Momoji Hot Spring is a wild thermal spring located in Nakanojo, Gunma Prefecture, Japan — a mountainous region known for its many onsen. The open-air pool is reached through wild bathing.
Insider tip — Momoji (Momiji) Hot Spring — natural hot spring in the Nakanojo/Agatsuma area of Gunma prefecture, near the onsen resort corridor leading to Kusatsu and Shima Onsen. 'Momiji' (autumn maple) is a classic Japanese aesthetic motif. A quiet mountain onsen in Gunma's forested hot spring heartland — Japan's #1 prefecture for onsen.