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

Expression of E-cadherin cell adhesion molecules in human... 1993 2026 2004 2015 1993 100 200 300 400 500
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.

  1. 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 — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroshi Oka Japan 42 2.4k 1.6k 1.3k 717 701 368 7.2k
Michael A. Farrell Ireland 38 2.3k 1.0× 1.7k 1.1× 905 0.7× 465 0.6× 1.5k 2.1× 98 7.4k
Tōru Kimura Japan 44 3.0k 1.3× 1.1k 0.7× 1.1k 0.8× 1.2k 1.7× 879 1.3× 326 7.7k
Yongyong Shi China 46 5.2k 2.2× 824 0.5× 2.0k 1.6× 854 1.2× 987 1.4× 362 11.3k
Kiyoshi Maeda Japan 52 2.8k 1.1× 2.1k 1.3× 3.4k 2.6× 491 0.7× 1.7k 2.5× 481 9.8k
Keiichi Takahashi Japan 41 1.2k 0.5× 1.4k 0.9× 2.1k 1.6× 293 0.4× 1.1k 1.6× 251 5.5k
Kenichi Saito Japan 41 1.6k 0.7× 766 0.5× 913 0.7× 526 0.7× 700 1.0× 236 6.2k
Johannes Haybaeck Austria 46 2.9k 1.2× 603 0.4× 1.1k 0.8× 1.2k 1.6× 735 1.0× 256 6.9k
Masahiro Morita Japan 43 3.7k 1.5× 710 0.5× 780 0.6× 640 0.9× 258 0.4× 214 7.4k
Mark A. Goldberg United States 42 4.3k 1.8× 728 0.5× 927 0.7× 415 0.6× 873 1.2× 97 9.1k
Manabu Minami Japan 47 2.6k 1.1× 1.2k 0.8× 918 0.7× 911 1.3× 690 1.0× 189 9.2k

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

20 of 20 papers shown
1.
Oka, Hiroshi, et al.. (2025). Hot Carrier Degradation in Si n-MOSFETs at Cryogenic Temperatures. IEEE Journal of the Electron Devices Society. 13. 308–316.
2.
3.
Asai, Hidehiro, Shota Iizuka, Tohru Mogami, et al.. (2023). Device structure and fabrication process for silicon spin qubit realizing process-variation-robust SWAP gate operation. Japanese Journal of Applied Physics. 62(SC). SC1088–SC1088. 4 indexed citations
4.
Kang, Min-Soo, Kasidit Toprasertpong, Mitsuru Takenaka, et al.. (2021). 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. Japanese Journal of Applied Physics. 61(SC). SC1032–SC1032. 14 indexed citations
5.
Mizutani, T., Kiyoshi Takeuchi, Takuya Saraya, et al.. (2021). Effect of percolation path on temperature dependence of threshold voltage variability in bulk MOSFETs. Japanese Journal of Applied Physics. 61(SC). SC1006–SC1006. 9 indexed citations
6.
Mantani, Naoki, Hiroshi Oka, & Takashi Watanabe. (2020). A Study of Factors Associated with the Development of Pseudoaldosteronism in Outpatients. The Journal of Alternative and Complementary Medicine. 26(4). 329–334. 1 indexed citations
7.
Ogata, Norio, et al.. (2016). Inactivation of Airborne Bacteria and Viruses Using Extremely Low Concentrations of Chlorine Dioxide Gas. Pharmacology. 97(5-6). 301–306. 23 indexed citations
8.
Saiki, Ikuo, Keiichi Koizumi, Hirozo Goto, et al.. (2013). The Long-Term Effects of a Kampo Medicine, Juzentaihoto, on Maintenance of Antibody Titer in Elderly People after Influenza Vaccination. Evidence-based Complementary and Alternative Medicine. 2013. 1–8. 15 indexed citations
9.
10.
Oka, Hiroshi, Hirozo Goto, Keiichi Koizumi, et al.. (2011). Cinnamaldehyde and paeonol increase HIF-1α activity in proximal tubular epithelial cells under hypoxia. 28(3). 149–157. 1 indexed citations
11.
Nogami, Tatsuya, Hiroshi Oka, Makoto Fujimoto, et al.. (2011). Two Cases of Postherpetic Neuralgia Recurring after Withdrawal of Kampo Medicine Including Uzu. Kampo Medicine. 62(3). 369–373. 4 indexed citations
12.
Yamamoto, Norihiko, et al.. (2008). A CASE OF ILEUS CAUSED BY AN INTERNAL HERNIA OF THE BROAD LIGAMENT OF THE UTERUS THAT WAS TREATED LAPAROSCOPICALLY. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 69(4). 928–931. 1 indexed citations
13.
Yoshino, S, Toshiaki Tanaka, Maiko Tanaka, & Hiroshi Oka. (2004). Application of morphology for detection of Dots in tumor. Society of Instrument and Control Engineers of Japan. 1. 591–594. 12 indexed citations
14.
Endo, Yoshihiro, et al.. (1996). The Collaborative Factors to Treat Hepatic Failure by Blood Purification(Symposium 3: Apheresis in the Treatment of Liver Disease) :. 15(1). 33–35. 1 indexed citations
15.
Ohkuma, Moriya, Osamu Ishida, Katsuhisa Shindo, et al.. (1995). Summarizing Report on Sclerotherapy of 50 Cases with Varicose Vein. Skin research. 37(5). 651–657. 2 indexed citations
16.
Yamamoto, Yoshihiro, et al.. (1993). PROBLEMS AND SIGNIFICANCE OF 24-HOUR CONTINUOUS MEASUREMENT OF INTRAGASTRIC pH. Acta gastro-enterologica belgica. 35(10). 1 indexed citations
17.
18.
Yamamoto, Yoshihiro, et al.. (1990). The studies on the extrahepatic portal hemodynamics in 37 cases with liver cirrhosis.. Kanzo. 31(2). 190–197. 2 indexed citations
19.
Kaneko, Yoshiyasu, Masabumi Shibuya, Gotaro Toda, et al.. (1985). Hypomethylation of c-myc and epidermal growth factor receptor genes in human hepatocellular carcinoma and fetal liver.. PubMed. 76(12). 1136–40. 41 indexed citations
20.
Kurai, Kiyohiko, Shiro Iino, Kazuhiko Koike, et al.. (1984). . Kanzo. 25(4). 483–490. 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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