Koso Ohama

5.5k total citations · 1 hit paper
150 papers, 4.3k citations indexed

About

Koso Ohama is a scholar working on Genetics, Pediatrics, Perinatology and Child Health and Molecular Biology. According to data from OpenAlex, Koso Ohama has authored 150 papers receiving a total of 4.3k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Genetics, 34 papers in Pediatrics, Perinatology and Child Health and 32 papers in Molecular Biology. Recurrent topics in Koso Ohama's work include Prenatal Screening and Diagnostics (30 papers), Ovarian cancer diagnosis and treatment (14 papers) and Menopause: Health Impacts and Treatments (14 papers). Koso Ohama is often cited by papers focused on Prenatal Screening and Diagnostics (30 papers), Ovarian cancer diagnosis and treatment (14 papers) and Menopause: Health Impacts and Treatments (14 papers). Koso Ohama collaborates with scholars based in Japan, United States and Sweden. Koso Ohama's co-authors include Tadashi Kajii, Kazushi Shigemasa, Mitsuhiro Sanada, Mikio Tsuda, Norio Miharu, Akira Taguchi, Yoshikazu Suei, Nobutaka Nagai, Tetsuaki Hara and N. Nagai and has published in prestigious journals such as Nature, The Lancet and Journal of the American College of Cardiology.

In The Last Decade

Koso Ohama

146 papers receiving 4.1k 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.

Androgenetic origin of hydatidiform mole

1977 506 citations Koso Ohama et al. profile →

Peers

Countries citing papers authored by Koso Ohama

Since Specialization

Citations

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

Fields of papers citing papers by Koso Ohama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koso Ohama

