Reservation required
Please call with your preferred
date, time, and number of guests.
FERMENTATION EXPERIENCE IN OTARU
Surrender to the warmth
of fermentation.
Wrapped in warmth created by fermentation—
a unique bathing experience in Otaru.
Reservation required Reception 10:00–17:00 Closed on Wednesdays and Thursdays
Adults ¥1,800
Includes bathwear and towels.
View prices10:00–17:00
Closed Wednesday and Thursday
HoursOtaru, Hokkaido
1-22-24 Sakura, Otaru
AccessFEEL THE FERMENTATION
From drinking fermentation
to being wrapped in it.
Otaru Ion House is a dry-bathing facility where conifer sawdust mixed with Ohtaka Enzyme extract is warmed naturally by microbial fermentation. The experience includes a fermented botanical drink before bathing and skincare afterward.
THE BATH
Warmth created without direct heating—
the warmth of fermentation.
Your body is covered in naturally warmed sawdust. Staff assist every first-time guest.
About 10–15 min Typical bathing timeNothing special to bring Bathwear and towels includedReservation required Calm information
First VisitOHTAKA ENZYME
A century of fermentation.
Ohtaka Enzyme’s long-developed philosophy and fermentation expertise are at the heart of Otaru Ion House.
1926Created a fermented botanical drink
1961Opened the first Ion House
1972Supported the Sapporo Winter Olympics
FERMENTATION JOURNEY
Discover it. Feel it. Take it home.
Discover fermentation
Learn how sawdust warms naturally and discover the world of fermentation.
Experience it firsthand
Be surrounded by warmth and fragrance and experience fermentation through your senses.
Bring it into daily life
A starting point for discovering Ohtaka Enzyme products and a life with fermentation.