KEIO RESEARCHERS INFORMATION SYSTEM

Message from the Faculty Member 【 Display / hide 】

Message from the Faculty Member 【 Display / hide 】

• 菌類，特にきのこ類の自然史を主な研究対象としています。きのこは，日々の食卓に彩りを添え，健康増進にも一役買っているなど，私たちの生活に身近な生物です。しかし，地球上には，私たちの想像をはるかに超える数の未知のきのこたちが潜んでおり，その多様性の全貌は明らかではありません。そこで私は，日本や中国東北部など，東アジアを中心とした地域の海浜，里山や亜高山帯・高山帯を主なフィールドとして，野外調査によりきのこ類の標本を収集し，形態的・生態的な特徴および遺伝子の情報をもとに，それらの系統分類や生物地理に関する研究を行っています。きのこやカビなどの菌類の視点から，自然環境の複雑さと，地球上の生物の多様性，そして生物と環境とのつながりを探っていきたいと考えています。ところで，人間社会においても，複雑性・多様性を認め，さまざまな分野とのつながりを保つことはとても大切です。学生の皆さんには，慶應義塾において論理的な思考力や表現力を養い，自らの目指す方向を見つけることを期待するとともに，専門性を磨きつつも幅広い視野を持ち，異なる分野へも積極的にアプローチすることを望みます。

Other Affiliation 【 Display / hide 】

Other Affiliation 【 Display / hide 】

• Keio University, 教養研究センター, 所員

• Keio University, Research and Education Center for Natural Sciences, Deputy Director

Career 【 Display / hide 】

Career 【 Display / hide 】

• 2010.04

  -

  2012.03

  University of Tsukuba, Graduate School of Life and Environmental Sciences, JSPS Research Fellowship for Young Scientists (DC2)

• 2012.04

  -

  2013.03

  Komatsu City Office, Komatsu City Museum, 学芸員

• 2012.08

  -

  2015.03

  Kanazawa University, 医薬保健研究域 保健学系 , 研究協力員

• 2013.04

  -

  2019.03

  Chiba Institute of Science, Faculty of Risk and Crisis Management, Assistant Professor

• 2019.04

  -

  Present

  Keio University, Faculty of Economics, Associate Professor

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Academic Background 【 Display / hide 】

Academic Background 【 Display / hide 】

• 2003.04

  -

  2007.03

  University of Tsukuba, 第二学群, College of Biological Resources

  University, Graduated

• 2007.04

  -

  2009.03

  University of Tsukuba, Graduate School of Life and Environmental Sciences, 博士前期課程　生物資源科学専攻

  University, Completed, Master's course

• 2009.04

  -

  2012.03

  University of Tsukuba, Graduate School of Life and Environmental Sciences, 博士後期課程　生物圏資源科学専攻

  University, Completed, Doctoral course

Academic Degrees 【 Display / hide 】

Academic Degrees 【 Display / hide 】

• Doctor of Agriculture, University of Tsukuba, Coursework, 2012.03

Licenses and Qualifications 【 Display / hide 】

Licenses and Qualifications 【 Display / hide 】

• 学芸員資格, 2012.03

Research Areas 【 Display / hide 】

Research Areas 【 Display / hide 】

• Humanities & Social Sciences / Cultural assets study

• Humanities & Social Sciences / Museology

• Environmental Science/Agriculture Science / Plant protection science

• Environmental Science/Agriculture Science / Conservation of biological resources

• Life Science / Biodiversity and systematics

Books 【 Display / hide 】

Books 【 Display / hide 】

• 環境学入門―法学・経済学・自然科学から学ぶ

  青木 淳一, 一ノ瀬 大輔, 小林 宏充, 小島 恵, 山本 雅資, 秋山 豊子, 土居 志織, 林 健太郎, 山崎 友莉子, 林 良信, 糟谷 大河, 坂上 紳, 宮本 佳明, 清家 裕, 慶應義塾大学出版会, 2024.06

