Hiroaki Okuda

2.1k total citations
34 papers, 1.6k citations indexed

About

Hiroaki Okuda is a scholar working on Hepatology, Epidemiology and Reproductive Medicine. According to data from OpenAlex, Hiroaki Okuda has authored 34 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Hepatology, 17 papers in Epidemiology and 7 papers in Reproductive Medicine. Recurrent topics in Hiroaki Okuda's work include Hepatocellular Carcinoma Treatment and Prognosis (13 papers), Liver Disease Diagnosis and Treatment (12 papers) and Hepatitis B Virus Studies (8 papers). Hiroaki Okuda is often cited by papers focused on Hepatocellular Carcinoma Treatment and Prognosis (13 papers), Liver Disease Diagnosis and Treatment (12 papers) and Hepatitis B Virus Studies (8 papers). Hiroaki Okuda collaborates with scholars based in Japan, Taiwan and Nepal. Hiroaki Okuda's co-authors include Naoaki Hayashi, Hiroshi Obata, Ken Takasaki, Toshimi Nakanishi, Etsuko Hashimoto, Akiko Saito, Makiko Taniai, Masayuki Nakano, Masakazu Yamamoto and Kazuko Takatsu and has published in prestigious journals such as Hepatology, Cancer and Journal of Hepatology.

In The Last Decade

Hiroaki Okuda

33 papers receiving 1.6k citations

Peers

Hiroaki Okuda

HEPAT

EPIDE

SURGE

Simona Leoni Italy

Paul C.L. Choi Hong Kong

Katharina Staufer Austria

Hwi Young Kim South Korea

Raffaella Vecchione Italy

Myeong Jun Song South Korea

Dawn M. Emick United States

Yoshio Tokumoto Japan

Teiji Kuzuya Japan

Catherine Frenette United States

Simona Leoni Italy

Hiroaki Okuda

1.1k ×1.0

HEPAT

1.2k ×1.3

EPIDE

320 ×1.0

SURGE

131 ×0.6

183 ×0.9

Citations per year, relative to Hiroaki Okuda Hiroaki Okuda (= 1×) peers Simona Leoni

Countries citing papers authored by Hiroaki Okuda

Since Specialization

Citations

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

Fields of papers citing papers by Hiroaki Okuda

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroaki Okuda

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

Okuda, Hiroaki, et al.. (2009). Crystallinity of μc-Si films for solar cell application studied by Raman spectroscopy and X-ray diffraction methods. 38. 103–107.

Okuda, Hiroaki. (2007). Hepatocellular carcinoma development in cirrhosis. Best Practice & Research Clinical Gastroenterology. 21(1). 161–173. 68 indexed citations

Okuda, Hiroaki, Keiko Shiratori, Masakazu Yamamoto, Ken Takasaki, & Masayuki Nakano. (2006). Clinicopathologic features of patients with intrahepatic cholangiocarcinoma who are seropositive for α‐fetoprotein‐L3 and those with combined hepatocellular and cholangiocarcinoma. Journal of Gastroenterology and Hepatology. 21(5). 869–873. 12 indexed citations

Okuda, Hiroaki, Akiko Saito, Keiko Shiratori, et al.. (2005). Clinicopathologic features of patients with primary malignant hepatic tumors seropositive for α‐fetoprotein‐L3 alone in comparison with other patients seropositive for α‐fetoprotein‐L3. Journal of Gastroenterology and Hepatology. 20(5). 759–764. 22 indexed citations

Hashimoto, Etsuko, Makiko Taniai, Hiroyuki Kaneda, et al.. (2004). Comparison of Hepatocellular Carcinoma Patients With Alcoholic Liver Disease and Nonalcoholic Steatohepatitis. Alcoholism Clinical and Experimental Research. 28(Supplement). 164S–168S. 31 indexed citations

Okuda, Hiroaki, Toshimi Nakanishi, Kazuko Takatsu, et al.. (2002). Clinicopathologic features of patients with hepatocellular carcinoma seropositive for α‐fetoprotein‐L3 and seronegative for des‐γ‐carboxy prothrombin in comparison with those seropositive for des‐γ‐carboxy prothrombin alone. Journal of Gastroenterology and Hepatology. 17(7). 772–778. 44 indexed citations

