Miyagi · Kamasaki Onsen, Shiroishi
Kamasaki Onsen Mogamiya Ryokan
鎌先温泉 最上屋旅館（奥羽の薬湯）
A wooden inn founded in 1789 at Kamasaki Onsen, a mountain cure spa in Shiroishi, Miyagi, where villagers are said to have struck hot water with the tip of a sickle more than 600 years ago. Its iron-bearing sulphate water, known as the 'medicinal bath of Ōu', turns tea-brown and has long been trusted for cuts and bruises. Gleaming dark corridors, glass shōji and traces of the old self-catering cure wing make it irresistible to lovers of retro Japan. Day use 11:00–14:00, ¥800; bring a towel. Fifteen minutes by car from Shiroishi-Zaō Station — a convenient stop with Shiroishi Castle, the Yajirō kokeshi village or the start of the Zaō Echo Line. Day bathing is sometimes suspended when busy or for cleaning, so phone ahead.
- Price (adult)
- ¥800
- Hours
- 11:00–14:00
- Closed
- Irregular (check ahead)
- Access
- 15 min by car from Shiroishi-Zaō Station (Tōhoku Shinkansen); or about 20 min by Shiroishi city bus (for Yajirō Kokeshi-mura, no weekend service) from JR Shiroishi Station to Kamasaki Onsen; 15 min by car from Shiroishi IC
- Water type
- Sulfate spring
- Tattoos
- Ask ahead
- Phone
- 0224-26-2131
- Official site
- www.mogamiya.com ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Kamasaki Onsen, Shiroishi. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Wooden inn from 1789 with cure-spa air
- Tea-brown 'medicinal bath of Ōu'
- 11–14, ¥800; phone ahead
Before you go
- No official tattoo policy is published — ask at reception.
- Ryokan day-use hours are limited and may be suspended in peak season — phone the same morning.
- Payment is usually by ticket machine in cash — bring coins.
- Last entry is 30–60 minutes before closing.
Features
Mood & scenery
Price
Who with
Convenience
Amenities
✔ Verified operating: 2026-09 白石市観光サイト 2026-01（日帰り11–14時・小学生以上800円）／ニフティ温泉
Prices and hours change. Check official sources before visiting.
More in this area
Taki-no-Yu, Naruko
A communal bath with over a thousand years of history as the shrine's sacred spring. Milky acidic sulfur water pours like a waterfall from log flumes into cypress tubs. ¥300; bring your own soap.
Naruko Waseda Sajiki-yu
A communal bath using a spring that Waseda University students struck during fieldwork in 1948. Architect Osamu Ishiyama's yellow avant-garde building is unmistakable; descend the stepped 'sajiki' gallery to the bathroom. The modern counterpart to Taki-no-yu.
Akiu Onsen Public Bath
The only communal bath in Akiu Onsen, Sendai's classic hot-spring retreat. Among upscale ryokan charging ¥1,000-plus for day use, this humble bathhouse offers free-flowing chloride spring water for ¥300. Near the Yakushi-do temple at the source, it has a single tub and a mostly local crowd; soap is sold, not provided, and a sign asks for 40-minute stays. About 55 minutes by bus from Sendai Station, right by the Yumoto stop.