准教授 片平 浩孝 (Hirotaka Katahira)

プロフィール

2002年　札幌市立旭丘高等学校 卒業
2008年　北海道大学水産学部 生物生産学科 卒業
2010年　広島大学大学院 生物圏科学研究科 博士前期課程 修了
2013年　広島大学大学院 生物圏科学研究科 博士後期課程 修了（農学、学振DC1）

北海道大学地球環境科学研究院（学振PD）、帯広畜産大学原虫病研究センター（特任研究員）、NPO北の海の動物センター（常勤職員）、三重大学生物資源学研究科（産学官連携研究員）等を経て本学へ

2002　Graduated from Sapporo Asahigaoka High School
2008　B.Sc., Department of Marine Bioresources and Environmental Science, Faculty of Fisheries Sciences, Hokkaido University
2010　M.Sc., Graduate School of Biosphere Science, Hiroshima University
2013　Ph.D. in Agriculture, Graduate School of Biosphere Science, Hiroshima University (JSPS Research Fellow DC1)

Previous positions include: Faculty of Environmental Earth Science, Hokkaido University (JSPS Postdoctoral Fellow); the National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine (Project Researcher); NPO Northern Marine Wildlife Center (full-time staff); and the Graduate School of Bioresources, Mie University (Industry-Academia-Government Collaboration Researcher).

明治後期から昭和初期にかけて、寄生虫*は我が国における動物学の一角を担う存在でした。しかし時は流れ、一度記載されたきりですっかり忘れ去られてしまった種や、どこでどのように暮らしているのかまったく未知の種が数多く取り残されています。こうしたマイナーな寄生虫に再び焦点をあて、分類学的検討を進めることはもちろん、誰も知ることのなかった寄生関係の営みをフィールドベースで解き明かしていきます。(*かつては寄生蟲という漢字があてられ、有象無象の小動物をさす「蟲」の意味で使われていました)

寄生虫を理解するためには、それらが利用する宿主についても勉強しなくてはなりません。場合によっては、宿主そのものを対象に研究することもあります。生態学や進化生物学、水産資源管理あるいは野生動物管理の専門家とともに共同研究を展開し、生態系全体の理解へとつなげるスタンスを常に意識しています。

以上に加え、着任後の挑戦として、国内の寄生虫学からのれん分けする形で派生した「衛生動物学」にも取り組んでいます。なぜ衛生動物学に注力する必要があるのでしょうか？その理由は、多くの人にとって身近な問題であることに加え、所属研究室が伝統的にこの分野に貢献し、就職先として多くの卒業生を排出してきたからです。この流れを引き継ぐために、企業の方々にご協力を頂きながら、ゴキブリ類や家ネズミ類に加え、貯穀害虫のシバンムシ類などを対象に室内実験を進めてきました。これらの生物は広く知られているし、みなが見ているはずなのに、意外に基礎生態が明らかにされていません。地方や大都会問わず広く被害をもたらすこれら害虫・害獣を対象に、企業の方々ともコラボしながら国際的な研究を展開しています。皆さんも一緒に挑戦しませんか？

学科、研究室志望者へのメッセージ：水産学や水圏生物に興味のあるかたはぜひ一緒に研究しましょう。やる気や希望に合わせてテーマを拡げていきます。衛生動物学を軸として陸域の野生動物にも対象を広げていますので、いろいろと気軽にご相談ください。伝統あるペストコントロール・オペレーター(PCO)の仕事に興味のある学生の参加も歓迎いたします。

From the 1890s through the 1930s, the study of parasites played an important role in the early development of zoology in Japan. As time passed, however, many species were left behind; some described only once and then almost completely forgotten, others still virtually unknown in terms of where and how they live. We aim to bring such overlooked parasites back into focus, not only by revisiting their taxonomy but also by uncovering, through field-based research, host-parasite relationships and ecological interactions that have remained largely unexplored.
*Historically, the Japanese term for parasites was written as 寄生蟲 (kiseichū), using the old character 蟲, which broadly referred to a diverse assortment of small animals and invertebrates.

