• Welcome

    Tomano's website

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    About me

    Satoshi Tomano, PhD

    1990 Born in Setouchi City, Okayama Prefecture

    Doctor of Agriculture


    I was born into a family of oyster farmers and fishermen, and have been familiar with the sea and fish since I was a child. I love the sea and was a member of the sailing club in high school and university. To study the ocean and biology, I enrolled in the Faculty of Bioproduction at Hiroshima University, where I have been conducting research under Associate Professor Tetsuya Unno of the Graduate School of Biosphere Science.


    Since November 2017, I have been studying at the Barber Lab, Department of Ecology and Evolutionary Biology, University of California, Los Angeles, under the JSPS Fellowship Program. I have continued my research on the reproductive biology of squids in the Atmosphere and Ocean Research Institute, the University of Tokyo.


    I am now working for a private company and conducting research on efficient aquaculture using science and technology.


    What can I do to ensure that we continue to enjoy the gifts of the sea in the future? I would like to think about the answer to this question through my research.







  • Research

    Research on the stock structure of the reef squid Sepioteuthis lessoniana



    Japan, one of the world's largest squid consuming countries

    Marine resources contribute to food security and adequate nutrition for a global human population, providing protein to about 3 billion people with at least 15 percent of their average per capita animal protein intake (FAO 2016). Generally, fish populations can be sustainably harvested if the method of harvest does not destroy the reproductive potential of species (Hilborn & Hilborn 2012). However, global finfish stocks have been declined over the past 40 years, possibly due to the overfishing and environmental change such as rising water temperature (Meyer & Worm 2003).

    In such a status, the amount of squid catch increased 4 times over the past 40 years in order to satisfy an increasing global demand for protein (Arkihipkin et al. 2015). In addition, squid abundance has also increased despite to marine environmental changes (Doubleday et al. 2016). Squids have special biological characteristics including rapid growth and short life span, which allow them to adapt to changing environmental conditions more quickly than other marine species.


    Reef squid Sepioteuthis lessoniana

    They are called the king of squid due to its high market value

    My target species Sepioteuthis cf. lessoniana is called as "king of squid" because one of the most widely distributed neritic squids occurred in coastal waters throughout the Indo-West Pacific region including Japan to Australia and New Zealand, and from Hawaii to East Africa, north to the Red Sea and south to Madagascar, where one of the most commercially important species with the highest market value. It's captured with a variety of gears including lure-hook called "Egi"-ing, set net, purse seine (Jereb & Roper 2010, Ueta & Umino 2013). Egi is the traditional squid jig that looks like fish and shrimp.


    About the three species of reef squids in Japan

    Red, White and Small squid

    Previous studies have demonstrated this stock actually comprises three reproductively isolated taxa: Sepioteuthis sp. 1 (Red squid), Sepioteuthis sp. 2 (White squid) and Sepioteuthis sp. 3 (Small squid). Accurate identification of these taxa is necessary for appropriate stock management. These three taxa are morphologically very similar and difficult to differentiate morphologically, but they are distinct at the molecular level. The primary objective of our study is to determine the structure of the oval squid stock around Japan using sensitive DNA markers.

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    Conservation Ecology Research on the Reef squid

    To continue to receive the benefits of this squids

    Information that is essential for resource conservation, such as the distribution of the three species of reef squid, the proportion of the three species in the catch, and differences in spawning ecology, was limited to the Okinawa Islands, and was unknown in Honshu, Kyushu, and Shikoku, where reef squid catches are large.


    Knowledge of the species being fished is the most basic and essential information for establishing effective conservation policies. In actual conservation management, it is necessary to consider the geographic population as a unit with which there is genetic exchange. Therefore, to determine effective conservation units, it is important to examine the genetic heterogeneity (population structure) of populations and to identify the boundaries between populations (Sale et al. 2005).

    For example, is there exchange between Pacific and Japan Sea reef squids? To date, several studies have been published, but there has been no unified view among researchers.