  Scope: 第2章第4節 生物多様性の保全と持続的利用を目指して【自然科学②】,  Contact page： 108-120

• Blue data book Ibaraki 2023

  茨城県県民生活環境部環境政策課, 茨城県生物多様性センター, 茨城県県民生活環境部環境政策課 茨城県生物多様性センター, 2023.03,  Page： 173

  Scope: ８ 蘚苔類・藻類・地衣類・菌類,  Contact page： 163-166

• 環境省レッドリスト 日本の絶滅危惧生物図鑑

  Kunio Iwatsuki, Hidetoshi Ota, Taiga Kasuya, Maruzen Publishing, 2022.10

  Scope: アカダマスッポンタケ，コナガエノアカカゴタケ，ヤチヒロヒダタケ

• One hundred selection of Japanese fungi

  日本菌学会編著, 八坂書房, 2020.08,  Page： 111

  Scope: ツチグリ, オニフスベ, ホコリタケ, ウスキキヌガサタケ,  Contact page： 21, 25, 60, 75

• RED DATA BOOK 2020 IBARAKI Bryophytes, Algae, Lichens, Fungi

  糟谷 大河, 茨城県県民生活環境部自然環境課, 2020.03,  Page： 147p

  Scope: Fungi,  Contact page： 110-140

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Papers 【 Display / hide 】

Papers 【 Display / hide 】

• Two species of Rickenella, R. indica and R. mellea, new to Japan

  Taiga Kasuya, Takashi Maruyama, Mihoko Uzawa, Kentaro Hosaka

  Japanese Journal of Mycology 66   35 - 46 2025.05

  Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted

  　View Summary

  The present study reports the identification of two newly recorded species of the genus Rickenella, R. indica and R. mellea, in Japan. Small (1-3 mm wide), parabolic to convex, and never becoming applanate or infundibuliform pileus are characteristic features of R. indica. Rickenella mellea is a subalpine species and it is characterized by its honey-colored, yellowish-beige to reddish yellow-pileus and stipe. Molecular phylogenetic analysis using the ITS region and the LSU of the nuclear rDNA supported their identification based on morphological observations. A key to the known Japanese species of Rickenella and morphologically similar taxa is provided.

  • Access to Document (DOI)

• A new record of Amanita sinocitrina from Japan and a description of its ectomycorrhizae associated with Japanese red pine

  Naoki Endo, Mitsuyo Nishimura, Taiga Kasuya, Ryo Sugawara, Kosuke Nagamune, Shuji Ushijima, Yoshihiro Takemura, Dai Nagamatsu, Akira Nakagiri

  Mycoscience 66 ( 2 ) 145 - 154 2025.03

  Research paper (scientific journal), Joint Work, Accepted

• Exobasidium setsutaiense sp. nov. (Exobasidiaceae) causing leaf blister on Rhododendron semibarbatum in Japan

  Hideyuki Nagao, Takamichi Orihara, Taiga Kasuya

  Phytotaxa (Magnolia Press)  684   78 - 92 2025.02

  Research paper (scientific journal), Joint Work, Last author, Accepted

• Novel tetrapeptides, Tengupeptins A and B, produced by Lecanicillium aphanocladii FKI-9593 fungal strain

  Hiroki Kojima, Yoshihiro Watanabe, Mayuka Higo, Taiga Kasuya, Kenichi Nonaka, Masato Iwatsuki, Akihiro Sugawara

  Chemistry & Biodiversity 2024 ( 0 ) e202403050 2024.12

  Research paper (scientific journal), Joint Work, Accepted

  　View Summary

  The discovery of novel natural products through the exploration of distinctmicroorganisms is crucial for advancing drug discovery research. In this study, we focus on a unique environmental resource, microbial masses known as “Tengu-no-Mugimeshi.” From the culture broth of Lecanicillium aphanocladii FKI-9593, isolated from Tengu-no-Mugimeshi collected at Mount Kurohime, Nagano Prefecture, Japan, we report the isolation of two novel tetrapeptides, tengupeptins A (1) and B (2), as well as the known compound oosporein. Structural analysis revealed that tengupeptins are composed of four amino acids: L-glutamic acid for 1 (or L-pyroglutamic acid for 2), (Z)-α,β-didehydro tryptophan (ΔZTrp), (Z)-α,β-didehydro-phenylalanine (ΔZPhe), and L-aspartic acid. Notably, dehydroamino acids containing an aromatic moiety conjugated with a double bond connected via two or more consecutive linkages are rare in natural products, and the ΔZTrp-ΔZPhe fragment represents the first example. The isolation of secondary metabolites from filamentous fungi inhabiting unique environments, such as Tengu-no-Mugimeshi, is anticipated to offer significant potential for future research.