Shimada, Masahiko, Etsuko Hashimoto, Makiko Taniai, et al.. (2002). Hepatocellular carcinoma in patients with non-alcoholic steatohepatitis. Journal of Hepatology. 37(1). 154–160. 277 indexed citations

Okuda, Hiroaki, Kazuko Takatsu, Akiko Saito, et al.. (2001). Comparison of clinicopathological features of patients with hepatocellular carcinoma seropositive for α‐fetoprotein alone and those seropositive for des‐γ‐carboxy prothrombin alone¹. Journal of Gastroenterology and Hepatology. 16(11). 1290–1296. 48 indexed citations

Hasegawa, Kiyoshi, Etsuko Hashimoto, Makiko Taniai, et al.. (2000). TWO SIBLINGS CASES OF CONGENITAL HEPATICFIBROSIS. Acta gastro-enterologica belgica. 42(1). 50–55. 1 indexed citations

10.

Nakanishi, Toshimi, et al.. (1995). Levels of vitamin K, immunoreactive prothrombin, des‐γ‐carboxy prothrombin and γ‐glutamyl carboxylase activity in hepatocellular carcinoma tissue. Journal of Gastroenterology and Hepatology. 10(1). 8–13. 22 indexed citations

11.

Tomimatsu, Masahiko, Noriko Ishiguro, Makiko Taniai, et al.. (1993). Hepatitis C virus antibody in patients with primary liver cancer (hepatocellular carcinoma, cholangiocarcinoma, and combined hepatocellular-cholangiocarcinoma) in Japan. Cancer. 72(3). 683–688. 89 indexed citations

12.

Okumura, Hiroki, Osamu Kawamura, Seishi Kishimoto, et al.. (1993). Aflatoxin M₁ in Nepalese sera, quantified by combination of monoclonal antibody immunoaffinity chromatography and enzyme-linked immunosorbent assay. Carcinogenesis. 14(6). 1233–1235. 12 indexed citations

13.

Kojimahara, Noriko, et al.. (1992). A case report. Middle-aged congenital hepatic fibrosis followed up as idiopathic portal hypertension.. Kanzo. 33(8). 643–648. 1 indexed citations

14.

Nakanishi, Toshimi, et al.. (1992). Changes of plasma des-γ-carboxy prothrombin levels in patients with hepatocellular carcinoma in response to vitamin K. Cancer. 69(1). 31–38. 39 indexed citations

15.

Okuda, Hiroaki, et al.. (1991). Vitamin K‐dependent proteins and hepatocellular carcinoma. Journal of Gastroenterology and Hepatology. 6(4). 392–399. 13 indexed citations

16.

Tomimatsu, Masahiko, Hiroaki Okuda, Akiko Saito, et al.. (1989). A case of biliary cystadenocarcinoma with morphologic and histochemical features of hepatocytes. Cancer. 64(6). 1323–1328. 8 indexed citations

17.

Hashimoto, Etsuko, Toshimi Nakanishi, Takeshi Kurihara, et al.. (1986). Long-term outcome of hepatitis B vaccination and memory of immunization.. Kanzo. 27(10). 1371–1375. 1 indexed citations

18.

Okuda, Hiroaki, Toshimi Nakanishi, Ryuji FURUKAWA, Etsuko Hashimoto, & Hiroshi Obata. (1986). Production of abnormal prothrombin (PIVKA-II) by hepatocellular carcinoma. A clinical and experimental study.. Kanzo. 27(12). 1697–1702. 2 indexed citations

19.

Okuda, Hiroaki, Hiroshi Obata, Akiko Saito, et al.. (1986). Hepatocellular carcinoma not associated with cirrhosis. A clinicopathological study in 41 patients including 29 resected cases. Journal of Gastroenterology and Hepatology. 1(2). 129–137. 1 indexed citations

20.

Obata, Hiroshi, Naoaki Hayashi, Yoji Motoike, et al.. (1980). A prospective study on the development of hepatocellular carcinoma from liver cirrhosis with persistent hepatitis B virus infection. International Journal of Cancer. 25(6). 741–747. 114 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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