    Compared to other squids, the reef squid is known to lay fewer eggs during its lifetime. The life span is about one year, and the parent squid dies after spawning. By clarifying the spawning ecology of the three species of reef squids, we can apply this information to more effective breeding support, such as measures to increase the number of spawners and the maintenance of spawning grounds.


    It is thought that the spawning season, spawning depth, and spawning location differ among the three species, but the details are still unknown.


    I am conducting research with the following four objectives.


    1. Establishment of a DNA identification method that can accurately distinguish the three species of the reef squid.


    2. To clarify the distribution of the three species along the coast of Japan and the dominant species in each area.


    3. To determine whether or not the breeding populations of the three species interact in different geographic regions


    4. To clarify the differences in spawning ecology among the three species.


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    Artificial spawning reefs to support reproduction of the reef squid

    Reef squid spawning in a "tree" in the sea

    Reef squids lay their eggs on structures in the sea. This property has been exploited to support breeding by artificial spawning reefs. Although squids spawn on seaweed from spring to summer, their spawning grounds are decreasing due to high water temperatures and lack of nutrients. Fishermen are voluntarily providing reproductive support to compensate for the decrease in spawning grounds. Artificial spawning reefs made of wood are called "ika shiba" means squid brushwood .

  • Publications




    1. Noritaka Hirohashi, Noriyosi Sato, Yoko Iwata, Satoshi Tomano, Md Nur E Alam, Lígia Haselmann Apostólico, José Eduardo Amoroso Rodriguez Marian. Context-dependent behavioural plasticity compromises disruptive selection of sperm traits in squid.Plos one, 16: e0256745 (2021)
    2. Riho Murai, Mamiya Shiomi, Masa-aki Yoshida, Satoshi Tomano, Yoko Iwata, Kyoko Sugai, Noritaka Hirohashi. All the spermatangia on a female were implanted by single-pair copulation in giant squid Architeuthis dux. Deep Sea Research Part I: Oceanographic Research Papers,175 (2021)
    3. Yutaro Yamashita​, Gustavo Sanchez​​, Kentaro Kawai, Satoshi Tomano, Hiroki Fujita, Tetsuya Umino. The role of the isolation of the marginal seas during the Pleistocene in the genetic structure of black sea bream Acanthopagrus schlegelii (Bleeker, 1854) in the coastal waters of Japan. Peer J (2021)
    4. Hiroki Fujita, Kentaro Kawai, Ryota Taniguchi, Satoshi Tomano, Gustavo Sanchez, Takashi Kuramochi, Tetsuya Umino. Infestation of the Parasitic Isopod Mothocya parvostis on Juveniles of the Black Sea Bream Acanthopagrus schlegelii as an Optional Intermediate Host in Hiroshima Bay. Zoological Science 37: 544-553 (2020).
    5. Satoshi Tomano, Shota Yasuhara, Motohiro Takagi, Tetsuya Umino. The genetic variability and population structure of the marbled rockfish Sebastiscus marmoratus in western Japan, inferred by microsatellite DNA markers. Fisheries Science 85: 961–970 (2019)
    6. Manabu Asakawa *, Takuya Matsumoto, Kohei Umezaki, Kyoichiro Kaneko, Ximiao Yu, Gloria Gomez-Delan, Satoshi Tomano, Tamao Noguchi, Susumu Ohtsuka. Toxicity and Toxin Composition of the Greater Blue-Ringed Octopus Hapalochlaena lunulata from Ishigaki Island, Okinawa Prefecture, Japan. Toxins, 11: 245 (2019)
    7. Jun-ya SHIBATA, Satoshi TOMANO, Tetsuya UMINO, Takeshi TOMIYAMA, Yoichi SAKAI, Satoshi NAKAI, Tetsuji OKUDA, Wataru NISHIJIMA, Isolation, Characterization and PCR Multiplexing of Microsatellite Loci for Western Sand Lance (Ammodytes japonicus Duncker and Mohr 1939), Japan Agricultural Research Quarterly, 52:307-313 (2018)
