Greenpia Onuma
リブマックスリゾート函館 グリーンピア大沼
Hot-spring bathhouse at a forest resort hotel below Mount Komagatake
Day Use
YesLast admission for day-use bathing is 20:00, an hour before closing.
Discounted rate of 900 yen for seniors and students, 500 yen for children (age 3 through elementary school).
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
Welcomes children and families
Children under 4th grade of elementary school must bathe with a guardian.
Towels to rent or borrow at the desk
On-site or nearby parking available
Views
ForestAbout
Greenpia Onuma is a resort hotel in the forest below Mount Komagatake, with a hot-spring bathhouse open to day visitors as well as guests. The outdoor bath, called Shukunobe-no-yu (しゅくのべの湯), sits alongside indoor tubs and a hiba-wood sauna, with a restaurant next to the bathhouse. A guest describes the water as a slightly silky sodium-salt spring.
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Last updated September 29, 2026