Hiroshi Oka

9.0k total citations · 1 hit paper
368 papers, 7.2k citations indexed

About

Hiroshi Oka is a scholar working on Surgery, Electrical and Electronic Engineering and Molecular Biology. According to data from OpenAlex, Hiroshi Oka has authored 368 papers receiving a total of 7.2k indexed citations (citations by other indexed papers that have themselves been cited), including 66 papers in Surgery, 51 papers in Electrical and Electronic Engineering and 48 papers in Molecular Biology. Recurrent topics in Hiroshi Oka's work include Advancements in Semiconductor Devices and Circuit Design (35 papers), Semiconductor materials and devices (33 papers) and Liver Disease Diagnosis and Treatment (30 papers). Hiroshi Oka is often cited by papers focused on Advancements in Semiconductor Devices and Circuit Design (35 papers), Semiconductor materials and devices (33 papers) and Liver Disease Diagnosis and Treatment (30 papers). Hiroshi Oka collaborates with scholars based in Japan, United States and Austria. Hiroshi Oka's co-authors include Hitoshi Shiozaki, Shigeyuki Tamura, Masatoshi Takeichi, Kenji Kobayashi, Shinji Hirano, Toshitsugu Oda, Kazumasa Miki, Norihisa Matsuyoshi, Keisuke Iihara and Hitoshi Iyatomi and has published in prestigious journals such as Journal of Biological Chemistry, Applied Physics Letters and Gastroenterology.

In The Last Decade

Hiroshi Oka

335 papers receiving 6.9k citations

Hit Papers

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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.

Expression of E-cadherin cell adhesion molecules in human breast cancer tissues and its relationship to metastasis.