To understand parasites, we also need to understand the hosts they depend on. In some cases, this means studying the hosts themselves as research subjects. We therefore actively collaborate with specialists in ecology, evolutionary biology, fisheries resource management, and wildlife management, always with the broader goal of linking host-parasite research to a more comprehensive understanding of ecosystems.

In addition to these research themes, since joining Azabu University I have also taken on a new challenge in medical and sanitary zoology, a field that historically developed in Japan from parasitology. Why should we devote effort to this field? One reason is that the organisms involved cause problems that are familiar and relevant to many people. Another is that our laboratory has a long tradition of contributing to this area and has trained many graduates who have gone on to work professionally in pest management and related industries.

To carry this tradition forward, we have been conducting laboratory studies in collaboration with industry partners, focusing on organisms such as cockroaches, commensal rodents, and stored-product pests including anobiid beetles. Although these animals are widely known, and many people encounter them regularly, their basic ecology is surprisingly poorly understood. Because such pests cause problems in both rural areas and major cities, we are developing internationally oriented research in collaboration with pest-control companies and other professionals. Would you like to take on these challenges with us?

Message to prospective students: If you are interested in fisheries science or aquatic organisms, we would be very happy to work with you. Research topics can be expanded and developed according to your interests, motivation, and goals. We are also broadening our work to terrestrial wildlife, with medical and sanitary zoology as one of our core perspectives, so please feel free to discuss a wide range of possible research topics with us. Students interested in the long-established profession of pest control operators (PCOs) are also very welcome to join our laboratory.

着任後の研究成果(2019~)/Research Achievements in My Current Position

［I］査読付専門誌/Articles in Peer-Reviewed Journals

1. Mosu N, K Nakamura, S Yatagai, N Suzuki, C Kase, N Aihara, H Katahira, M Kobayashi, K Kazama, Y Futamura, J Uchiyama, S Kamisuki "Isolation and characterization of rare actinomycetes from diverse animal samples" Bioscience, Biotechnology, and Biochemistry (Accepted)
2. Katahira H, Tsutsui S, Kishino S, Tsujino T, Yajima H, Sawada Y, Eguchi Y, Horiguchi T, Hirasawa R, Hayasaka D, Nitta K "Multiple genetic lineages of the invasive brown widow spider Latrodectus geometricus from inland areas in the Kanto region, Japan" Journal of Medical Entomology 63, tjag077 (2026)
3. Eguchi Y, K Tsumori, T Tsujino, H Yajima, Y Funakoshi, T Shimamoto, K Nitta, H Katahira "Organisms associated with nests of the invasive squirrel Callosciurus erythraeus: An overlooked arboreal habitat for urban pests" BioInvasions Records 15, 325-338 (2026)
   