• Isolation of Exobasidium vexans from the lesions of blister blight of tea and the prevalence of anamorphic structures in culture

  Hideyuki Nagao, Takamichi Orihara, Taiga Kasuya

  Tea Research Journal 138   23 - 31 2024.12

  Research paper (scientific journal), Joint Work, Last author, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide 】

Papers, etc., Registered in KOARA 【 Display / hide 】

• The host-pathogen association of Exobasidium in Japan inferred from molecular phylogeny of ITS and large subunit rDNA sequences

  Kasuya, Taiga

  The Hiyoshi review of natural science (慶應義塾大学日吉紀要刊行委員会)   ( 70 ) 1 - 21 2023.09

  ISSN  09117237

• Tracing the geographical origin of Ophiocordyceps sinensis by using phylogeographic insights and stable isotope analyses

  Kasuya, Taiga

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2021

• Tracing the geographical origin of Ophiocordyceps sinensis by using phylogeographic insights and stable isotope analyses

  Kasuya, Taiga

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2020

• Dynamics of fungal biodiversity in Japanese wetlands between the last glacial and postglacial periods

  Kasuya, Taiga

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2019

Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• Phylogeography of Asarum takaoi var. hisauchii, with a disjunctive distribution in Choshi, Chiba Prefecture

  Taiga Kasuya, Kyoichi Miyahara, Takeshi Kohama, Yuki Ueno, Naoya Iwamoto

  Geoparks and Regional Resources 6 ( 2 ) 125 - 127 2025.03

  Research paper, summary (national, other academic conference), Joint Work, Lead author

• The host-pathogen association of Exobasidium in Japan inferred from molecular phylogeny of ITS and large subunit rDNA sequences

  Hideyuki Nagao, Taiga Kasuya

  Hiyoshi Review of Natural Science, Keio University 70   1 - 21 2023.09

  Article, review, commentary, editorial, etc. (bulletin of university, research institution)

• First record of Gastrosporium gossypinum (Phallales) in Fukuoka Prefecture, Northern Kyushu, Japan

  Taiga Kasuya, Yukiko Kaho, Hayato Ikenouchi, Kentaro Hosaka

  Truffology 4 ( 1 ) 17 - 20 2021.03

  Rapid communication, short report, research note, etc. (scientific journal), Joint Work

• Study on the conservation of Chimaphila umbellata (Ericaceae) in the southernmost limit of the grobal distribution ―Ibaraki Diversity Research Group―

  Ito A, Shoji A, Kasuya T, Yamashita Y, Yukawa T

  Annual Report of Pro Natura Foundation Japan (Pro Natura Foundation Japan)  29   199 - 211 2020.09

  Internal/External technical report, pre-print, etc., Joint Work,  ISSN  2432-0943

  　View Summary

  Chimaphila umbellata</i> is a partially mycoheterotrophic plant, so the involvement of fungi is necessary at the time of germination. This species distributes in the northern hemisphere. In Japan they are found in Hokkaido, Aomori, Iwate, and Ibaraki prefectures. In Hitachinaka city, Ibaraki prefecture, the southern limit of the distribution, the number of individuals has dropped sharply making them in danger of extinction.</p><p>In order to clarify their germination conditions in the southern limit, seed packets were buried in various environments in autumn 2018. After 6 and 10 months, recovered packets were examined and germination was confirmed. The state of the germination was in an early stage where the embryo expands and breaks the testa. It is necessary to continue the investigation in order to identify the environmental conditions suitable for symbiotic fungi and germination.</p><p>Next, in order to compare the breeding status of populations in the southern and the northern (Hokkaido and Aomori prefecture) regions, we surveyed growing area in July to August 2019. As a result, it was not possible to confirm the breeding by the seedlings in all surveyed areas, but the growth density, the number of flowers and fruits were larger in the growing area in the northern part, and hence the possibility of seed breeding would be higher in these regions. In the southern limit, as major pollinator of <i>Chimaphylla umbellata</i> was lacked, artificial pollination is considered to be effective for better fruiting. Finally, population genetics analysis using next-generation sequencing revealed that populations in the southern limit are genetically uniform and that they have less genetic diversity than those in the north. It is necessary to take conservation measures as soon as possible in these areas.