1993 566 citations Hiroshi Oka et al. PubMed profile →

Peers

Countries citing papers authored by Hiroshi Oka

Since Specialization

Citations

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

Fields of papers citing papers by Hiroshi Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroshi Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroshi Oka. A scholar is included among the top collaborators of Hiroshi Oka 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 Hiroshi Oka. Hiroshi Oka 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	Hot Carrier Degradation in Si n-MOSFETs at Cryogenic Temperatures 2025 ·IEEE Journal of the Electron Devices Society ·(unknown), Hiroshi Oka, Kimihiko Kato, (unknown), Shota Iizuka, Hidehiro Asai, Takahiro Mori	0
2	Cryogenic threshold voltage and on-current variability comparative analysis of same-fab 65 nm bulk and fully depleted silicon-on-insulator metal–oxide–semiconductor field-effect transistors 2024 ·Japanese Journal of Applied Physics ·(unknown), T. Mizutani, Kiyoshi Takeuchi, Takuya Saraya, Hiroshi Oka, Takahiro Mori, Masaharu Kobayashi, Toshiro Hiramoto	0
3	Device structure and fabrication process for silicon spin qubit realizing process-variation-robust SWAP gate operation 2023 ·Japanese Journal of Applied Physics ·Hidehiro Asai, Shota Iizuka, Tohru Mogami, Junichi Hattori, Koichi Fukuda, Tsutomu Ikegami, Kimihiko Kato, Hiroshi Oka, Takahiro Mori	4
4	Verification of influence of tail states and interface states on sub-threshold swing of Si n-channel MOSFETs over a temperature range of 4–300 K 2021 ·Japanese Journal of Applied Physics ·Min-Soo Kang, Kasidit Toprasertpong, Mitsuru Takenaka, Hiroshi Oka, Takahiro Mori, Shinichi Takagi	14
5	Effect of percolation path on temperature dependence of threshold voltage variability in bulk MOSFETs 2021 ·Japanese Journal of Applied Physics ·T. Mizutani, Kiyoshi Takeuchi, Takuya Saraya, Hiroshi Oka, Takahiro Mori, Masaharu Kobayashi, Toshiro Hiramoto	9
6	A Study of Factors Associated with the Development of Pseudoaldosteronism in Outpatients 2020 ·The Journal of Alternative and Complementary Medicine ·Naoki Mantani, Hiroshi Oka, Takashi Watanabe	1
7	Inactivation of Airborne Bacteria and Viruses Using Extremely Low Concentrations of Chlorine Dioxide Gas 2016 ·Pharmacology ·Norio Ogata, (unknown), (unknown), Takashi Shibata, (unknown), (unknown), (unknown), Kazuki Matsubara, (unknown), Daisuke Kato, (unknown), Hiroshi Oka	23
8	The Long-Term Effects of a Kampo Medicine, Juzentaihoto, on Maintenance of Antibody Titer in Elderly People after Influenza Vaccination 2013 ·Evidence-based Complementary and Alternative Medicine ·Ikuo Saiki, Keiichi Koizumi, Hirozo Goto, (unknown), Takao Namiki, (unknown), Toshiaki Kogure, T. Tatsumi, Hiroki Inoue, Shinya Sakai, Hiroshi Oka, (unknown), Hiroaki HIKIAMI, Hiroaki Sakurai, Naotoshi Shibahara, Yutaka Shimada, Hideki Origasa	15
9	Effect of goreisan on urinary concentrating ability and expression of aquaporin-2 in 5/6 nephrectomized rats 2013 ·(unknown), (unknown), (unknown), Hiroshi Oka, Naotoshi Shibahara	8
10	Cinnamaldehyde and paeonol increase HIF-1α activity in proximal tubular epithelial cells under hypoxia 2011 ·Hiroshi Oka, Hirozo Goto, Keiichi Koizumi, Tatsuya Nogami, (unknown), Shin Nakamura, Yue Zhou, Hiroaki Sakurai, Naotoshi Shibahara, Ikuo Saiki, Yutaka Shimada	1
11	Two Cases of Postherpetic Neuralgia Recurring after Withdrawal of Kampo Medicine Including Uzu 2011 ·Kampo Medicine ·Tatsuya Nogami, Hiroshi Oka, Makoto Fujimoto, Hiroaki HIKIAMI, Hirozo Goto, Naotoshi Shibahara, Yutaka Shimada	4
12	A CASE OF ILEUS CAUSED BY AN INTERNAL HERNIA OF THE BROAD LIGAMENT OF THE UTERUS THAT WAS TREATED LAPAROSCOPICALLY 2008 ·Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association) ·Norihiko Yamamoto, (unknown), (unknown), (unknown), Mamoru Shimada, Hiroshi Oka	1
13	Application of morphology for detection of Dots in tumor 2004 ·Society of Instrument and Control Engineers of Japan ·S Yoshino, Toshiaki Tanaka, Maiko Tanaka, Hiroshi Oka	12
14	The Collaborative Factors to Treat Hepatic Failure by Blood Purification(Symposium 3: Apheresis in the Treatment of Liver Disease) : 1996 ·Yoshihiro Endo, Tohru Tani, Kazuyoshi Hanasawa, (unknown), (unknown), (unknown), Hiroshi Oka, (unknown), Masashi Kodama	1
15	Summarizing Report on Sclerotherapy of 50 Cases with Varicose Vein 1995 ·Skin research ·Moriya Ohkuma, (unknown), Osamu Ishida, Katsuhisa Shindo, (unknown), Harumasa Ohyanagi, Hiroshi Oka, Hidetaka Oku, Hitoshi Shirotani, (unknown)	2
16	PROBLEMS AND SIGNIFICANCE OF 24-HOUR CONTINUOUS MEASUREMENT OF INTRAGASTRIC pH 1993 ·Acta gastro-enterologica belgica ·Yoshihiro Yamamoto, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Masanori Hirano, (unknown), Hiroshi Oka	1
17	Hepatocyte plasma membrane glycosphingolipid reactive with sera from patients with autoimmune chronic active hepatitis: Its identification as sulfatide 1990 ·Hepatology ·Gotaro Toda, Yusei Ikeda, (unknown), Masao Iwamori, Hiroshi Oka	30
18	The studies on the extrahepatic portal hemodynamics in 37 cases with liver cirrhosis. 1990 ·Kanzo ·(unknown), (unknown), Yoshihiro Yamamoto, Eiji Hamada, (unknown), (unknown), Toshiaki Shimizu, (unknown), Masanori Hirano, (unknown), Hiroshi Oka	2
19	Hypomethylation of c-myc and epidermal growth factor receptor genes in human hepatocellular carcinoma and fetal liver. 1985 ·PubMed ·Yoshiyasu Kaneko, Masabumi Shibuya, (unknown), (unknown), Gotaro Toda, Yasuo Endo, Hiroshi Oka, Toshitsugu Oda	41
20	1984 ·Kanzo ·Kiyohiko Kurai, Shiro Iino, Kazuhiko Koike, Hiroshi Suzuki, Keiji Mitamura, Yasuo Endo, Hiroshi Oka	4

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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