Hotel Mikawa Kaiyoukaku
ホテル三河 海陽閣ほてるみかわかいようかく
Bay-view baths that swap sides each morning at a Gamagori hot spring hotel
Day Use
YesLast entry is 30 minutes before closing for both the morning and afternoon day-use sessions. Day-use bathing is closed on maintenance days and any day the hotel is booked out for a private event; the exact dates aren't published in advance.
Elementary school age is 1,000 yen and infants (age 2 and up) are 700 yen, against the 1,500 yen adult rate. Towels cost extra: a face towel is 200 yen and a bath towel rental is 300 yen (bring your own to skip the fee).
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Two named baths, each with its own outdoor bath: Kukai-no-yu and Kannon-no-yu, swapped between men/women each morning.
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
A reviewer explicitly wishes for a cold plunge bath, implying there isn't one; the official facility's bath-count list (rotenburo/naiyu/sauna, men:1/women:1 each) does not list a cold bath either.
Bathing Arrangements
A private bath you can reserve for yourself or your group
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Small, one-point tattoos are allowed; larger tattoos are not addressed but likely excluded.
Welcomes children and families
Children of elementary-school age and up must bathe on their own gender's side; younger children may accompany an opposite-sex parent.
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Body soap and shampoo/conditioner are provided at the large bath; washing-station count not separately stated.
Towels to rent or borrow at the desk
On-site or nearby parking available
Views
Sea
MountainsPrograms
About
A relaxed hot spring hotel overlooking Mikawa Bay, featuring simple tatami rooms. The onsen offers a calm atmosphere for soaking and enjoying the view.
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Last updated October 7, 2026