Masashi Hirooka

8.3k total citations
196 papers, 3.6k citations indexed

About

Masashi Hirooka is a scholar working on Hepatology, Epidemiology and Surgery. According to data from OpenAlex, Masashi Hirooka has authored 196 papers receiving a total of 3.6k indexed citations (citations by other indexed papers that have themselves been cited), including 131 papers in Hepatology, 128 papers in Epidemiology and 49 papers in Surgery. Recurrent topics in Masashi Hirooka's work include Liver Disease Diagnosis and Treatment (121 papers), Hepatocellular Carcinoma Treatment and Prognosis (73 papers) and Liver Disease and Transplantation (57 papers). Masashi Hirooka is often cited by papers focused on Liver Disease Diagnosis and Treatment (121 papers), Hepatocellular Carcinoma Treatment and Prognosis (73 papers) and Liver Disease and Transplantation (57 papers). Masashi Hirooka collaborates with scholars based in Japan, United States and United Kingdom. Masashi Hirooka's co-authors include Yoichi Hiasa, Masanori Abe, Morikazu Onji, Bunzo Matsuura, Yohei Koizumi, Kojiro Michitaka, Atsushi Hiraoka, Teru Kumagi, Yoshio Tokumoto and Hironori Ochi and has published in prestigious journals such as Gastroenterology, PLoS ONE and Hepatology.

In The Last Decade

Masashi Hirooka

183 papers receiving 3.5k citations

Peers

Masashi Hirooka

EPIDE

HEPAT

SURGE

ONCOL

PHYSI

Hideki Fujii Japan

Francesco Tovoli Italy

Daniela Cabibi Italy

Masahiko Koda Japan

Masatoshi Ishigami Japan

Paul Cheung‐Lung Choi Hong Kong

J.I. Herrero Spain

Harry L.A. Janssen Netherlands

Hitoshi Takagi Japan

Ilario de Sio Italy

Hideki Fujii Japan

Masashi Hirooka

2.5k ×1.2

EPIDE

1.5k ×0.7

HEPAT

814 ×1.2

SURGE

385 ×1.0

ONCOL

351 ×1.0

PHYSI

Citations per year, relative to Masashi Hirooka Masashi Hirooka (= 1×) peers Hideki Fujii

Countries citing papers authored by Masashi Hirooka

Since Specialization

Citations

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

Fields of papers citing papers by Masashi Hirooka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masashi Hirooka

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

Imamura, Yoshiki, Teru Kumagi, Masashi Hirooka, et al.. (2025). Pancreatic congestion is associated with exocrine pancreatic function in liver cirrhosis. Hepatology Research. 55(5). 685–695.

Imai, Yusuke, Yohei Koizumi, Yoichi Hiasa, et al.. (2024). Standard technique in Japan for measuring hepatic venous pressure gradient. Journal of Gastroenterology. 60(1). 24–31. 1 indexed citations

Miyake, Teruki, Shinya Furukawa, Bunzo Matsuura, et al.. (2024). Combined effect of histological findings and diabetes mellitus on liver‐related events in patients with metabolic dysfunction‐associated steatotic liver disease. Hepatology Research. 54(11). 1016–1026. 1 indexed citations

Kumada, Takashi, Hidenori Toyoda, Sadanobu Ogawa, et al.. (2024). Diagnostic performance of shear wave measurement in the detection of hepatic fibrosis: A multicenter prospective study. Hepatology Research. 54(9). 851–858. 2 indexed citations

Kumada, Takashi, Sadanobu Ogawa, Hidenori Toyoda, et al.. (2024). Comparison Between Attenuation Measurement and the Controlled Attenuation Parameter for the Assessment of Hepatic Steatosis Based on MRI Images. Liver International. 45(1). e16210–e16210. 4 indexed citations

Hirooka, Masashi, Yohei Koizumi, Yoshiko Nakamura, et al.. (2023). B-mode shear wave elastography can be an alternative method to vibration-controlled transient elastography according to a moderate-scale population study. Journal of Medical Ultrasonics. 50(4). 473–483. 2 indexed citations

