Kagawa · Kan'onji & Kotohiki Park
Kotohiki Kairō open-air bathhouse, Kan'onji
讃岐路野天風呂 湯屋 琴弾廻廊
A Japanese-style spa right by Kotohiki Park in Kan'onji, western Kagawa — famous for the giant coin drawn in sand, the Zenigata Sunae — and directly in front of Ariake beach. Its baths are inventive: a 'seawater onsen' bath, an ancient-cypress bath and a kama-buro steam bath recreating a 1,200-year-old design (alternating men/women daily), and the open-air bath looks over the Seto Inland Sea toward the sunset. Adults ¥950 on weekdays, ¥1,100 on weekends and holidays; open 11:00–23:00 (last entry 22:00), every day of the year. A sea-view restaurant, indoor and outdoor rest areas and lodging are attached. About 5 minutes by car from JR Kan'onji Station or 15 from Sanuki-Toyonaka IC; 500 parking spaces. Combine with the Chichibugahama sunset and the sand coin.
- Price (adult)
- ¥950
- Hours
- 11:00–23:00
- Closed
- Open daily
- Access
- About 5 min by car (25 min on foot) from JR Kan'onji Station; about 15 min by car from Sanuki-Toyonaka IC
- Water type
- Simple spring
- Tattoos
- Ask ahead
- Phone
- 0875-24-4567
- Official site
- kotohiki-kairo.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Kan'onji & Kotohiki Park. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- On Ariake beach, sunset over the Inland Sea
- Seawater bath and a 1,200-year-old steam bath
- Pair with the sand coin; open daily
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.
- Last entry is 30–60 minutes before closing.
Features
Mood & scenery
Sauna & wellness
Price
Amenities
✔ Verified operating: 2026-09 公式サイト（大人平日950円・土日祝1,100円・11–23時 受付22:00・年中無休）
Prices and hours change. Check official sources before visiting.
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