Isao Koida

2.7k total citations
46 papers, 2.2k citations indexed

About

Isao Koida is a scholar working on Hepatology, Epidemiology and Rheumatology. According to data from OpenAlex, Isao Koida has authored 46 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Hepatology, 32 papers in Epidemiology and 7 papers in Rheumatology. Recurrent topics in Isao Koida's work include Hepatitis C virus research (32 papers), Liver Disease Diagnosis and Treatment (25 papers) and Hepatitis B Virus Studies (22 papers). Isao Koida is often cited by papers focused on Hepatitis C virus research (32 papers), Liver Disease Diagnosis and Treatment (25 papers) and Hepatitis B Virus Studies (22 papers). Isao Koida collaborates with scholars based in Japan and Malaysia. Isao Koida's co-authors include Kazuaki Chayama, Satoshi Saitoh, Akihito Tsubota, Hiromitsu Kumada, Masahiro Kobayashi, Yasuji Arase, Naoya Murashima, Kenji Ikeda, Yoshiyuki Suzuki and Yoshiyuki Suzuki and has published in prestigious journals such as Hepatology, Cancer and Radiology.

In The Last Decade

Isao Koida

45 papers receiving 2.1k citations

Peers

Isao Koida

HEPAT

EPIDE

PHARM

RHEUM

Naoya Murashima Japan

M.P. Manns Germany

A. Scott Mills United States

Masaaki Korenaga Japan

Gamal Shiha Egypt

Mauro Borzio Italy

Shingo Nakamoto Japan

Anuchit Chutaputti Thailand

R. Poupon France

Yukio Gibo Japan

Naoya Murashima Japan

Isao Koida

1.5k ×0.9

HEPAT

1.3k ×0.8

EPIDE

248 ×1.0

PHARM

188 ×0.8

108 ×0.5

RHEUM

Citations per year, relative to Isao Koida Isao Koida (= 1×) peers Naoya Murashima

Countries citing papers authored by Isao Koida

Since Specialization

Citations

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

Fields of papers citing papers by Isao Koida

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Isao Koida

This figure shows the co-authorship network connecting the top 25 collaborators of Isao Koida. A scholar is included among the top collaborators of Isao Koida 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 Isao Koida. Isao Koida 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

Kobayashi, Masahiro, Kazuaki Chayama, Yasuji Arase, et al.. (1999). Prevalence of TT virus before and after blood transfusion in patients with chronic liver disease treated surgically for hepatocellular carcinoma. Journal of Gastroenterology and Hepatology. 14(4). 358–363. 21 indexed citations

Ikeda, Kenji, Satoshi Saitoh, Yoshiyuki Suzuki, et al.. (1998). Disease progression and hepatocellular carcinogenesis in patients with chronic viral hepatitis: a prospective observation of 2215 patients. Journal of Hepatology. 28(6). 930–938. 373 indexed citations

Chayama, Kazuaki, Yoshiyuki Suzuki, Masahiro Kobayashi, et al.. (1998). Emergence and takeover of YMDD motif mutant hepatitis B virus during long-term lamivudine therapy and re-takeover by wild type after cessation of therapy. Hepatology. 27(6). 1711–1716. 317 indexed citations

Kobayashi, Mariko, Hiromitsu Kumada, Yasuji Arase, et al.. (1998). Usefulness of hepatitis C virus RNA counts by second generation HCV bDNA-probe in chronic hepatitis C based on the HCV genotype. Journal of Gastroenterology. 33(2). 223–228. 1 indexed citations

Ikeda, Kenji, Satoshi Saitoh, Masahiro Kobayashi, et al.. (1998). Interferon decreases hepatocellular carcinogenesis in patients with cirrhosis caused by the hepatitis B virus. Cancer. 82(5). 827–835. 149 indexed citations

Suzuki, Yoshiyuki, Kenji Ikeda, Satoshi Saitoh, et al.. (1997). Long-term observation of four patients with early stage of primary biliary cirrhosis(PBC).. Kanzo. 38(2). 96–100.

