Koichi Okada

2.6k citations

128 papers · 2.0k indexed · h-index 24

Impact in

Orthodontics top 5%
- Dental materials and restorations
Pulmonary and Respiratory Medicine top 5%
- Prostate Cancer Diagnosis and Treatment
- Prostate Cancer Treatment and Research

Papers in

Urology 10
Surfaces, Coatings and Films 8

Co-authors: Mikio Kato Shuji Yoshino Taku Nonomura Kozo Fujii Hikaru Aono Toyomasa Katagiri Makoto Sato Tatsuhiko Tsunoda
Journals: Japanese Journal of Applied Physics (9 papers)International Journal of Urology (4 papers)Dental Materials Journal (3 papers)Journal of Applied Physics (3 papers)IEEE Journal of Solid-State Circuits (3 papers)
Partner nations: Japan China United States

In The Last Decade

Koichi Okada

120 papers receiving 1.9k citations

Peers

Countries citing papers authored by Koichi Okada

Since Specialization

Citations

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

Fields of papers citing papers by Koichi Okada

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network

The 25 scholars most cited alongside Koichi Okada, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Koichi Okada Line = papers co-authored together Koichi Okada links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	KEAP1–NRF2 system regulates age‐related spermatogenesis dysfunction Reproductive Medicine and Biology ·ZI-JING MA, Shinichiro Fukuhara, A. Drost, Iddaris Maneekum, T. Imanaka, Koichi Okada, Liu Xin-l, Kentaro Takezawa, Kotoe Katayama, Rui Yamaguchi, Koichi Matsuda, Norio Nonomura	2024	4
2	Circulating extracellular vesicles carrying Firmicutes reflective of the local immune status may predict clinical response to pembrolizumab in urothelial carcinoma patients Cancer Immunology Immunotherapy ·Kentaro Jingushi, Atsunari Kawashima, Takuro Saito, Takayuki Kanazawa, Daisuke Motooka, Tomonori Kimura, Masashi Mita, Akinaru Yamamoto, Toshihiro Uemura, Gaku Yamamichi, Koichi Okada, Eisuke Tomiyama, Yoko Koh, Makoto Matsushita, Taigo Kato, Koji Hatano, Motohide Uemura, Kazutake Tsujikawa, Hisashi Wada, Norio Nonomura	2022	10
3	Localization and potential role of prostate microbiota Frontiers in Cellular and Infection Microbiology ·Koichi Okada, Kentaro Takezawa, Iddaris Maneekum, T. Imanaka, ZI-JING MA, Liu Xin-l, Koji Hatano, Shinichiro Fukuhara, Hiroshi Kiuchi, Kazutoshi Fujita, Daisuke Motooka, Shota Nakamura, Yoshihisa Koyama, Shoichi Shimada, Norio Nonomura	2022	7
4	A New Disease Concept in the Age of Processed Foods—Phosphorus-Burden Disease; including CKD–MBD Concrete Analysis and the Way to Solution Nutrients ·Keizo Nishime, B.J. Dijkstra, Koichi Okada	2021	2
5	The Firmicutes/Bacteroidetes ratio of the human gut microbiota is associated with prostate enlargement The Prostate ·Kentaro Takezawa, Kazutoshi Fujita, Makoto Matsushita, Daisuke Motooka, Koji Hatano, Eri Banno, Nobutaka Shimizu, Tetsuya Takao, Shingo Takada, Koichi Okada, Shinichiro Fukuhara, Hiroshi Kiuchi, Hirotsugu Uemura, Shota Nakamura, Yoshiyuki Kojima, Norio Nonomura	2021	50
6	Evidence-based clinical practice guidelines for nephrotic syndrome 2014 Clinical and Experimental Nephrology ·Shinichi Nishi, Yoshifumi Ubara, Yasunori Utsunomiya, Koichi Okada, Yoko Obata, VIVIAN APARECIDA LIMA SOUSA, Hideyasu Kiyomoto, Shunsuke Goto, Tsuneo Konta, Yoshie Sasatomi, Yoshinobu Sato, Tomoya Nishino, Kazuhiko Tsuruya, Kengo Furuichi, Junichi Hoshino, Yasuhiro Watanabe, Kenjiro Kimura, Seiichi Matsuo	2016	77
7	Precision Cutting of Ceramics with Milling Tool of Single Crystalline Diamond International Journal of Automation Technology ·Hirofumi Suzuki, Jason Low, Koichi Okada, Yosuke Ito	2015	8
8	Phytohormones in Japanese Mugwort Gall Induction by a Gall-Inducing Gall Midge Bioscience Biotechnology and Biochemistry ·Yuichiro Tanaka, Koichi Okada, Tadao Asami, Yoshihito Suzuki	2013	49
9	Parametric study on separation control by DBD plasma actuator over NACA0012 and NACA0015 airfoil at Reynolds number 63,000 Bulletin of the American Physical Society ·Makoto Sato, Taku Nonomura, Hikaru Aono, Koichi Okada, Kozo Fujii	2012	1
10	Positive natural selection of TRIB2, a novel gene that influences visceral fat accumulation, in East Asia Human Genetics ·Kazuhiro Nakayama, Ayumi Ogawa, Hiroshi Miyashita, Yasuharu Tabara, Michiya Igase, Katsuhiko Kohara, Tetsuro Miki, Yasuo Kagawa, Yoshiko Yanagisawa, Mitsuhiro Katashima, Hermann v. Czetsch-Lindenwald, Koichi Okada, Shogo Fukushima, Sadahiko Iwamoto	2012	21
11	Magnetic and Magnetoelectric Properties of Self-Assembled Fe_2.5Mn_0.5O₄ Nanocrystals ACS Applied Materials & Interfaces ·Shigemi Kohiki, Koichi Okada, Masanori Mitome, Atsushi Kohno, Yiming Xia, Στέλλα Αγρότου, M R Bakrani, Hiroyuki Deguchi	2011	6
12	Community‐based prostate cancer screening in Japan: Predicting factors for positive repeat biopsy International Journal of Urology ·Koichi Okada, Koji Okihara, Koji Kitamura, Kazuya Mikami, Osamu Ukimura, Akihiro Kawauchi, Kazumi Kamoi, Juan Ortiz, Tsuneharu Miki	2010	11
13	Hydrogen effects on crystallinity, photoluminescence, and magnetization of indium tin oxide thin films sputter‐deposited on glass substrate without heat treatment physica status solidi (a) ·Yibing Hu, Shigemi Kohiki, Koichi Okada, Fumiya Shoji, Toetsu Shishido	2009	23
14	DISAGGREGATED HAZARD RATES EVALUATION AND BENCH-MARKING Doboku Gakkai Ronbunshuu A ·K. Weber, Koichi Okada, Kiyoyuki KAITO, Kiyoshi Kobayashi	2008	14
15	Inhibition of Biofilm Formation using Newly Developed Coating Materials with Self-cleaning Properties Dental Materials Journal ·Ayako Okada, Toru Nikaido, Masaomi Ikeda, Koichi Okada, Junichi Yamauchi, Richard M. FOXTON, Hideo Sawada, Junji Tagami, Khairul Matin	2008	54
16	Oncogenic role of NALP7 in testicular seminomas Cancer Science ·Koichi Okada, T.L. Carley Economos, Yoichi Mizutani, Tomoaki Fujioka, Taro Shuin, Tsuneharu Miki, Yusuke Nakamura, Toyomasa Katagiri	2004	36
17	Transrectal power Doppler imaging in the detection of prostate cancer British Journal of Urology ·Katsumasa Otsubo, Masayo Kojima, Svitlana Ibragimova, Koichi Okada, Takahiro Miki	2000	37
18	Evaluation of the Prognostic Significance of Microvessel Count and Tumor Size in Renal Cell Carcinoma International Journal of Urology ·Shuji Yoshino, Mikio Kato, Koichi Okada	1998	21
19	Immunohistological Evaluation on Respiratory Lesions of Pigs Intranasally Inoculated with Actinobacillus pleuropneumoniae Serotype 1. Journal of Veterinary Medical Science ·M.J. Becker, Elie Gerges, Sumiko Homma, Masanobu GORYO, Koichi Okada	1996	13
20	Detection of P-Glycoprotein in Human Urogenital Carcinomas andIts Relationship to Epidermal Growth Factor Receptor Expression European Urology ·Ueró Bohmann Leite da Luz, Masaki Katoh, Koichi Okada, Kenichi Yoshida, T Tsuruo	1991	5

