Koichi Oba

2.1k total citations · 1 hit paper
23 papers, 1.6k citations indexed

About

Koichi Oba is a scholar working on Genetics, Surgery and Molecular Biology. According to data from OpenAlex, Koichi Oba has authored 23 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Genetics, 6 papers in Surgery and 5 papers in Molecular Biology. Recurrent topics in Koichi Oba's work include Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities (7 papers), Estrogen and related hormone effects (6 papers) and Sexual Differentiation and Disorders (5 papers). Koichi Oba is often cited by papers focused on Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities (7 papers), Estrogen and related hormone effects (6 papers) and Sexual Differentiation and Disorders (5 papers). Koichi Oba collaborates with scholars based in Japan, United Kingdom and China. Koichi Oba's co-authors include Toshihiko Yanase, Yasuo Imanishi, Kiminobu Goto, Akimitsu Miyauchi, Taijiro Okabe, Östen Ljunggren, Kenneth B. Jonsson, Jeffrey R. Lavigne, Masatoshi Nomura and Hiroyuki Koshiyama and has published in prestigious journals such as New England Journal of Medicine, The Journal of Clinical Endocrinology & Metabolism and Biochemical and Biophysical Research Communications.

In The Last Decade

Koichi Oba

23 papers receiving 1.6k 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.

Fibroblast Growth Factor 23 in Oncogenic Osteomalacia and X-Linked Hypophosphatemia

2003 683 citations Kenneth B. Jonsson, R Zahradnik et al. New England Journal of Medicine profile →

