TAOKA Yosuke



Faculty of Agriculture Department of Marine Biological and Environmental Science



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Degree 【 display / non-display

  • Doctor (Fishery) ( 2007.3   Kagoshima University )

Research Areas 【 display / non-display

  • Life Science / Applied microbiology

  • Life Science / Aquatic bioproduction science


Papers 【 display / non-display

  • Identification and characterization of pathogenic bacteria isolated from dead masu salmon Oncorhynchus masou masou and antibacterial activity of probiotic Lactococcus lactis subsp. lactis strain K-C2 against isolated pathogens Reviewed

    Yasaka Y., Binh P.T., Hayami Y., Tanaka R., Uchida K., Taoka Y.

    Fisheries Science   89 ( 1 )   41 - 51   2022.12

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Fisheries Science  

    We focused on developing an epidemic prevention method for circulating masu salmon aquaculture using the probiotic Lactococcus lactis strain K-C2. This study aimed to evaluate the antibacterial activities of strain K-C2 against pathogens isolated from dead Yamame and masu salmon. First, we identified pathogenic bacteria that were isolated from dead masu salmon based on phylogenetic analysis of the 16S rRNA gene sequence and biological and biochemical characterization. The antibacterial activity of strain K-C2 against seven pathogenic strains isolated from dead masu salmon in this study and two strains of Aeromonas salmonicida previously isolated from dead Yamame was tested using a double agar plate method. The results of a BLAST search using 16S rRNA partial sequence data (1200–1300 bp) revealed that six of the former strains and one of the latter strains showed high similarity to Vibrio anguillarum and Tenacibaculum maritimum, respectively. Strain K-C2 showed antibacterial activity against all pathogenic bacteria. In this study, pathogenic bacteria were newly isolated from dead seawater-acclimated masu salmon, and strain K-C2 was found to have antibacterial effects against these pathogens.

    DOI: 10.1007/s12562-022-01648-4


  • Effect of the probiotic Lactococcus lactis subsp. lactis strain K-C2 on the release of amino acids from aquafeeds, and on the intestinal microflora of amberhack, Seriola dumerili and common carp, Cyprinus carpio following administration as a feed additive Invited Reviewed International coauthorship

    Yousuke Taoka, Yuki Hayami, Phan Trong Binh, Yurie Yasaka


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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  • Rapid Production of Fish Sauce from the Internal Organs of White Sturgeon, Acipenser transmontanus Richardson, 1836 Reviewed

    Yanohara T., Taoka Y., Yamamoto M.

    Fermentation   8 ( 5 )   2022.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Fermentation  

    The internal organs of white sturgeon in Miyazaki Prefecture are discarded during processing. Therefore, we tried to produce fish sauce using a short-term manufacturing method. The minced internal organs were autolyzed by endogenous proteases at 50 °C. During autolysis, the protein contents of the supernatant and precipitate after centrifugation were analyzed by the Kjeldahl method, and the protein size was monitored by SDS-PAGE. This analysis showed that the extraction rate was about 60% after treatment at 50 °C for 24 h. The major bands at 200 kDa, 43 kDa, and 40 kDa detected before the start of the treatment gradually disappeared over time. Fifteen components were detected as the main volatile components. These components increased sharply and then decreased during incubation at 50 °C for 24 h. The fish sauce produced had a good aroma after incubation at 50 °C for 72 h.

    DOI: 10.3390/fermentation8050238


  • Evaluation of Rate of Adhesion of Lactobacillus namurensis Strain GYP-74 to Porous Fine Ceramics Invited Reviewed

    Yousuke Taoka, Kentaro Sakai, Hiroyuki Kinoshita, Hanaka Fukuyama, Taichi Kobayashi, Atsushi Hirano, Noriaki Kuroki, Akihiko Kimura

    Processes   9 ( 4 )   658   2021.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.3390/pr9040658

  • Evaluation of rate of adhesion of Lactobacillus namurensis strain GYP-74 to porous fine ceramics

    Taoka Y., Sakai K., Kinoshita H., Fukuyama H., Kobayashi T., Hirano A., Kuroki N., Kuroki M., Kimura A.

    Processes   9 ( 4 )   2021.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Processes  

    This study aimed to evaluate the ratio of adherence of lactic acid bacteria (LAB) to porous fine ceramics in order to develop a novel LAB-rich pickle container for the production of functional fermented vegetables. Some LAB were isolated from the salted rice bran used for pickling (Nukadoko in Japanese). These isolates were classified in Lactobacillus namurensis by phylogenetic analysis. Some pottery-shard (PS) samples were prepared by varying the mixing rate of polyacetal (POM) resin to clay (0-30% (v/v)) and the burning temperature (1000 °C or 1100 °C). A test of the adherence of strain GYP-74 to the PSs was performed. The results showed that the adherence rate was significantly higher in the PSs burned at 1100 °C as compared with those burned at 1000 °C. A pore distribution analysis showed that pore sizes of less than a few µm and pore sizes in the range of a few µm to a few hundred µm were mainly distributed in the PSs without and with POM, respectively. X-ray diffraction analysis showed that both PSs with and without POM contained quartz and hematite. The PSs burned at 1000 °C and 1100 °C specifically contained microcline and mullite, respectively. This study revealed the basal information regarding what makes PSs adequate for LAB adhesion.