4. Katahira H, Y Takahata, Y Eguchi, Y Ohari, T Shimamoto, K Uchida "The effect of urbanization on dislodged abundance of two flea species in arboreal squirrels" Urban Ecosystems 29, 151 (2026)
5. Banzai A, H Sugiyama, K Wada, H Katahira, R Hirasawa, R Tanabe, S Saito, K Kobayashi "A human case of cercarial dermatitis and molecular characterization of Trichobilharzia cercariae from Radix plicatula of paddy field in Tokyo, Japan" Parasites, Hosts and Diseases 64, 18-26 (2026)
6. Tsukamoto A, T Su Zan, M Nitta, H Yoshida, H Katahira, Y Fujita, S Takagi, S Nakamura "Educational efficacy of training videos and simulators for teaching basic mouse experimental skills to novice veterinary students" Experimental Animals 75, 90-98 (2026)
7. Katahira H, T Horiguchi, M Takahashi "The occurrences of three ectoparasites on the flathead Platycephalus sp. 2, the "Magochi" from Tokyo Bay, Japan" Plankton and Benthos Research 20, s185-s189 (2025)
8. 江口勇也・佐久間幹大・舩越優実・東典子・嶌本樹・片平浩孝 "神奈川県に定着した特定外来生物クリハラリスCallosciurus erythraeusの地理的由来：台湾を原産とする3系統の混在" 保全生態学研究 29, 117-130 (2024) [Geographic origin of an invasive squirrel Callosciurus erythraeus in Kanagawa Prefecture, Japan: Three phylogenetic groups introduced from Taiwan]
9. Kuroda Y, A Hotta, M Taira, N Koizumi, K Tatemoto, E-s Park, M Virhuez-Mendoza, T Yamamoto, N Komatsu, K Shibo, T Sasaki, Y Mori, K Watanabe, Y Kiyokawa, Y Eguchi, A Banzai, H Katahira, T Tanikawa, K Maeda "Surveillance of SARS-CoV-2 infection in rodent populations in Tokyo, Japan" Japanese Journal of Infectious Diseases 77, 342-344 (2024)
10. 嶌本樹・古荘寿奈・江口勇也・伊藤元裕・片平浩孝 "神奈川県におけるクリハラリスCallosciurus erythraeusの体毛発現の季節性" 哺乳類科学 64, 73-78 (2024) [New hair emergence phenology in the Pallas's squirrel Callosciurus erythraeus inhabiting Kanagawa prefecture]
11. Katahira H, Y Sawada, K Onuma, S Tsuno, H Yajima, Y Eguchi, T Tsujino "Microhabitat use and artificial-light related occurrence of the brown widow spider Latrodectus geometricus in a newly invaded area of the inland Kanto region, Japan" Medical Entomology and Zoology 74, 151-156 (2023)
12. Katahira H, H Iguchi, T Tsujino, N Komatsu, Y Kawakami "Preventive gap size for the first-instar nymph of the smokybrown cockroach" Medical Entomology and Zoology 74, 147-150 (2023)
13. Katahira H, O Ikeda, T Yodo "An outbreak of Neoergasilus japonicus (Copepoda: Ergasilidae) on the Japanese rice fish Oryzias latipes reared in an outdoor tank" Fish Pathology 58, 171-174 (2023)
14. 吉田英利佳・崎山智樹・片平浩孝 "大雪山国立公園内のエゾナキウサギ生息地における散乱ごみ" 野生生物と社会 11, 43-48 (2023) [Littering situation in Japanese pika habitats of Daisetsuzan National Park in Hokkaido, Japan]
15. 江口勇也・佐久間幹大・坂西梓里・遠藤優・鈴木良実・千々岩哲・嶌本樹・片平浩孝 "浜松市に定着したCallosciurus属リス類の遺伝的集団構造：ミトコンドリアDNA D-loop領域に基づく追跡調査とフィンレイソンリス由来ハプロタイプの優占" 哺乳類科学 63, 53-62 (2023) [Population genetic structure of non-indigenous Callosciurus squirrels established in Hamamatsu City, Japan: Dominant haplotypes from Finlayson's squirrels, revealed by a follow-up survey based on the mitochondrial D-loop region]
16. Yamada T, H Katahira, K Miura, F Nakamura "Relationship between salmon egg subsidy and the distribution of an avian predator" Ecology and Evolution 12, e9696 (2022)
17. Katahira H, Y Eguchi, S Hirose, Y Ohtani, A Banzai, Y Ohkubo, T Shimamoto "Spillover and spillback risks of ectoparasites by an invasive squirrel Callosciurus erythraeus in Kanto region of Japan" International Journal for Parasitology: Parasites and Wildlife 19, 1-8 (2022)
18. Hasegawa R, H Katahira, I Koizumi "Salmincola markewitschi (Copepoda: Lernaeopodidae) or S. carpionis? A requirement for taxonomic revision due to their high morphological variations" Folia Parasitologica 69, 025 (2022)
