Japanese Dormouse

Glirulus japonicus

The Japanese Dormouse is a small, mouse-like mammal found only in Japan, with a single dark stripe down its back. Nocturnal and agile in trees, it hibernates by lowering its body temperature in the cold season. It lives in mountain forests of Honshu, Shikoku, and Kyushu and is designated a Natural Monument.

Scientific name: Glirulus japonicus
Group: Mammals
When to see: May to October
日本語: ヤマネ
简体中文: 日本睡鼠

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Natural Monuments related to the Japanese Dormouse

National Natural Monument

MammalsAnimal

Japanese Dormouse

Glirulus japonicus

When to see

Best timeSeason

A small nocturnal tree-dwelling mammal that hibernates. According to Gifu Prefecture, it enters hibernation in tree hollows or under leaf litter before the first snow and wakes around May after the snowmelt.

Exhibit source

Frequently asked questions

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

The Japanese Dormouse is mainly seen in May to October. A small nocturnal tree-dwelling mammal that hibernates. According to Gifu Prefecture, it enters hibernation in tree hollows or under leaf litter before the first snow and wakes around May after the snowmelt.