    DOI: 10.3390/pr9040658


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Books 【 display / non-display

  • 水産増養殖におけるプロバイオティクスの可能性と物質代謝から見た作用機序の解明

    田岡洋介・Nguyen Thi Hue Linh( Role: Joint author)

    北隆館  2020.10 

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    Language:Japanese Book type:Scholarly book

MISC 【 display / non-display

  • 水産増養殖におけるプロバイオティクスの可能性と物質代謝から見た作用機序の解明 Invited International coauthorship

    田岡洋介・Nguyen Thi Hue Linh

    アグリバイオ   2021.5

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  • Effects of cold shock treatment on total lipid content and fatty acid composition of Aurantiochytrium limacinum strain mh0186

    Taoka Y., Nagano N., Okita Y., Izumida H., Sugimoto S., Hayashi M.

    Journal of Oleo Science   60 ( 5 )   217 - 220   2011

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:Journal of Oleo Science  

    To examine the effect of cold shock treatment on the fatty acid composition of Aurantiochytrium limacinum strain mh0186, a marine thraustochytrid, we cultivated this strain at 28°C for 72 h with shaking and stored the obtained biomass at 10°C for 72 h. A growth experiment was carried out for comparison, wherein strain mh0186 was grown at 10 and 15°C for 72 h with shaking, and it was found that the unsaturation of fatty acids was accelerated relative to that at 28°C. In the cold shock experiment, the total lipid content signifi cantly increased during storage at 10°C for 72 h. Overall, the percentage of unsaturated fatty acids such as docosahexaenoic acid was almost stable while that of n-6 docosapentaenoic acid decreased slightly, but signifi cantly, relative to that in the growth experiment. © 2011 by Japan Oil Chemists' Society.

    DOI: 10.5650/jos.60.217


Presentations 【 display / non-display

  • チョウザメ魚醤の速醸化の検討

    矢野原泰士・田岡洋介・梅津和歩・山本瑞貴* 田島良亮・黒田明大・細田蓮也

    日本水産学会春季大会  (オンライン開催(大会本部:東京海洋大学内))  日本水産学会

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    Event date: 2021.3.26 - 2021.3.30

    Language:English   Presentation type:Oral presentation (general)  


  • Complete replacement of fishmeal in aquafeeds for carp, Cyprinus carpio with lipid-extracted residue derived from a thraustochytrid Aurantiochytrium sp. mem0039 Invited International conference

    Noriyuki Tai, Horii Kenya, Yousuke Taoka

    International Conference on Aquaculture and Fisheries in Bangkok  (Bangkok, Thailand) 

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    Event date: 2019.11.11 - 2019.11.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Bangkok, Thailand  

  • プロバイオティクスを用いた魚病予防法の開発


    動物用ワクチン-バイオ医薬品研究会 シンポジウム 

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    Event date: 2019.9.12

    Language:English   Presentation type:Oral presentation (general)  

  • Evaluation of light-emitting diode irradiation on the inhibitory effect against fish pathogens International conference

    Phan Trong Binh, Satoshi Hori, Yousuke Taoka

    Marine Biotechnology Conference 2019 

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    Event date: 2019.9.9 - 2019.9.13

    Language:English   Presentation type:Poster presentation  

  • Enrichment of Lactcoccus lactis strain K-C2 on Artemia and inhibition against Vibrio alginolyticus, V. campbellii and V. harveyi by strain K-C2 International conference

    Yuki Hayami, Nguyen Thi Hue Linh, Yousuke Taoka

    Marine Biotechnology Conference 2019  (Shizuoka, Japan) 

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    Event date: 2019.9.9 - 2019.9.13

    Language:English   Presentation type:Poster presentation  

    Venue:Shizuoka, Japan  

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Awards 【 display / non-display

  • 平成23年度日本水産学会論文賞

    2012.3   公益社団法人日本水産学会  

    田岡洋介、前田広人、Jae-Yoon JO、Min-Jee JEON、Sungchul C. BAI、Won-Jae LEE、弓削寿哉、越塩俊介

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    Award type:International academic award (Japan or overseas)  Country:Japan

  • 平成18年度日本防菌防黴学会論文賞

    2006.5   鹿児島大学  

    塩崎靖志、前田広人、田岡洋介、越塩俊介、吉川毅、坂田泰造、C. Saclauso

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

Other research activities 【 display / non-display

  • 宮崎県西都産養殖鯉を用いた機能性魚醤油の開発

    2021.04 - 2022.03

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  • 平成30年度拡充(ソフト)事業"細島いわがき"成分検査事業

    2018.04 - 2019.03

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  • TECH PLANTER 2018 宮崎大会


  • 宮崎県日向市沿岸の水質調査とブランド化に関わる研究


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  • 宮崎県高鍋町沿岸海水質調査


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Available Technology 【 display / non-display

  • 乳酸菌を用いた機能性成分強化発酵食品の開発


    Home Page: 研究室ホームページ

    Related fields where technical consultation is available:・発酵微生物の単離・同定や最適培養条件の探索