海門寺温泉 Kaimonji onsen
(かいもんてらおんせん Kaimonji onsen)
Open-air outdoor bath
Enclosed indoor bathing area
Dry heat sauna room
Cold water plunge bath, typically used after sauna
Uses natural hot spring water
Free-flowing water, not recirculated
Private bath available for day-use visitors or hotel guests to reserve
Private onsen bath in guest rooms — for overnight guests only
Shared bathing area for all genders
Allows entry with visible tattoos
Welcomes children and families
Restaurant or dining open to visitors (not just hotel meal plans)
Shower, wash stations, soap and shampoo provided
Towels available to rent or borrow
Relaxation space for after bathing
On-site or nearby parking available
70. Kaimonji Onsen, Beppu Old-school grandpa onsen. Inside a small building there are two baths with clear water: one hot, the other hot+. There's a micro-bath with very hot water for washing with a ladle. Breathing inside is fine. Entry is 250, so soap/shampoo are separate. They give you a stamp. Quite a few visitors at 7 PM, but only Japanese — from school-age kids to elderly men.