19. Okuno S, H Katahira, K Orito "Somatosensory evoked potentials of the tibial nerve during the surgical decompression of thoracolumbar intervertebral disk herniation in dogs" Frontiers in Veterinary Science 9, 976972 (2022)
20. Katahira H, G Kimura, K Higashi, A Banzai, M Shiroyama, Y Kawakami "Effective use of a growth-inhibiting sheet containing pyriproxyfen for cigarette beetle Lasioderma serricorne larvae: an implication from sheet shape and flour-food accumulation" Medical Entomology and Zoology 73, 53-58 (2022)
21. Horimoto T, H Katahira (co-first author) "Microhabitat use of Pseudocharopinus markewitschi (Gusev, 1951) (Copepoda: Lernaeopodidae) on the mottled skate, Beringraja pulchra (Liu, 1932): does biased occurrence on the dorsal side of the pelvic fin imply a safety zone?" Parasitology International 88, 102561 (2022)
22. Hasegawa R, CG Ayer, Y Umatani, K Miura, M Ukumura, H Katahira, I Koizumi "Potential negative effects and heterogeneous distribution of a parasitic copepod Salmincola edwardsii (Copepods: Lernaeopodidae) on Dolly Varden charr Salvelinus malma krascheninnikova in Hokkaido, Japan" Parasitology International 87, 102529 (2022)
23. Katahira H, AT Matsuda, S Maeda, E Yoshida, A Banzai, TF Matsuishi "Diphyllobothrium stemmacephalum (Cestoda: Diphyllobothriidae) found from a harbor porpoise in northern Japan, with comments on a geographical gap with human infection cases in southern Japan" Parasitology International 87, 102487 (2022)
24. 江口勇也・嶌本樹・田村典子・坂西梓里・片平浩孝 "関東地方に定着したクリハラリスにおける外来糞線虫Strongyloides callosciureusの寄生状況" 哺乳類科学 62, 31-37 (2022) [Infection status of an exotic parasite, Strongyloides callosciureus, in Pallas's squirrel invading in suburban areas of the Kanto region, Japan]
25. 山本敦也・片平浩孝・増渕隆仁・田中智一郎・渡邊典浩・金岩稔 "PITタグを用いた三重県宮川から支流大内山川への天然遡上アユの河川内移動評価" 応用生態工学 21, 235-244 (2021) [Upstream migration of amphidromous ayu from Miya River to a tributary, Ouchiyama River, evaluated by using a PIT tag system]
26. Katahira H, A Yamamoto, T Masubuchi, T Isshiki, N Watanabe, M Kanaiwa "A report on potential effects of an ectoparasite Argulus coregoni (Crustacea: Branchiura) on ayu under rearing condition" Aquaculture 543, 736980 (2021)
27. Katahira H, A Matsuda, A Banzai, Y Eguchi, TF Matsuishi "Gastric ulceration caused by genetically identified Anisakis simplex sensu stricto in a harbor porpoise from the Western Pacific stock" Parasitology International 83, 102327 (2021)
28. Katahira H, T Shimose, M Kanaiwa "New host records for Scaphanocephalus adamsi (Platyhelminthes: Trematoda: Heterophyidae) from commercial fishes off Yaeyama Islands" Fauna Ryukyuana 59, 21-26 (2021)
29. Shimose T, H Katahira, M Kanaiwa "Interspecific variation of prevalence by Scaphanocephalus (Platyhelminthes, Trematoda, Heterophyidae) metacercariae in parrotfishes (Labridae, Scarini) from an Okinawan coral reef" International Journal for Parasitology: Parasites and Wildlife 12, 99-104 (2020)
30. Katahira H, H Ashida, M Kobayashi "One-sided infections by intestinal parasites in two sympatric porpoises bycaught from the Nemuro Strait of Hokkaido, Japan" Parasitology International 77, 102118 (2020)
31. Sasaki M, H Katahira, M Kobayashi, T Kuramochi, H Matsubara, M Nakao "Infection status of commercial fish with cystacanth larvae of the genus Corynosoma (Acanthocephala: Polymorphidae) in Hokkaido, Japan" International Journal of Food Microbiology 305, 108256 (2019)
32. 片平浩孝・山本淳也・増渕隆仁・今津雄一郎・山口泰代・渡邊典浩・金岩稔 "遊漁者アンケートからみたアユ冷水病対策" 水産増殖 67, 191-195 (2019) [Preventive measures for ayu cold-water disease, inferred from a questionnaire survey for anglers]

