Ikoi Ryokan

Spring-source temperature

68°C, as listed on the inn's current bath page

Bathing temperature

Not published

Spring source

Kurokawa Onsen water; the current pages checked do not identify an individual source

Spring classification

Salt- and sulfur-bearing spring / simple spring, as stated by the inn

pH

Not published

Flow rate

Not published

Water handling

The inn explicitly describes its spring water as free-flowing. Other treatment details are not fully published for every pool.

Public day use is ¥800 for adults and ¥600 for ages three through elementary school, 08:30–21:00 with last entry at 20:30. Private baths are charged per person, not per room, and are not reservable in advance. Overnight guests have priority after 15:00. Day visitors must park in the shared or day-use area. Tattoo rules are unconfirmed.