    8. Kentro Kawai, Ryuma Okazaki, Satoshi Tomano and Tetsuya Umino DNA identification and seasonal changes of pelagic fish eggs in Hiroshima Bay. Nippon Suisan Gakkai 83: 215-217 (2017)
    9. Satoshi Tomano, Gustavo Sanchez, Kentaro Kawai, Noriyasu Kasaoka, Yukio Ueta, Tetsuya Umino. Contribution of Sepioteuthis sp. 1 and Sepioteuthis sp. 2 to oval squid fishery stocks in western Japan. Fisheries Science 82: 585-596 (2016)
    10. Gustavo Sanchez, Satoshi Tomano, Tetsuya Umino, Toshie Wakabayashi, Mitsuo Sakai. Evaluation of the 5’ end of the 16S rRNA gene as a novel DNA barcode marker for Cephalopoda. Fisheries Science 82: 279-288 (2016).
    11. Gustavo Sanchez, Satoshi Tomano, Carmen Yamashiro, Ricardo Fujita, Toshie Wakabayashi, Mitsuo Sakai, Testuya Umino. Population genetics of the jumbo squid Dosidicus gigas (Cephalopoda: Ommastrephidae) in the northern Humboldt Current System based on mitochondrial and microsatellite DNA markers. Fisheries Research 175: 1-9 (2016)
    12. Satoshi Tomano, Gustavo Sanchez, Kanako Ueno, Yukio Ueta, Kenichi Ohara and Tetsuya Umino. Microsatellite DNA variation of oval squid, Sepioteuthis sp. 2 reveals a single fishery stock on the coastline of mainland Japan. Fisheries Science, 81: 839-847 (2015)
    13. Satoshi Tomano, Yukio Ueta, Noriyasu Kasaoka and Tetsuya Umino (2015) Stock identification and spawning depth of oval squid Sepioteuthis spp. in Tanega-shima Island inferred by DNA markers. Aquaculture Science 63: 39-47
    14. Kamarudin Ahmad-Syazni, Satoshi Tomano, Kanako Ueno, Kenichi Ohara and Tetsuya Umino. Genetic structure of yellowfin black seabream Acanthopagrus latus in western Japan based on microsatellite and mtDNA marker analyses. Aquaculture Science 63: 17-27 (2015)
    15. Satoshi Tomano, Kamarudin Ahmad-Syazni, Yukio Ueta, Kenichi Ohara and Tetsuya Umino. Eleven novel polymorphic microsatellite loci for oval squid Sepioteuthis lessoniana (Shiro-Ika Type). International Journal of Molecular Science 14: 19971-19975 (2013)

    Non peer-reviewed

    1. Kamarudin Ahmad-Syazni, Masaki Yamamoto, Naoki Tahara, Satoshi Tomano, Yuka Ishihi, Masaharu Tokuda and Tetsuya Umino. Trophic status of 24 aquatic species in Hiroshima Bay inferred from stable isotope ratio. Biosphere Science 52:1-7 (2013)




    1. Satoshi Tomano, Seiya Kudo, Yumeng Pang, Chih-Shin Chen, Yoshio Masuda, Tadanori Yamguchi, Tomohiko Kawamura, Yoko Iwata. Mitochondrial DNA analysis reveals phenotypic plasticity in swordtip squid (Uroteuthis edulis): morphologically different but genetically homogeneous populations. "Cephalopod International Advisory Council Conference 2022". Sesimbra, Lisbon, Portogul Apr 2-8, 2022
    2. Satoshi Tomano, Samantha Cheng, Tetsuya Umino and Paul Barber. Population structure in two co-occurring cryptic species of big-fin reef squid in Indo-western Pacific Ocean."Cephalopod International Advisory Council Conference 2018". St. Petersburg, Florida, USA Nov 12-16, 2018
    3. Satoshi Tomano and Tetsuya Umino. Geographical distribution and spawning depth of Sepioteuthis sp. 1 and sp. 2 in southwest Japan. “Cephalopod International Advisory Council Conference 2015”, Hakodate, Japan Nov 6-14, 2015
    4. Satoshi Tomano and Tetsuya Umino.Genetic diversity of the big-fin reef squid Sepioteuthis lessoniana around Japan.“24th Annual Philippine Biodiversity Symposium, University of Eastern Philippines, Philippines, Apr 14-17, 2015
    5. Satoshi Tomano, Yukio Ueta and Umino Tetsuya. Analysis of genetic variability and phylogeny of the oval squid Sepioteuthis lessoniana around Japan. “9th International Symposium Cephalopods ‒ Present and Past”, 70, Zurich, Switzerland, Sep 4-14, 2014