［II］報告書・紀要等/Reports, Bulletins, and Other Publications

1. 小松謙之・片平浩孝・元木康真・高橋克也・坂西梓里・江口勇也・三浦こずえ・小泉信夫 "東京都心の屋外で冬季に捕獲されたクマネズミの系統的位置と防除対策への示唆" 麻布大学雑誌 37, 64-77 (2025) [Phylogenetic position of roof rats captured outdoors during winter in central Tokyo, Japan, with implications for control measures]
2. 藤田朋紀・勝木伸一・片平浩孝 "特集 消化管感染症のすべて2025: III. 十二指腸－小腸, (B) 寄生虫感染症, コリノソーマ症" 消化器内視鏡 37 (増刊号), 169-172 (2025) [Acanthocephaliasis (Corynosomiasis)]
3. 藤田朋紀・中村元・片平浩孝・勝木 伸一 "寄生虫疾患の病態と画像診断" 胃と腸 60, 684-694 (2025)
4. 片平浩孝 "翻訳は誰のため？世のため人のため自分のため？" 日本甲殻類学会和文雑誌 CANCER 32, 63-65 (2023) [What is your translation work for? For society, people, or yourself?]
5. 片平浩孝 "5分で読める寄生虫ばなし" 自然科学書協会会報 102, 4-7 (2023)
6. 藤田朋紀・勝木伸一・片平浩孝 "寄生虫による消化管感染症" 診断と治療 110, 905-910 (2022)
7. 片平浩孝 "ゼニガタアザラシの寄生虫研究：現状と課題" 勇魚 71, 28-34 (2019)
8. 坂西梓里・大原幸生・片平浩孝・川上泰 "日本近海産カツオにおけるアニサキス幼虫の寄生状況調査" 日本臨床寄生虫学雑誌 30, 83-85 (2019) [Isolation and identification of anisakid nematodes from the skipjack tuna (Katsuwonus pelamis) in Japanese waters]
9. 木村妙子・木村昭一・自見直人・倉持利明・藤田敏彦・駒井智幸・吉田隆太・田中隼人・岡西政典・小川晟人・小林格・小玉将史・齋藤礼弥・清野裕暉・片平浩孝・中野裕昭・吉川晟弘・上野大輔・田中正敦・大矢佑基・前川陽一・中村亨・奥村順哉・田中香月 "紀伊水道南方海域および熊野灘の深海底生動物相" 三重大学大学院生物資源学研究科紀要 45, 11-50 (2019) [Benthic deep-sea fauna in south of the Kii Strait and the Sea of Kumano, Japan]
10. Nagasawa K, H Katahira "Lernaea cyprinacea (Copepoda: Lernaeidae) infecting a rock flagtail, Kuhlia rupestris (Kuhliidae), in a subtropical river, southern Japan" Nature of Kagoshima 46, 13-15 (2019)

［III］著書等/Books and Other Publications

1. 永宗 喜三郎, 新倉 保, 神川 龍馬, 常盤 俊大, 彦坂 健児, 松崎 素道, 脇 司 他 (担当:分担執筆, 範囲:7-1~7-5, 14-6) "寄生虫の事典―医学・獣医学・生物学から人や社会とのかかわりまで―" 朝倉出版 (2026) [Encyclopedia of parasitology : from biomedical sciences to global societal impacts]
2. Poulin R 著 (片平浩孝・川西亮太・入谷亮介 訳) "寄生虫進化生態学" 共立出版 (2022) [Evolutionary Ecology of Parasites: Second Edition, written by R. Poulin: Japanese translated edition]

ティーチング・ポートフォリオ

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