Kazuhiko Okada

704 total citations
30 papers, 496 citations indexed

About

Kazuhiko Okada is a scholar working on Immunology, Hepatology and Oncology. According to data from OpenAlex, Kazuhiko Okada has authored 30 papers receiving a total of 496 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Immunology, 9 papers in Hepatology and 8 papers in Oncology. Recurrent topics in Kazuhiko Okada's work include Liver Disease Diagnosis and Treatment (6 papers), Immune Cell Function and Interaction (6 papers) and Immunotherapy and Immune Responses (6 papers). Kazuhiko Okada is often cited by papers focused on Liver Disease Diagnosis and Treatment (6 papers), Immune Cell Function and Interaction (6 papers) and Immunotherapy and Immune Responses (6 papers). Kazuhiko Okada collaborates with scholars based in Japan, United States and Germany. Kazuhiko Okada's co-authors include Yukihiro Shimizu, Kiyohiro Higuchi, Akiharu Watanabe, Shuji Nambu, Yoshiro Kashii, Megumi Miyamoto, S Nagashima, Kazuaki Chikamatsu, T L Whiteside and Masami Minemura and has published in prestigious journals such as Hepatology, Journal of Hepatology and Journal of Gastroenterology and Hepatology.

In The Last Decade

Kazuhiko Okada

27 papers receiving 485 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Kazuhiko Okada Japan	9	251	226	103	92	82	30	496
Yoon Lee South Korea	10	398 1.6×	252 1.1×	126 1.2×	83 0.9×	35 0.4×	13	573
Yuka Igarashi Japan	13	256 1.0×	169 0.7×	161 1.6×	117 1.3×	81 1.0×	30	551
S Nagashima United States	9	255 1.0×	145 0.6×	150 1.5×	27 0.3×	51 0.6×	14	534
Bastian Höchst Germany	11	491 2.0×	295 1.3×	105 1.0×	146 1.6×	49 0.6×	16	715
Jason M. Zimmerer United States	17	418 1.7×	300 1.3×	191 1.9×	42 0.5×	59 0.7×	35	710
Li-Xi Huang China	12	349 1.4×	429 1.9×	195 1.9×	65 0.7×	69 0.8×	13	691
Shi-Ping Chen China	12	377 1.5×	392 1.7×	156 1.5×	55 0.6×	56 0.7×	14	645
Megan Karwan United States	6	272 1.1×	78 0.3×	140 1.4×	68 0.7×	70 0.9×	8	481
Ursula R. Sorg Germany	13	186 0.7×	177 0.8×	254 2.5×	51 0.6×	65 0.8×	26	580
Angela D. Pardee United States	12	254 1.0×	220 1.0×	121 1.2×	90 1.0×	18 0.2×	13	436

Countries citing papers authored by Kazuhiko Okada

Since Specialization

Citations

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

Fields of papers citing papers by Kazuhiko Okada

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kazuhiko Okada

This figure shows the co-authorship network connecting the top 25 collaborators of Kazuhiko Okada. A scholar is included among the top collaborators of Kazuhiko Okada 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 Kazuhiko Okada. Kazuhiko Okada is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Kobashi, Haruhiko, et al.. (2026). Effect of Direct‐Acting Antivirals on Prognosis in Older Patients With Hepatitis C Virus‐Related Hepatocellular Carcinoma After Curative Therapy: A Retrospective Study by the Red Cross Liver Study Group in Japan. Hepatology Research.

Tajiri, Kazuto, Kazuhiko Okada, Hiroyuki Ito, et al.. (2023). Long term changes in thrombocytopenia and leucopenia after HCV eradication with direct-acting antivirals. BMC Gastroenterology. 23(1). 182–182.

Ueda, Akira, Kazuhiko Okada, Terumi Takahara, et al.. (2010). A case of adult-onset type II citrullinemia induced by hospital diet. Clinical Journal of Gastroenterology. 4(1). 28–33.

