Ikimono KokuhoLiving Treasures of Japan
Prefectural Natural Monument
Amphibians

Otton Frog

Babina subaspera

Photo: Nippon510 / CC BY-SA 4.0 / Wikimedia Commons

The Otton frog is a large, sturdy frog found on Amami-Oshima, Kakeromajima and Edatekujima. It lives in evergreen broadleaf forests and nearby water bodies, eats insects and other small animals at night, and has a distinctive deep call. Endemic to these Amami islands, it is designated a Natural Monument of Kagoshima Prefecture.

Scientific name
Babina subaspera
Group
Amphibians
Prefectures
Kagoshima
Japanese Red List (Ministry of the Environment)
VulnerableMinistry of the Environment 5th Red List (2026)
日本語
オットンガエル
简体中文
奄美大蛙

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Natural Monuments related to the Otton Frog

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Designated as a species without a fixed area. Markers show related prefectures.

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Frequently asked questions

Yes. The Otton Frog is protected as a Natural Monument (0 national and 1 prefectural designations). Each designated site is listed under "Natural Monuments related to the Otton Frog" on this page.

The Otton Frog is designated as a species without a fixed area and lives in places such as Kagoshima.

The Otton Frog is listed as "Vulnerable" in the Ministry of the Environment 5th Red List (2026) (listed as オットンガエル).

Animals related to the Otton Frog

Animals in the same group or designated in the same area.

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