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

#	Work	Indexed citations
1	Cyclic and characteristic expression of phosphorylated Akt in human endometrium and decidual cells in vivo and in vitro 2005 ·Human Reproduction ·(unknown), Tetsuaki Hara, Takashi Taguchi, (unknown), Koso Ohama, Yoshiki Kudo	37
2	Pregnancy rate, multiple pregnancy rate, and embryo quality: Clues for single blastocyst transfer from double blastocyst transfer in an unselected population 2005 ·Reproductive Medicine and Biology ·Tetsuaki Hara, (unknown), T. Kusuda, Koso Ohama	3
3	Indoleamine 2,3-dioxygenase: distribution and function in the developing human placenta 2004 ·Journal of Reproductive Immunology ·Yoshiki Kudo, C.A.R. Boyd, (unknown), Christopher W.G. Redman, Osamu Takikawa, (unknown), Tetsuaki Hara, Koso Ohama, Ian L. Sargent	102
4	Apolipoprotein E phenotype affects the malondialdehyde‐modified LDL concentration and forearm endothelial function in postmenopausal women 2004 ·Clinical Endocrinology ·Mikio Tsuda, Mitsuhiro Sanada, Yukihito Higashi, Yoshiko Hara, Ichiro Kodama, Kazuaki Chayama, Masao Yoshizumi, Koso Ohama	3
5	Dental panoramic radiograph as a tool to detect postmenopausal women with low bone mineral density: untrained general dental practitioners' diagnostic performance 2003 ·Osteoporosis International ·(unknown), Madeleine Rohlin, Yoshikazu Suei, Keiji Tanimoto, Mikio Tsuda, Mitsuhiro Sanada, Junichiro Takahashi, Takashi Nakamoto, Akira Taguchi, Masahiko Ohtsuka, Koso Ohama	107
6	Association of estrogen and vitamin D receptor gene polymorphisms with tooth loss and oral bone loss in Japanese postmenopausal women 2003 ·Menopause The Journal of The North American Menopause Society ·Akira Taguchi, Junya Kobayashi, Yoshikazu Suei, Masahiko Ohtsuka, Takashi Nakamoto, Keiji Tanimoto, Mitsuhiro Sanada, Mikio Tsuda, Koso Ohama	21
7	Combination therapy of low-dose medroxyprogesterone acetate and oral estrogen does not affect endothelial function in the forearms of postmenopausal women 2002 ·Menopause The Journal of The North American Menopause Society ·Mitsuhiro Sanada, Yukihito Higashi, Keigo Nakagawa, Mikio Tsuda, Ichiro Kodama, Nobutaka Nagai, Kazuaki Chayama, Koso Ohama	6
8	Hormone Replacement Effects on Endothelial Function Measured in the Forearm Resistance Artery in Normocholesterolemic and Hypercholesterolemic Postmenopausal Women 2002 ·The Journal of Clinical Endocrinology & Metabolism ·Mitsuhiro Sanada, Yukihito Higashi, Keigo Nakagawa, Mikio Tsuda, Ichiro Kodama, Masashi Kimura, Kazuaki Chayama, Koso Ohama	29
9	Quantitation of fetal DNA in maternal serum in normal and aneuploid pregnancies 2001 ·Human Genetics ·Yoko Ohashi, Norio Miharu, Hiroshi Honda, Osamu Samura, Koso Ohama	32
10	Effect of Estrogen Replacement Therapy on Endothelial Function of Peripheral Resistance Artery in Postmenopausal Women - Comparison of Normotensive Subjects and Hypertensive Patients - 2000 ·Hypertension ·Yukihito Higashi, Mitsuhiro Sanada, Shota Sasaki, Keigo Nakagawa, Koso Ohama, Hideo Matsuura, Goro Kajiyama, Tetsuya Oshima	2
11	Meiotic segregation analysis of a 14;21 Robertsonian translocation carrier by fluorescence in situ hybridization 2000 ·Human Genetics ·Hiroshi Honda, Norio Miharu, Osamu Samura, Hongbo He, Koso Ohama	43
12	A case of malignant brenner tumor of the ovary. 1999 ·The Journal of the Japanese Society of Clinical Cytology ·(unknown), Nobutaka Nagai, (unknown), (unknown), (unknown), Kazushi Shigemasa, Koso Ohama	0
13	Characteristic changes of large granular lymphocytes that strongly express CD56 in endometrium during the menstrual cycle and early pregnancy 1998 ·Human Reproduction ·T. Kodama, Takahito Hara, Eri Okamoto, Yasuo Kusunoki, Koso Ohama	41
14	Telomerase activity in ovarian tumors 1997 ·Cancer ·Junko Murakami, Nobutaka Nagai, Koso Ohama, Hidetoshi Tahara, Toshinori Ide	40
15	A Phenotypically Normal Liveborn Male after Prenatal Diagnosis of Trisomy 20 Mosaicism 1997 ·Journal of obstetrics and gynaecology research ·Satoshi Hayashi, Norio Miharu, (unknown), Hiroshi Honda, Osamu Samura, Yoshiharu Nakaoka, Koso Ohama	0
16	Detection of chromosomal abnormalities in uterine leiomyoma using conventional cytogenetic method and interphase fluorescence in situ hybridization 1996 ·Cancer Genetics and Cytogenetics ·Satoshi Hayashi, Norio Miharu, (unknown), Osamu Samura, Tetsuaki Hara, Koso Ohama	14
17	258. Cytogenetic Study of Down's Syndrome 1984 ·日本産科婦人科學會雜誌 ·Hitoshi Teramoto, Eri Okamoto, Osamu Yoshimura, Koso Ohama, (unknown)	1
18	[Cytogenetic studies of multiple ovarian dermoid cysts in a single host]. 1983 ·PubMed ·(unknown), Koso Ohama, Emi Okamoto, Akira Fujiwara	5
19	Genetic studies of hydatidiform mole with 46,XY karyotype 1981 ·Koso Ohama, Eri Okamoto, (unknown), (unknown), Yoshiko Fukuda	1
20	Chromosomal Anomalies and Sex Ratio of Induced Abortuses in Early Embryogenesis 1978 ·Koso Ohama	2

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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