    Awards and honors

    【JSPS Grant-in-Aid for Scientific Research (KAKENHI)

    1. Grant-in-Aid for Young Scientists 2021 Aprー2024 Mar
    2. JSPS Fellow(PD),2019 Aprー2022 Mar
    3. Grant-in-Aid for JAPS Fellow,2019 Aprー2022 Mar
    4. JSPS Fellow for Research Abroad,2017 Novー2019 Apr
    5. JSPS Fellow(DC),2015 Apr-2017 Mar
    6. Grant-in-Aid for JAPS Fellow,2015 Apr-2017 Mar

    Awards and Grants

    1. Jul 2017 The Dimitris N. Chorafas Foundation awards the year 2017 in Life Sciences & Medicine, The Dimitris N. Chorafas Foundation, Switzerland
    2. Apr 2016 President Award, Hiroshima University, Japan
    3. Dec 2016 Hiroshima University Excellent Student Scholarship, Hiroshima University, Japan
    4. Sept 2016 2016 ASIA-PACIFIC 3MT FINALIST, 3-Minutes Thesis Competition Asia-Pacific Semi-Final, the University of Queensland, Australia
    5. Sept 2016 People’ Choice Gold award, 3-Minutes Speech Competition for Future Doctors 2016, Hiroshima, Japan
    6. Sept 2016 Runner Up award, Three Minutes Speech Competition for Future Doctors 2016 , Hiroshima, Japan
    7. Apr 2016 President Award, Hiroshima University, Japan
    8. Nov 2015 Best student poster award, Conference 2015, Cephalopod International Advisory Council, Hokkaido, Japan
    9. Nov 2015 People’ Choice Gold award, 3-Minutes Speech Competition for Future Doctors 2015, Hiroshima, Japan
    10. Apr 2015 Travel Grant for international scientific conference, Hiroshima University, Japan
    11. Sept 2014 Travel Grant for international scientific conference, Hiroshima University, Japan
    12. Mar 2014 Dean’s Award, Graduate School of Biosphere Science, Hiroshima University, Japan
    13. Dec 2013 Hiroshima University Excellent Student Scholarship, Hiroshima University, Japan
    14. Mar 2012 Dean’s Award, Faculty of Applied Biological Science, Hiroshima University, Japan
    15. Feb 2012 Vice-President Award, Hiroshima University, Japan
  • Outreach

    Other Activities

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    Not yet translated.


    1. 2021/5/4 テレビ東京 「レべチな人、見つけた」(コメント出演)
    2. 2017/01/05 BS-TBS 「釣り百景: アオリイカに驚きの鑑定報告!エギングパラダイス南紀に大型を追う」
    3. 2016/07/17 フジテレビ(関東ローカル)「ザ・ノンフィクション: 葉山で一人,女漁師」
    4. 2015/12/09 中国放送RCC 「ニュース6」