Murata, Hiroyuki, Yukihiro Shimizu, Kazuhiko Okada, Kiyohiro Higuchi, & Akiharu Watanabe. (2003). Detection and analysis of intracytoplasmic cytokines in peripheral blood mononuclear cells in patients with drug-induced liver injury. Journal of Hepatology. 38(5). 573–582. 6 indexed citations

Murakami, Jun, Yukihiro Shimizu, Yoshiro Kashii, et al.. (1999). Functional B-cell response in intrahepatic lymphoid follicles in chronic hepatitis C. Hepatology. 30(1). 143–150. 105 indexed citations

Kinoshita, Takehito, et al.. (1998). Genetic Analysis of Restriction Fragment Length Polymorphism on the Fatty Acid Synthesis in Soybean Mutants and Their Progenies: I. Low linolenic acid mutants with a microsomal ω-3 fatty acid desaturase cDNA as a probe. Saga University Institutional Repository. 83. 31–36. 6 indexed citations

Yata, Yutaka, Kazuhiko Okada, Shuji Nambu, et al.. (1998). CASE REPORT: Intrahepatic portal‐hepatic venous shunts associated with a huge pelvic leiomyoma. Journal of Gastroenterology and Hepatology. 13(2). 158–162. 6 indexed citations

Miyamoto, Megumi, Yukihiro Shimizu, Kazuhiko Okada, et al.. (1998). Effect of interleukin-8 on production of tumor-associated substances and autocrine growth of human liver and pancreatic cancer cells. Cancer Immunology Immunotherapy. 47(1). 47–57. 101 indexed citations

Koide, Norio, et al.. (1998). Inter-laboratory difference among eleven clinical laboratories in the Okayama City area.. PubMed. 52(5). 261–70. 1 indexed citations

10.

Okada, Kazuhiko, Satoshi Yasumura, Ingrid Müller‐Fleckenstein, et al.. (1997). Interactions between Autologous CD4+and CD8+T Lymphocytes and Human Squamous Cell Carcinoma of the Head and Neck. Cellular Immunology. 177(1). 35–48. 24 indexed citations

11.

Kashii, Yoshiro, et al.. (1997). Analysis of T-cell receptor Vβ repertoire in liver-infiltrating lymphocytes in chronic hepatitis C. Journal of Hepatology. 26(3). 462–470. 11 indexed citations

12.

Ohmori, Takaaki, et al.. (1995). Characteristics of MHC antigen expression and tumor-infiltrating mononuclear cells in renal cell adenomas and carcinomas.. PubMed. 10(4). 789–94. 14 indexed citations

13.

Shimizu, Yukihiro, Masami Minemura, Takashi Tsukishiro, et al.. (1995). Interleukin-8 produced by human hepatocellular carcinoma cell lines has an angiogenic activity.. Kanzo. 36(3). 144–150. 1 indexed citations

14.

Okada, Kazuhiko. (1994). Serum interleukin-8 levels in patients with hepatocellular carcinoma. International Hepatology Communications. 2(3). 178–182. 6 indexed citations

15.

Aramaki, Masanori, et al.. (1994). Induction by OK-432 of lymphokine activated killer precursor cells in hepatocellular carcinoma.. PubMed. 41(4). 363–6. 2 indexed citations

16.

Watanabe, Akiko, Takashi Tsukishiro, Kazuhiko Okada, et al.. (1994). Hepatocellular carcinoma in 13 patients with hepatitis C virus‐associated chronic hepatitis. Journal of Gastroenterology and Hepatology. 9(1). 30–34. 2 indexed citations

17.

Tsukishiro, Takashi, Shuji Nambu, Kazuhiko Okada, et al.. (1994). Analyses of proliferating cell nuclear antigen‐positive cells in hepatocellular carcinoma: Comparisons with clinical findings. Journal of Gastroenterology and Hepatology. 9(5). 425–432. 5 indexed citations

18.

Okada, Kazuhiko, Yukihiro Shimizu, Shuji Nambu, Kiyohiro Higuchi, & Akiharu Watanabe. (1994). Interleukin‐6 functions as an autocrine growth factor in a cholangiocarcinoma cell line. Journal of Gastroenterology and Hepatology. 9(5). 462–467. 74 indexed citations

19.

Higuchi, Kiyohiro, Kazuhiko Okada, Takashi Tsukishiro, et al.. (1992). Induction of allogeneic tumour‐ and lymphokine‐activated lymphocytes against hepatocellular carcinoma. Journal of Gastroenterology and Hepatology. 7(2). 136–141. 3 indexed citations

20.

Tsukamura, M, et al.. (1973). Differentiation between Mycobacterium kansasii and Mycobacterium marinum.. PubMed. 107(1). 145–8. 2 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.

Explore authors with similar magnitude of impact