Peers

Countries citing papers authored by Koichi Oba

Since Specialization

Citations

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

Fields of papers citing papers by Koichi Oba

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koichi Oba

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Oba. A scholar is included among the top collaborators of Koichi Oba 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 Koichi Oba. Koichi Oba 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	The Correlation between Femoral Anteversion and Femoral Condyle Rotation in Patients with Osteoarthritis of the Hip Joint: Investigation about the Asian Female Patients 2017 ·Open Journal of Orthopedics ·(unknown), Hiroshi Mikami, Koichi Oba, (unknown), Michihiro Takai, (unknown)	1
2	Cementless calcar-replacement stem with integrated greater trochanter plate for unstable intertrochanteric fracture in very elderly patients 2017 ·Journal of orthopaedic surgery ·Keizo Wada, Hiroshi Mikami, Koichi Oba, (unknown), Koichi Sairyo	10
3	Anteversion of the Acetabular Component Aligned With the Transverse Acetabular Ligament in Total Hip Arthroplasty 2011 ·The Journal of Arthroplasty ·Hideaki Miyoshi, Hiroshi Mikami, Koichi Oba, (unknown)	30
4	Matrix extracellular phosphoglycoprotein is expressed in causative tumors of oncogenic osteomalacia 2011 ·Journal of Bone and Mineral Metabolism ·Yasuo Imanishi, Jun Hashimoto, Wataru Ando, Keisuke Kobayashi, Takafumi Ueda, Yuki Nagata, Akimitsu Miyauchi, (unknown), Hiroshi Kaji, Takatoshi Saito, Koichi Oba, Yasato Komatsu, Tomoaki Morioka, Katsuhito Mori, Takami Miki, Masaaki Inaba	27
5	Role of tumour necrosis factor- (TNF ) in the functional properties of hyalocytes 2010 ·British Journal of Ophthalmology ·Y. Hata, Shintaro Nakao, (unknown), Koichi Oba, Takeshi Kita, (unknown), Yukio Sassa, Alexander Schering, Tomohiko Ishibashi	10
6	The Levels of Somatostatin Receptors in Causative Tumors of Oncogenic Osteomalacia Are Insufficient for Their Agonist to Normalize Serum Phosphate Levels 2010 ·Calcified Tissue International ·Akira Ishii, Yasuo Imanishi, Keisuke Kobayashi, Jun Hashimoto, Takafumi Ueda, Akimitsu Miyauchi, (unknown), Hiroshi Kaji, Takatoshi Saito, Koichi Oba, Yasato Komatsu, Masafumi Kurajoh, Yuki Nagata, Hitoshi Goto, Kenichi Wakasa, Toshitsugu Sugimoto, Takami Miki, Masaaki Inaba, Yoshiki Nishizawà	14
7	APPLICATION OF THE “ASR SERIES” AC SERVO MOTOR DRIVEN HYDRAULIC PUMP TO INJECTION MOLDING MACHINES 2008 ·Proceedings of the JFPS International Symposium on Fluid Power ·Kenichi Takaku, (unknown), Koichi Oba	5
8	Lumbar radiculopathy caused by extradural rheumatoid nodules 2007 ·Journal of Neurosurgery Spine ·(unknown), Toshinori Sakai, Koichi Sairyo, Koichi Oba, Kosaku Higashino, Shinsuke Katoh, Natsuo Yasui	5
9	Treatment of dysplastic osteoarthritis with labral tear by Chiari pelvic osteotomy: outcomes after more than 10 years follow-up 2007 ·Archives of Orthopaedic and Trauma Surgery ·Shunji Nakano, (unknown), Daisuke Hamada, Hirofumi Kosaka, Kiminori Yukata, Koichi Oba, (unknown), Hideaki Miyoshi, Hiroshi Egawa, (unknown), Natsuo Yasui	9
10	Functional characterization of a new human Ad4BP/SF-1 variation, G146A 2003 ·Biochemical and Biophysical Research Communications ·WuQiang Fan, Toshihiko Yanase, Wei Liu, Koichi Oba, Masatoshi Nomura, Taijiro Okabe, Kiminobu Goto, Hajime Nawata	35
11	Protein Kinase A Potentiates Adrenal 4 Binding Protein/Steroidogenic Factor 1 Transactivation by Reintegrating the Subcellular Dynamic Interactions of the Nuclear Receptor with Its Cofactors, General Control Nonderepressed-5/Transformation/ Transcription Domain-Associated Protein, and Suppressor, Dosage-Sensitive Sex Reversal-1: a Laser Confocal Imaging Study in Living KGN Cells 2003 ·Molecular Endocrinology ·WuQiang Fan, Toshihiko Yanase, Yin Wu, Hisaya Kawate, Masayuki Saitoh, Koichi Oba, Masatoshi Nomura, Taijiro Okabe, Kiminobu Goto, Junn Yanagisawa, Shigeaki Kato, Ryoichi Takayanagi, Hajime Nawata	49
12	Fibroblast Growth Factor 23 in Oncogenic Osteomalacia and X-Linked Hypophosphatemia breakdown → 2003 ·New England Journal of Medicine ·Kenneth B. Jonsson, R Zahradnik, Tobias E. Larsson, Kenneth E. White, Toshitsugu Sugimoto, Yasuo Imanishi, Takehisa Yamamoto, Geeta Hampson, Hiroyuki Koshiyama, Östen Ljunggren, Koichi Oba, In Myung Yang, Akimitsu Miyauchi, Michael J. Econs, Jeffrey R. Lavigne, Harald Jüppner	683
13	Human Pituitary Tumor Transforming Gene (hPTTG) Inhibits Human Lung Cancer A549 Cell Growth through Activation of p21<sup>WAF1/CIP1 </sup> 2003 ·Endocrine Journal ·Yi-Ming Mu, Koichi Oba, Toshihiko Yanase, (unknown), Kenji Ashida, Kiminobu Goto, Hidetaka Morinaga, Shoichiro Ikuyama, Ryoichi Takayanagi, Hajime Nawata	32
14	FGF-23 is a circulating factor that is elevated in oncogenic osteomalacia and X-linked hypophosphatemic rickets. 2002 ·Journal of Bone and Mineral Research ·Kenneth B. Jonsson, R Zahradnik, (unknown), Kenneth E. White, Geeta Hampson, A. Miyauchi, Östen Ljunggren, Hiroyuki Koshiyama, T. Sugimoto, Koichi Oba, Takehisa Yamamoto, Yasuo Imanishi, Michael J. Econs, Jeffrey R. Lavigne, Harald Jüeppner	8
15	Tumor-induced osteomalacia in a patient with a phosphaturic mesenchymal tumor revealing feature of an ossifying fasciitis of the left abdominal wall. 2002 ·Nihon Naika Gakkai Zasshi ·Koichi Oba, Akira Takei, Shoichi Natori, Ken Arai, Kazuo Nakanishi, Yoshinao Oda	1
16	Transcriptional Regulation of the Human FTZ-F1 Gene Encoding Ad4BP/SF-1 2000 ·The Journal of Biochemistry ·Koichi Oba, T Yanase, Isao Ichino, (unknown), R. Takayanagi, H Nawata	20
17	Human Ad4BP/SF-1 and its related nuclear receptor 1999 ·The Journal of Steroid Biochemistry and Molecular Biology ·H Nawata, T Yanase, Koichi Oba, Isao Ichino, Masayuki Saito, (unknown), Shoichiro Ikuyama, Hiroki Sakai, R. Takayanagi	6
18	Dax-1 as One of the Target Genes of Ad4BP/SF-1 1999 ·Molecular Endocrinology ·Ken Kawabe, (unknown), Hisae Tsuboi, Sanae Oka, Koichi Oba, Toshihiko Yanase, Hajime Nawata, Ken-ichirou Morohashi	100
19	Structural Characterization of HumanAd4bp (SF-1)Gene 1996 ·Biochemical and Biophysical Research Communications ·Koichi Oba, Toshihiko Yanase, Masatoshi Nomura, Ken-ichirou Morohashi, Ryoichi Takayanagi, Hajime Nawata	57
20	New mutations of DAX-1 genes in two Japanese patients with X-linked congenital adrenal hypoplasia and hypogonadotropic hypogonadism. 1996 ·The Journal of Clinical Endocrinology & Metabolism ·Toshihiko Yanase, R. Takayanagi, Koichi Oba, Yoshihiro Nishi, Kenji Ohe, H Nawata	39

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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