Ochi, Hironori, Atsushi Hiraoka, Takaaki Tanaka, et al.. (2023). Clinical role of radiofrequency ablation for early‐stage hepatocellular carcinoma in an advanced aging society. Hepatology Research. 53(7). 641–648. 2 indexed citations

Miyake, Teruki, Bunzo Matsuura, Shinya Furukawa, et al.. (2022). Fatty liver with metabolic disorder, such as metabolic dysfunction‐associated fatty liver disease, indicates high risk for developing diabetes mellitus. Journal of Diabetes Investigation. 13(7). 1245–1252. 12 indexed citations

Hirooka, Masashi, Yohei Koizumi, Yoshiko Nakamura, et al.. (2022). Spleen stiffness in patients with chronic liver disease evaluated by 2‐D shear wave elastography with ultrasound multiparametric imaging. Hepatology Research. 53(2). 93–103. 6 indexed citations

10.

Miyake, Teruki, Shinya Furukawa, Bunzo Matsuura, et al.. (2022). Plasma Fatty Acid Composition Is Associated with Histological Findings of Nonalcoholic Steatohepatitis. Biomedicines. 10(10). 2540–2540. 10 indexed citations

11.

Tanaka, Takaaki, Masashi Hirooka, Yohei Koizumi, et al.. (2021). Development of a method for measuring spleen stiffness by transient elastography using a new device and ultrasound-fusion method. PLoS ONE. 16(2). e0246315–e0246315. 12 indexed citations

12.

Imamura, Yoshiki, Teru Kumagi, Taira Kuroda, et al.. (2021). Pancreas stiffness in liver cirrhosis is an indicator of insulin secretion caused by portal hypertension and pancreatic congestion. Hepatology Research. 51(7). 775–785. 9 indexed citations

13.

Hirooka, Masashi, Takaaki Tanaka, Yohei Koizumi, et al.. (2021). Measurement of multiple spleen lengths is not necessary for non‐invasive prediction of high‐risk esophagogastric varices. Hepatology Research. 52(2). 187–198. 2 indexed citations

14.

Miyake, Teruki, Bunzo Matsuura, Shinya Furukawa, et al.. (2021). Nonalcoholic fatty liver disease is a risk factor for glucose intolerance onset in men regardless of alanine aminotransferase status. Journal of Diabetes Investigation. 12(10). 1890–1898. 3 indexed citations

15.

Hirooka, Masashi, Yohei Koizumi, Takao Watanabe, et al.. (2021). Validation of the FibroScan‐aspartate aminotransferase score by vibration‐controlled transient and B‐mode ultrasound elastography. Hepatology Research. 51(6). 652–661. 7 indexed citations

16.

Koizumi, Yohei, Masashi Hirooka, Takaaki Tanaka, et al.. (2021). Noninvasive ultrasound technique for assessment of liver fibrosis and cardiac function in Fontan-associated liver disease: diagnosis based on elastography and hepatic vein waveform type. Journal of Medical Ultrasonics. 48(2). 235–244. 5 indexed citations

17.

Koizumi, Yohei, Masashi Hirooka, Nobuharu Tamaki, et al.. (2019). New diagnostic technique to evaluate hepatic steatosis using the attenuation coefficient on ultrasound B mode. PLoS ONE. 14(8). e0221548–e0221548. 33 indexed citations

18.

Tamaki, Nobuharu, Yohei Koizumi, Masashi Hirooka, et al.. (2018). Novel quantitative assessment system of liver steatosis using a newly developed attenuation measurement method. Hepatology Research. 48(10). 821–828. 74 indexed citations

19.

Hiraoka, Atsushi, Takashi Kumada, Kunihiko Tsuji, et al.. (2018). Validation of Modified ALBI Grade for More Detailed Assessment of Hepatic Function in Hepatocellular Carcinoma Patients: A Multicenter Analysis. Liver Cancer. 8(2). 121–129. 149 indexed citations

20.

Koizumi, Mitsuhito, Hironao Nakayama, Takao Watanabe, et al.. (2017). Downregulation of ANP32B exerts anti-apoptotic effects in hepatocellular carcinoma. PLoS ONE. 12(5). e0177343–e0177343. 14 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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