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Job title: Professor
Department: Department of Ocean Sciences
Degree: Doctor
Major: Life Science / Applied microbiology


E-mail address


Researcher ID 産学・地域連携推進機構 研究者総覧データベース Researchmap

Research Interests 【 display / non-display

  • 低温菌・好冷菌

  • 好圧菌

  • 酵素の環境適応

  • 生分解性プラスチック分解酵素

  • 海洋中のプラスチック分解

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Research Areas 【 display / non-display

  • Life Science / Applied microbiology

  • Life Science / Aquatic life science


Papers 【 display / non-display

  • Simple and rapid detection of ESBL blaSHV gene from an urban river in Tokyo by loop-mediated isothermal amplification

    Masahiko Okai, Rintaro Endo, Masachika Takashio, Masami Ishida, Naoto Urano , 2022

    Biocontrol Science

  • Comparison of benzo[a]pyrene-degrading activities between Olleya sp. ITB9 isolated from Tokyo Bay and other type strains of the genus Olleya

    Naoto Urano, Aya Matsushima, Shione Yamamoto, Rintaro Endo, Masami Ishida, Masahiko Okai, Toshinori Takei, Masachika Takashio , 2021.12

    Biocontrol Science

  • Ethanol fermentation by high-stress-tolerance aquatic yeasts and their mutant

    Naoto Urano, Masami Ishida, Yuka Naito, Rintaro Endo, Toshinori Takei, Masachika Takashio, Masahiko Okai , 2021.11

    Advances in Microbiology

  • Draft genome sequences of the lipid-degrading bacteria Moritella sp. strains F1 and F3, isolated from mesopelagic seawater from the Sagami Trough, in Japan

    Kei Kagawa, Rika Kogure, Masahiko Okai, Satoshi Kawano, Hidehiro Kondo, Ikuo Hirono, Masami Ishida , 2021.08

    Microbiology Resouece Announcements

  • Q301P mutant of Vibrio PR protease affects activities under low-temperature and high-pressure conditions

    Masahiko Okai, Chiori Onoue, Ryo Tsuda, Chihiro Ishigami, Chie Yoshida-Mishima, Naoto Urano, Chiaki Kato, Masami Ishida , 2020.10

    Journal of Bioscience and Bioengineering

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Books 【 display / non-display

  • 極限環境微生物の先端科学と社会実装最前線

    石田真巳, 岡井公彦 , 2023.12

    株式会社NTS , 第3編 社会実装研究, 第3章 極限環境酵素の作用機構, 第1節 海洋低温菌由来好圧性プロテアーゼの高圧・低温への環境適応 , P387-394

  • Current research advances in agricultural and biological chemistry

    Masami Ishida Tateo Fujii , 2001.06

    World Wide Research Network , Cold-active extracellular nucleases from cold-adapted bacteria. 緒論(p. 1)、酵素生産菌のスクリーニング(p. 5)、および酵素の性質(p. 6-10) , 1-10

  • Recent research development in agricultural & biological chemistry

    Masami Ishida , 1997.03

    Research Signpost , Enzymes from marine   psychrotolerant bacteria , 259-268


Lesson Subject 【 display / non-display

  • Lesson Subject(Undergraduate)


  • Graduation Thesis

  • Introduction to Biology Ⅱ

  • Lesson Subject(Graduate School)

    Molecular Biochemistry

  • Special Seminar in Aquatic Environmental Chemistry

  • Research in Aquatic Environmental Chemistry

  • Special Seminar in Ocean Sciences

  • Research in Ocean Sciences

  • Advanced Marine Biochemistry