Tsubota, Akihito, Hiromitsu Kumada, Kazuaki Chayama, et al.. (1997). Time course of histological changes in patients with a sustained biochemical and virological response to interferon-α therapy for chronic hepatitis C virus infection. Journal of Hepatology. 27(1). 49–55. 35 indexed citations

Chayama, Kazuaki, Akihito Tsubota, Masaaki Kobayashi, et al.. (1997). Pretreatment Virus Load and Multiple Amino Acid Substitutions in the Interferon Sensitivity-Determining Region Predict the Outcome of Interferon Treatment in Patients With Chronic Genotype 1B Hepatitis C Virus Infection. Hepatology. 25(3). 745–749. 170 indexed citations

Ikeda, Kenji, Satoshi Saitoh, Yoshiyuki Suzuki, et al.. (1997). A Prospective Randomized Administration of 5′-Deoxy-5-fluorouridine as Adjuvant Chemotherapy for Hepatocellular Carcinoma Treated with Transcatheter Arterial Chemoembolization. American Journal of Clinical Oncology. 20(2). 202–208. 14 indexed citations

10.

Ikeda, Kenji, Satoshi Saitoh, Yoshiyuki Suzuki, et al.. (1997). Effect of arterial administration of a high molecular weight anti-tumor agent, styrene maleic acid neocarzinostatin, for multiple small liver cancer—A pilot study. Journal of Gastroenterology. 32(4). 513–520. 8 indexed citations

11.

Suzuki, Yoshiyuki, Kenji Ikeda, Satoshi Saitoh, et al.. (1996). A prospective randamized admininstration of Stronger-Neo-Minophagen C as an adjuvant therapy for chronic hepatitis type C treated with interferon.. Kanzo. 37(7). 363–367. 5 indexed citations

12.

Arase, Yasuji, Kazuaki Chayama, Naoya Murashima, et al.. (1996). A long-term prognosis after interferon therapy for chronic hepatiti C.. Kanzo. 37(3). 145–151. 3 indexed citations

13.

Tsubota, Akihito, Hiromitsu Kumada, Kazuaki Chayama, et al.. (1996). Relationship between pretreatment viremia level and response to interferon-α therapy in chronic hepatitis c differs in viral type 1 and 2 infections. Digestive Diseases and Sciences. 41(10). 1925–1932. 11 indexed citations

14.

Saitoh, Satoshi, Kenji Ikeda, Isao Koida, et al.. (1995). Diagnosis of hepatocellular carcinoma by concanavalin a affinity electrophoresis of serum alpha-fetoprotein. Cancer. 76(7). 1139–1144. 11 indexed citations

15.

Chayama, Kazuaki, Mariko Kobayashi, Akihito Tsubota, et al.. (1995). Molecular analysis of intraspousal transmission of hepatitis C virus. Journal of Hepatology. 22(4). 431–439. 66 indexed citations

16.

Kobayashi, Mariko, Hiromitsu Kumada, Kenji Ikeda, et al.. (1994). Examination in case of agreement and disagreement of HCV-genotype and HCV-serological group in chronic hepatitis C.. Kanzo. 35(10). 709–715. 3 indexed citations

17.

Saitoh, Satoshi, Kazuo Ikeda, Isao Koida, et al.. (1994). Small hepatocellular carcinoma: evaluation of portal blood flow with CT during arterial portography performed with balloon occlusion of the hepatic artery.. Radiology. 193(1). 67–70. 20 indexed citations

18.

Chayama, Kazuaki, Yasuji Arase, Isao Koida, et al.. (1994). Antiviral effect of lymphoblastoid interferon‐alpha on hepatitis C virus in patients with chronic hepatitis type C. Journal of Gastroenterology and Hepatology. 9(2). 128–133. 15 indexed citations

19.

Saitô, Satoshi, Kenji Ikeda, Isao Koida, et al.. (1993). Early diagnosis of small hepatocellular carcinoma with PIVKA-II determined by Abidin-Biotin complex method.. Kanzo. 34(8). 591–596. 1 indexed citations

20.

Chayama, Kazuaki, Akihito Tsubota, Satoshi Saito, et al.. (1992). Genotypical classification of hepatitis C virus genome with polymerase chain reaction using a mixed primer set.. Kanzo. 33(10). 805–806. 5 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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