WACHI Nakatada

写真a

Title

Assistant Professor

Researcher Number(JSPS Kakenhi)

40635299
4 8 7 8 8
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Tropical Biosphere Research Center   Assistant Professor  

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Research Interests 【 display / non-display 】

  • Molecular Ecology

  • Insect Taxonomy

  • Population Genetics

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Research Areas 【 display / non-display 】

  • Life Science / Biodiversity and systematics

  • Life Science / Ecology and environment

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Published Papers 【 display / non-display 】

  • Field observation of predation on insects in mangrove habitat at Iriomote Island, the Yaeyama Islands, southwestern Japan

    Nakatada Wachi, Suzuki Noriyuki, Tohru Naruse, Yuki G. Baba

    Entomological Science ( Wiley )  29 ( 1 )   2026.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Abstract Mangrove forests form vital interfaces between aquatic and terrestrial ecosystems, supporting a wide variety of organisms, both vertebrates and invertebrates. Although insects have long been underrepresented in mangrove research, particularly compared with studies on plant biology and ecosystem functioning, recent findings suggest that their diversity and ecological importance are greater than previously recognized. Nevertheless, their roles in trophic interactions, especially as prey, remain poorly understood. Here, we document six instances of insect predation from a mangrove habitat on Iriomote Island, the Yaeyama Islands, Japan. These include predation by fish, crabs, spiders, dragonflies, wasps and flies on various insect taxa, some of which are associated with mangrove environments. Although fragmentary, these records indicate that insects contribute to mangrove food webs not only as herbivores and detritivores but also as an important prey resource for a broad range of predators. Our observations underscore the need for further research into insect‐mediated trophic relationships in mangrove ecosystems.

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      DOI

  • Occurrence of Eoophyla gibbosalis (Guenée, 1854) (Lepidoptera: Crambidae: Acentropinae) from Ishigaki Island, the Yaeyama Islands, Southwestern Japan

    WACHI Nakatada

    日本昆虫分類学会会報 ( 日本昆虫分類学会 )  31 ( 2 ) 313 - 317   2025.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    The genus Eoophyla (Lepidoptera: Crambidae, Acentropinae) is a diverse group widely distributed from the Oriental to the Australasian region, whose larvae are typically aquatic. In Japan, three species are currently known, including Eoophyla gibbosalis (Guenée, 1854), first recorded from Yonaguni Island in 2011 and later reported from the island of the Okinawa and Amami Islands. Here, I report the first record of E. gibbosalis from Ishigaki Island, representing the second locality in the Yaeyama Islands. A male specimen was collected near a water cascade within an ornamental pond of a hotel garden. I conducted a review of published Japanese records and a systematic survey of iNaturalist observations across the species’ range. This record fills a gap in the known distribution of E. gibbosalis in the Ryukyu Islands and may suggest ecological flexibility, although incidental occurrences cannot be excluded. ZooBank LSID: https://zoobank.org/References/EB95C6F2-A307-4ADE-AF92-EC53227C0F74

  • Recent additional records of the little-known mydas fly, Nemomydas gruenbergi (Hermann, 1914) (Diptera, Mydidae), from Iriomote Island, southern Japan, with the first documentation of mating and oviposition

    Nakatada Wachi, Yosuke Yoshida

    Check List ( Pensoft Publishers )  21 ( 6 ) 1067 - 1073   2025.11 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Mydas flies (Diptera, Mydidae) are primarily found in arid and semi-arid regions, with few records from East Asia. In Japan, Nemomydas gruenbergi (Hermann, 1914) is the only known species, previously reported mainly from southern Iriomote and Ishigaki Islands in the Yaeyama Islands, with very few records from northern Iriomote. Here, we report newly confirmed occurrences from northern Iriomote Island, based on direct observations and specimen collections conducted in summer. Observations include, for the first time to our knowledge, photographic documentation of a mating pair and confirmed oviposition behavior.

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      DOI Open Access

  • A new distributional record of Anthrax aygulus Fabricius, 1805 (Diptera, Bombyliidae) and additional records of Anthrax koshunensis Matsumura, 1916 from the Yaeyama Islands, Okinawa Prefecture, Japan.

    Wachi Nakatada, Kohama Tsuguo, Osada Masaru

    Fauna Ryukyuana   77   63 - 66   2025.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Anthrax aygulus Fabricius, 1805 (Diptera, Bombyliidae) was collected from Haimi and Uehara, Iriomote Island, and is reported here as the first records from the Yaeyama Islands, as well as from the island itself. Moreover, Anthorax koshunensis Matsumura, 1916 was additionally recorded based on individuals collected from Funaura, Iriomote Island.

  • New island record and seasonal activity of Eucibdelus (Eucibdelus) ishigakiensis Hayashi, 1997 (Coleoptera, Staphylinidae, Staphylininae) from Iriomote Island, southern Japan, including notes on behavior and long-term records by an amateur naturalist

    Hirai, K; Wachi, N; Shoyama, M; Arai, S

    CHECK LIST ( Pensoft publishers )  21 ( 5 ) 877 - 883   2025.09 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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      DOI Open Access

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Other Papers 【 display / non-display 】

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2025.04  -  2028.03 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2024.04  -  2027.03 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2023.04  -  2028.03 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  • A diachronic study of Ryukyuan languages and Kyushu dialects from descriptive and historical-comparative perspectives

    Grant-in-Aid for Scientific Research(A)

    Project Year: 2022.04  -  2025.03 

    Direct: 32,800,000 (YEN)  Overheads: 9,840,000 (YEN)  Total: 42,640,000 (YEN)

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2021.04  -  2024.03 

    Direct: 3,200,000 (YEN)  Overheads: 960,000 (YEN)  Total: 4,160,000 (YEN)

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SDGs 【 display / non-display 】

  • 生物多様性の実態把握・保全・持続可能な利用

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Social Activity 【 display / non-display 】

  • 2026.02
    　
    　

  • 2025.12
    　
    　

  • 2025.06
    　
    　

  • 2025.05
    　
    　

  • 2025.02
    　
    　

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Media Coverage 【 display / non-display 】

  • マングローブの昆虫　多様な生物の餌に　西表島で捕食場面を観察　琉大研究チーム報告  Newspaper, magazine

    八重山毎日新聞社  八重山毎日新聞  8面  2026.1

    Author： Other 

  • 石垣島で珍しい水生ガを初確認　ミツクロモンミズメイガ　八重山で2地点目、助教の娘が発見  Newspaper, magazine

    八重山毎日新聞社  八重山毎日新聞  8面  2026.1

    Author： Other 

  • 世界的に珍しいハエ、繁殖行動を世界で初めて撮影、ムシヒキアブモドキ  Newspaper, magazine

    八重山毎日新聞社  八重山毎日新聞  3面  2025.11

    Author： Other 

  • 西表島で珍しいツリアブ2種確認　八重山初記録も  Newspaper, magazine

    八重山毎日新聞社  八重山毎日新聞  3面  2025.11

    Author： Other 

  • 石垣固有の甲虫 西表にも イシガキハイイロハネカクシ 昆虫愛好家・庄山さん 20年超観察 琉大、地元協働で研究発表  Newspaper, magazine

    琉球新報社  琉球新報  18面  2025.10

    Author： Other 

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