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Medicine
Japan
2025

D-Index & Metrics

Medicine

D-Index
161
Citations
99971
World Ranking
749
National Ranking
12

Research.com Recognitions

  • 2025 - Research.com Medicine in Japan Leader Award
  • 2023 - Research.com Medicine in Japan Leader Award

Overview

Masao Omata is affiliated with the University of Tokyo in Japan and has contributed extensively to the fields of medicine and biochemistry, genetics, and molecular biology. Their research output includes 335 publications in medicine and 85 in biochemistry-related disciplines.

Omata's work spans various subfields including infectious diseases, epidemiology, oncology, pulmonary and respiratory medicine, and hepatology. The focus of their scientific investigations involves topics such as SARS-CoV-2 and COVID-19 research, cancer genomics and diagnostics, liver disease diagnosis and treatment, SARS-CoV-2 detection and testing, pancreatic and hepatic oncology research, hepatocellular carcinoma treatment and prognosis, and lung cancer treatments and mutations.

Frequent scholarly collaborators include:

  • Yosuke Hirotsu
  • Hitoshi Mochizuki
  • Kenji Amemiya
  • Toshio Oyama
  • Yoshihiro Miyashita

Omata's research has been published most often in the following venues:

  • Hepatology International
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Scientific Reports
  • Journal of Clinical Oncology
  • Cancer Medicine

Some of their notable recent papers include:

  • The Asian Pacific Association for the Study of the Liver clinical practice guidelines for the diagnosis and management of metabolic associated fatty liver disease, 2020, Hepatology International
  • Pre-existing liver disease is associated with poor outcome in patients with SARS CoV2 infection; The APCOLIS Study (APASL COVID-19 Liver Injury Spectrum Study), 2020, Hepatology International
  • Comparison of automated SARS-CoV-2 antigen test for COVID-19 infection with quantitative RT-PCR using 313 nasopharyngeal swabs, including from seven serially followed patients, 2020, International Journal of Infectious Diseases
  • Surgery versus Radiofrequency Ablation for Small Hepatocellular Carcinoma: A Randomized Controlled Trial (SURF Trial), 2021, Liver Cancer
  • APASL clinical practice guideline on hepatitis B reactivation related to the use of immunosuppressive therapy, 2021, Hepatology International

Best Publications

  • Asian-Pacific clinical practice guidelines on the management of hepatitis B: a 2015 update.

    S. K. Sarin;M. Kumar;G. K. Lau;Z. Abbas

  • Correction: Corrigendum: MicroRNA122 is a key regulator of α-fetoprotein expression and influences the aggressiveness of hepatocellular carcinoma

    Kentaro Kojima;Akemi Takata;Charles Vadnais;Motoyuki Otsuka

  • Asia–Pacific clinical practice guidelines on the management of hepatocellular carcinoma: a 2017 update

    Masao Omata;Ann Lii Cheng;Norihiro Kokudo;Masatoshi Kudo

  • Interferon Therapy Reduces the Risk for Hepatocellular Carcinoma: National Surveillance Program of Cirrhotic and Noncirrhotic Patients with Chronic Hepatitis C in Japan

    Haruhiko Yoshida;Yasushi Shiratori;Mitsuhiko Moriyama;Yasuyuki Arakawa

  • Asian-Pacific consensus statement on the management of chronic hepatitis B: a 2012 update.

    Yun Fan Liaw;Jia Horng Kao;Teerha Piratvisuth;Henry Lik Yuen Chan

  • Asian Pacific Association for the Study of the Liver consensus recommendations on hepatocellular carcinoma.

    Masao Omata;Laurentius A. Lesmana;Ryosuke Tateishi;Pei Jer Chen

  • Histologic Improvement of Fibrosis in Patients with Hepatitis C Who Have Sustained Response to Interferon Therapy

    Yasushi Shiratori;Fumio Imazeki;Mitsuhiko Moriyama;Michitami Yano

  • Prospective Cohort Study of Transarterial Chemoembolization for Unresectable Hepatocellular Carcinoma in 8510 Patients

    Kenichi Takayasu;Shigeki Arii;Iwao Ikai;Masao Omata

  • A Randomized Controlled Trial of Radiofrequency Ablation With Ethanol Injection for Small Hepatocellular Carcinoma

    Shuichiro Shiina;Takuma Teratani;Shuntaro Obi;Shinpei Sato

  • Percutaneous radiofrequency ablation for hepatocellular carcinoma. An analysis of 1000 cases.

    Ryosuke Tateishi;Shuichiro Shiina;Takuma Teratani;Shuntaro Obi

  • Standard steroid treatment for autoimmune pancreatitis

    Terumi Kamisawa;Tooru Shimosegawa;Kazuichi Okazaki;Takayoshi Nishino

  • Sunitinib Versus Sorafenib in Advanced Hepatocellular Cancer: Results of a Randomized Phase III Trial

    Ann Lii Cheng;Yoon Koo Kang;Deng Yn Lin;Joong Won Park

  • Radiofrequency Ablation for Hepatocellular Carcinoma: 10-Year Outcome and Prognostic Factors

    Shuichiro Shiina;Ryosuke Tateishi;Toru Arano;Koji Uchino

  • Mutations in the Precore Region of Hepatitis B Virus DNA in Patients with Fulminant and Severe Hepatitis

    Masao Omata;Toshiki Ehata;Osamu Yokosuka;Kazuhiko Hosoda

  • Incidence of hepatocellular carcinoma in chronic Hepatitis B and C: A prospective study of 251 patients

    Susumu Takano;Osamu Yokosuka;Fumio Imazeki;Masami Tagawa

  • Reevaluation of prognostic factors for survival after liver resection in patients with hepatocellular carcinoma in a Japanese nationwide survey.

    Iwao Ikai;Shigeki Arii;Masamichi Kojiro;Takafumi Ichida

  • Asian-Pacific consensus statement on the management of chronic hepatitis B: a 2005 update.

    Yun-Fan Liaw;Nancy Leung;Richard Guan;George K.K. Lau

  • The Asian pacific association for the study of the liver clinical practice guidelines for the diagnosis and management of metabolic associated fatty liver disease

    Mohammed Eslam;Shiv K. Sarin;Vincent Wai Sun Wong;Jian Gao Fan

  • Detection of ras Gene Mutations in Pancreatic Juice and Peripheral Blood of Patients with Pancreatic Adenocarcinoma

    Minoru Tada;Masao Omata;Shigenobu Kawai;Hiromitsu Saisho

  • MicroRNA122 is a key regulator of α-fetoprotein expression and influences the aggressiveness of hepatocellular carcinoma

    Kentaro Kojima;Akemi Takata;Charles Vadnais;Motoyuki Otsuka

Frequent Co-Authors

Takao Kawabe
Takao Kawabe University of Tokyo
Haruhiko Yoshida
Haruhiko Yoshida University of Tokyo
Yasushi Shiratori
Yasushi Shiratori Okayama University
Kazuhiko Koike
Kazuhiko Koike University of Tokyo
Osamu Yokosuka
Osamu Yokosuka Chiba University
Mitsuhiro Fujishiro
Mitsuhiro Fujishiro University of Tokyo
Tsuneo Ikenoue
Tsuneo Ikenoue University of Tokyo
Yasunobu Hirata
Yasunobu Hirata University of Tokyo
Fumio Imazeki
Fumio Imazeki Chiba University
Motoyuki Otsuka
Motoyuki Otsuka University of Tokyo

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