  • Access to Document (DOI)

• The 10th International Symposium on Arctic and Alpine Mycology

  Tamotsu Hoshino, Nobuko Tuno, Yousuke Degawa, Taiga Kasuya, Yuka Yajima, Ei Kawahara, Ikuo Nose

  Mycoscience (Mycoscience)  59 ( 4 ) v - vi 2018.07

  Other, Joint Work,  ISSN  13403540

  • Access to Document (DOI)

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Presentations 【 Display / hide 】

Presentations 【 Display / hide 】

• Towards the conservation of Asarum takaoi var. hisauchii, an endangered plant in Choshi, Chiba Prefecture: compatibility with basic biological researches and conservation management of threatened taxa

  Taiga Kasuya, Takeshi Kohama, Kyoichi Miyahara, Naoya Iwamoto

  9th Annual Meeting of the Society of Integrated Management for Risk and Crisis, 

  2025.05

  , 

  Oral presentation (general)

• Three undescribed species and one new Japanese record of the genus Cryptomarasmius collected in Kanto District

  Eisaburo Ito, Shohei Wada, Kentaro Hosaka, Taiga Kasuya

  69th Annual Meeting of the Mycological Society of Japan, 

  2025.05

  , 

  Oral presentation (general)

• Two undescribed species of Russula fruiting in the spring, found from evergreen broad-leaved forests of Honshu

  Taiga Kasuya, Takashi Maruyama, Masahito Taniguchi, Masayuki Onodera, Kentaro Hosaka

  69th Annual Meeting of the Mycological Society of Japan, 

  2025.05

  , 

  Oral presentation (general)

• The origin and history of the food culture of Armillaria spp. in Hadano, Kanagawa, Japan

  Miyu Ii, Kentaro Hosaka, Taiga Kasuya

  69th Annual Meeting of the Mycological Society of Japan, 

  2025.05

  , 

  Oral presentation (general)

• Russula crassotunicata and Entoloma rhodocylix new to Japan, found in subalpine to alpine zones of mountainous region of Western part of Niigata Prefecture to Southern part of Ishikawa Prefecture

  Takashi Maruyama,Taiga Kasuya, Ei Kawahara

  69th Annual Meeting of the Mycological Society of Japan, 

  2025.05

  , 

  Oral presentation (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

Research Projects of Competitive Funds, etc. 【 Display / hide 】

• Exploring the origins of ponds formed on linear depressions in the Southern AIps region and succession history of those mycobiota and diatom flora

  2024.05

  -

  2025.03

  Shizuoka Prefecture, 令和6年度南アルプス学会研究助成 , Taiga Kasuya, Takeyuki Ueki, Kenichi Nonaka, Research grant, Principal investigator

• 最終氷期から現在に至る，日本の湿原の菌類多様性変遷史

  2023.04

  -

  2026.03

  Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), No Setting

• High resolution and multidisciplinary researches on process of vegetation changes by abrupt warming in the last glacial termination

  2022.04

  -

  2025.03

  Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), No Setting

  　View Summary

  最終氷期終末期（約15,000～10,000年前）に起きたは急激な気温上昇により，最終氷期に広がった針葉樹林は落葉広葉樹林に変化した．本研究では中部・東北日本を対象に，大型植物化石分析の導入と，同じ山域の複数標高間の比較によって，従来よりも高精度な植生の時間・空間分布復元を行い，最新の分布予測モデリング手法と組み合わせることで，急激な気温上昇下で植生がどのように変化して現在に至ったかを解明する．さらに，木炭分析，菌類化石，考古資料による古環境データや，分布予測モデリングなどの現生データとの総合化により，植生変化をもたらした詳しい気候要因と，森林火災や人為，土壌の変化などの間接的影響を解明する．

• Morphological, molecular and ecological researches of fossil fungi for foundation of mycoarchaeology

  2020.07

  -

  2023.03

  Chiba University, Challenging Research (Exploratory), No Setting

  　View Summary

  菌類は有機物の分解や植物の根の養分吸収を補助する役割を担う一方，植物病の蔓延により生態系や人間の生活に大きな影響を及ぼすが，その研究方法は確立していない．本研究は，堆積物に含まれる菌類遺体や，植物遺体の組織に保存されている植物病の痕跡を検出し，形態と古DNAによる同定法，菌類を用いた高精度編年法を確立させることで，過去の気候変動と菌類の消長との関係や，菌類が過去の農作物に及ぼした影響を明らかにすることを目的とする．

• Illuminating the distribution of multiple mushroom species by numerous eyes.

