Musashi-tomiyo (Saitama stickleback)
Pungitius nakamurai
Photo: Totti / CC BY-SA 4.0 / Wikimedia Commons
The Musashi-tomiyo is a stickleback found only in the Moto-Arakawa River in Kumagaya, Saitama Prefecture, and depends on clean spring water. It lives among water plants and builds nests in the breeding season. With a very limited range, it is a seriously endangered freshwater fish under protection.
- Scientific name
- Pungitius nakamurai
- Group
- Fish
- Prefectures
- Saitama
- Japanese Red List (Ministry of the Environment)
- Critically EndangeredMinistry of the Environment Red List 2020
- 日本語
- ムサシトミヨ
- 简体中文
- 武藏刺鱼
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Where to see the Musashi-tomiyo (Saitama stickleback)
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Frequently asked questions
The Musashi-tomiyo (Saitama stickleback) is designated as a species without a fixed area and lives in places such as Saitama.
You can see the Musashi-tomiyo (Saitama stickleback) at Inokashira Park Zoo, Kumagaya City Musashi-tomiyo Conservation Center, Saitama Aquarium, among others (confirmed on each facility's official website on 2026-10-15).
The Musashi-tomiyo (Saitama stickleback) is listed as "Critically Endangered" in the Ministry of the Environment Red List 2020 (listed as ムサシトミヨ).
Animals related to the Musashi-tomiyo (Saitama stickleback)
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