    1. 2017/08/12 FM東広島 「フィッシュでJOY」
    2. 2016/06/25 FM東広島 「フィッシュでJOY


    1. 2018/7/19  「研究の道わくわく」Weekly LALALA 753号掲載(ロサンゼルスの情報誌)
    2. 2017/3   「若くして死ぬ運命にある海の霊長類たち」 博士課程後期を知る読本 未来を拓く地方協奏プラットフォームHIRAKU
    3. 2015/12/11 「イカ目線で積極アプローチ」週刊釣りニュース 関西版 
    4. 2015/11/02 「大学院生 研究3分間解説」中国新聞朝刊 

    【Web articles】

    1. 2020/8 UJA GAZETTE 研究留学を考えている方と経験された方へのメッセージ,     一般社団法人 海外日本人研究者ネットワーク
    2. 2018/7 JSPS SF newsletter 日本学術振興会サンフランシスコ連絡センター ニュースレター(英語)
    3. 2017/12/31 広島大学大学院生物圏科学研究科「研究人」


    1. 2019/8/10 「 行動・遺伝学的アプローチによる同所的アオリイカ属の生殖隔離の実態解明 」 日本人研究者交流会2019年度夏,Berkeley
    2. 2019/4/22 「アオリイカの保全生態研究」アオリイカ研究会,鹿児島大学水産学部
    3. 2018/6/28 「JFLA Lecture Series 51 Squids, Our Long-Term Friends Save the World」 Japan Foundation国際交流基金ロサンゼルス
    4. 2017/10/27 「大学院進学とその後のキャリア」 院生主催セミナー 広島大学大学院生物圏科学研究科
    5. 2017/3/15 「日本沿岸におけるアオリイカ属の 資源構造に関する研究」,意見交換会,東京都産業労働局島しょ農林水産総合センター八丈事業所
    6. 2017/3/1 「鹿児島奄美大島におけるアオリイカの資源実体と展望」,アオリイカ生態研究発表会 ,瀬戸内町役場,奄美大島
    7. 2017/2/28 「黒潮域におけるアオリイカ類の資源構造」, アオリイカ生態研究情報交換会, 屋久島漁業協同組合安房本所
    8. 2017/2/27 「黒潮域におけるアオリイカ類の資源構造」 水産資源生息生態調査等報告会 , 種子島漁業協同組合
    9. 2017/2/20 「南九州のアオリイカ資源の現状と増殖について」,西薩地区水産業改良普及事業推進協議会講演会,鹿児島県いちき串木野漁業協同組合
    10. 2016/9/10 「イカの王様アオリイカの保全生態研究」 平成 28 年度 『 関西フェニックスの会 』 例会 広島大学関西フェニックスの会 大阪
    11. 2016/3/16 「鹿児島県におけるアオリイカ集団の解析」 アオリイカ生態研究発表会 屋久島漁協 屋久島
    12. 2016/3/15「鹿児島県におけるアオリイカ集団の解析」 アオリイカ生態研究発表会 種子島漁協 種子島
    13. 2016/2/9 「イカの王様アオリイカの保全生態研究」 学生の!が世界を変える 学生チーム「Collecting Rabb!ts」 広島大学
    14. 2015/3/1 「DNA鑑定に基づく種子島産アオリイカの種判別と産卵水深」 アオリイカ生態研究会 屋久島漁協 屋久島
    15. 2015/2/27 「DNA鑑定に基づく種子島産アオリイカの種判別と産卵水深」 アオリイカ生態研究発表会 種子島漁協 種子島


    • 水産資源保護啓発研究活動推進委員 (平成28年度),公益社団法人日本水産資源保護協会
    • 科学技術予測センター(NISTEP) 専門調査員(平成31年度〜),文部科学省 科学技術・学術政策研究所
    • Southern California Japanese Scholars Forum (SCJSF) 運営スタッフ(平成30年〜)
    • 一般社団法人海外日本人研究者ネットワーク(UJA) 運営スタッフ(令和3年8月〜)





    Speech competition

    【2016 Asia-Pacific 3MT】

    Finalist - Satoshi Tomano “The King of Squid”


    【HIRAKU 3MT Competition 2016】

     「Live fast and die young」