  2020.04

  -

  2024.03

  National Museum of Nature and Science, Tokyo, Grant-in-Aid for Scientific Research (C), No Setting

  　View Summary

  植物や動物は標本データからある程度の分布域を推測することができるが、きのこ類は標本情報と実際の分布域に大きな乖離がある。これはきのこ類の主体が菌糸や胞子であり、肉眼で確認できる子実体発生の有無だけでは、存在が見逃されてきただけ、という可能性を排除できないからである。本プロジェクトでは、1) 市民参加型調査による情報収集、2) 環境DNAによる対象種の検出、3) 種内の遺伝的多様性解析、などを通じ、きのこ類の国内分布域の北限および南限のパターンを推定する。特に最近の分布北上が強く示唆され、顕著な形態的特徴をもつきのこ類複数種を対象とすることで、前例のない精密な分布図を描くことを可能にする。

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Awards 【 Display / hide 】

Awards 【 Display / hide 】

• 特選塾員

  Taiga Kasuya, 2024.05, 慶應義塾

  Type of Award： Keio commendation etc.

• 日本植生史学会第35回大会優秀発表賞

  Kikuchi T, Momohara A, Abe Y, Kasuya T, 2020.11, Japanese Association of Historical Botany, 前期更新世クロサイワイタケ科（Xylariaceae）菌類化石の形態分類と古環境指標としての有用性

  Type of Award： Award from Japanese society, conference, symposium, etc.

• Incentive Award of MSJ

  Taiga Kasuya, 2018.05, Mycological Society of Japan

  Type of Award： Award from Japanese society, conference, symposium, etc.

• 筑波大学 学長表彰

  Taiga Kasuya, 2012.03, University of Tsukuba

  Type of Award： Other

• 大学院第一種奨学金における特に優れた業績による返還免除（全額免除）

  Taiga Kasuya, 2009.05, 独立行政法人日本学生支援機構

  Type of Award： Other

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Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• INDEPENDENT RESEARCH PROJECT B

  2025

• INDEPENDENT RESEARCH PROJECT A

  2025

• GENERAL EDUCATION SEMINAR B

  2025

• GENERAL EDUCATION SEMINAR A

  2025

• BIOLOGY 2

  2025

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Academic Activities 【 Display / hide 】

Academic Activities 【 Display / hide 】

• 銚子ジオパーク推進協議会 保全部会委員

  銚子ジオパーク推進協議会, 

  2024.07

  -

  Present

• 茨城における外来種対策検討委員会委員

  茨城県環境政策課, 

  2020.08

  -

  2023.03

• 銚子ジオパーク推進協議会 保全部会委員

  銚子ジオパーク推進協議会, 

  2018.06

  -

  2019.03

• 茨城県レッドリスト(非維管束植物・菌類・藻類)検討委員会委員

  Ibaraki Prefectural Government, 

  2018.02

  -

  2020.03

• 村花スカシユリ増殖事業実行委員会アドバイザー

  茨城県那珂郡東海村教育委員会生涯学習課, 

  2017

  -

  Present

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Memberships in Academic Societies 【 Display / hide 】

Memberships in Academic Societies 【 Display / hide 】

• Japanese Association of Historical Botany, 

  2020.10

  -

  Present

• 日本第四紀学会, 

  2018.04

  -

  Present

• 日本ワンヘルスサイエンス学会, 

  2017

  -

  Present

• 総合危機管理学会, 

  2016.04

  -

  Present

• 日本植物分類学会, 

  2011.04

  -

  Present

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Committee Experiences 【 Display / hide 】

Committee Experiences 【 Display / hide 】

• 2025.04

  -

  Present

  日本菌学会 理事（会計担当）, Mycological Society of Japan

• 2023.06

  -

  Present

  常務委員, 総合危機管理学会

• 2019.05

  -

  2023.04

  日本菌学会 理事（国内集会担当）, Mycological Society of Japan

• 2019.04

  -

  Present

  評議員, 日本ワンヘルスサイエンス学会

• 2017.04

  -

  Present

  日本菌学会 代議員, 一般社団法人日本菌学会

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