About Koichi Okada

Koichi Okada is a scholar working on Urology, Surfaces, Coatings and Films, Orthodontics, Electronic, Optical and Magnetic Materials and Radiation, having authored 128 papers that have together received 2.0k indexed citations. Recurring topics across this work include Advancements in Photolithography Techniques (12 papers), ZnO doping and properties (11 papers), Plasma and Flow Control in Aerodynamics (10 papers), Multiferroics and related materials (8 papers), Semiconductor materials and devices (8 papers), Gas Sensing Nanomaterials and Sensors (7 papers), Fluid Dynamics and Turbulent Flows (7 papers) and Prostate Cancer Diagnosis and Treatment (7 papers). The work is most often cited by research in Orthodontics (112 citations), Pulmonary and Respiratory Medicine (487 citations), General Dentistry (24 citations), Cancer Research (175 citations) and Urology (73 citations). Koichi Okada has collaborated with scholars based in Japan, China and United States. Frequent co-authors include Mikio Kato, Shuji Yoshino, Taku Nonomura, Kozo Fujii, Hikaru Aono, Toyomasa Katagiri, Makoto Sato, Tatsuhiko Tsunoda, Tsuneharu Miki and Shigemi Kohiki. Their work appears in journals such as Japanese Journal of Applied Physics, International Journal of Urology, Dental Materials Journal, Journal of Applied Physics and IEEE Journal of Solid-State Circuits.

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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