclear cells upon recognition of HLA-Gprotein in the treatment of recurrent abortion. Methods and Findings in Experimental and Clinical Pharmacology. 21(4). 261–261. 8 indexed citations

Hamai, Yoko, Tomoyuki Fujii, Akinori Miki, et al.. (1999). The Expression of Human Leukocyte Antigen‐G on Trophoblasts Abolishes the Growth‐Suppressing Effect of Interleukin‐2 towards Them. American Journal of Reproductive Immunology. 41(2). 153–158. 22 indexed citations

Marumo, Genzo, Hiroshi Ozawa, Sachio Takashima, et al.. (1999). Early axonal and glial pathology in fetal sheep brains with leukomalacia induced by repeated umbilical cord occlusion. Brain and Development. 21(4). 248–252. 46 indexed citations

10.

Hamai, Yoko, Tomoyuki Fujii, Akinori Miki, et al.. (1999). Quantitative Assessment of Human Leukocyte Antigen‐G Protein in Amniotic Fluid by a Double‐Determinant Enzyme‐Linked Immunosorbent Assay Using Anti‐Human Leukocyte Antigen‐G‐Specific Antibody ‘87G’. American Journal of Reproductive Immunology. 41(4). 293–295. 14 indexed citations

11.

Hamai, Yoko, et al.. (1998). Secretion of Interleukin‐2 from Unstimulated Peripheral Blood Mononuclear Cells Is a Possible Pathogenic Mechanism in Recurrent Abortion. American Journal of Reproductive Immunology. 40(1). 63–64. 13 indexed citations

12.

Hamai, Yoko, et al.. (1998). Evidence for basic fibroblast growth factor as a crucial angiogenic growth factor, released from human trophoblasts during early gestation. Placenta. 19(2-3). 149–155. 24 indexed citations

13.

Fujii, Tomoyuki, Takahiro Yamashita, Yoko Hamai, et al.. (1998). Immunotherapy Before and During Pregnancy Improves Pregnancy Outcome in Women Who Suffer from Recurrent Abortion and Did Not Benefit from Immunotherapy Before Pregnancy. American Journal of Reproductive Immunology. 39(1). 12–15. 8 indexed citations

14.

Hamai, Yoko, Tomoyuki Fujii, Takahiro Yamashita, et al.. (1998). Peripheral Blood Mononuclear Cells from Women with Recurrent Abortion Exhibit an Aberrant Reaction to Release Cytokines upon the Direct Contact of Human Leukocyte Antigen‐G‐Expressing Cells. American Journal of Reproductive Immunology. 40(6). 408–413. 18 indexed citations

15.

Hamai, Yoko, et al.. (1997). A case of pregnancy in a woman with cloacal dysgenesis and a rudimentary uterine horn. Human Reproduction. 12(5). 1103–1105. 14 indexed citations

16.

Hamai, Yoko, Tomoyuki Fujii, Takahiro Yamashita, et al.. (1997). Pathogenetic Implication of Interleukin‐2 Expressed in Preeclamptic Decidual Tissues: A Possible Mechanism of Deranged Vasculature of the Placenta Associated with Preeclampsia. American Journal of Reproductive Immunology. 38(2). 83–88. 19 indexed citations

17.

Hamai, Yoko, et al.. (1997). Differential clinical courses of pregnancies complicated by diabetes insipidus which does, or does not, pre-date the pregnancy. Human Reproduction. 12(8). 1816–1818. 12 indexed citations

18.

Hamai, Yoko, Tomoyuki Fujii, Takahiro Yamashita, et al.. (1997). Evidence for an Elevation in Serum Interleukin‐2 and Tumor Necrosis Factor‐α Levels Before the Clinical Manifestations of Preeclampsia. American Journal of Reproductive Immunology. 38(2). 89–93. 111 indexed citations

19.

Ohta, Akihiko, Hiroshi Takagi, Toshiyasu Matsui, et al.. (1993). Localization of nitric oxide synthase-immunoreactive neurons in the solitary nucleus and ventrolateral medulla oblongata of the rat: their relation to catecholaminergic neurons. Neuroscience Letters. 158(1). 33–35. 86 indexed citations

20.

Hamai, Yoko, et al.. (1988). Asymptomatic hyperbromidaemia detected as pseudohyperchloridaemia measured with an ion selective electrode meter. Scandinavian Journal of Clinical and Laboratory Investigation. 48(2). 177–182. 4 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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