No. 26 · Miyagi

Akiu Onsen

Akiu Onsen ranked No. 26 in the published 2025 Japan hot-spring destination list. Check bathing options, access and stay details before planning your visit.

Spring information

Water and bathing details for Akiu Onsen

Facility-level figures; blank town-wide averages are not inferred.

Named facility records for Akiu Onsen. Figures marked “Not published” are not treated as town-wide averages.

Facility	Spring	Source data	Supply	Bath type
Akiu Onsen Public Bath	Sodium-chloride spring; low salinity, weakly alkaline and high-temperature spring. Source: Akiu Onsen No. 2 and New No. 4 mixed source.	Source temperature: 52.2°C in a recent secondary transcription of the on-site analysis notice. pH: 8.0 in the recent secondary transcription.	A recent secondary record of the on-site analysis notice describes the indoor public bath as source-flowing, undiluted, unheated, non-circulating and without disinfection. The current first-party day-use list does not publish a full treatment table, so this description is limited to that on-site record.	Day-use bath. A very affordable, no-frills indoor public bath for a simple soak in Akiu Onsen. It has no outdoor or private bath, and closes on the fourth Wednesday of each month.
Ichitaro-no-Yu at Tenshukaku Natural Park	Low-salinity, weakly alkaline, high-temperature spring; a complete ionic classification has not been confirmed. Source: Ichitaro-no-Yu spring; the exact source name and extraction point are not published on the current main pages.	Source temperature: Not published. pH: 7.7.	Natural spring water is used in the cypress indoor bath and two garden outdoor baths. Pool-by-pool dilution, heating, circulation and disinfection details are not fully published.	Day-use bath. A garden-side bath for visitors who want an indoor cypress pool and outdoor baths, with a garden stroll included in the usual visit. Weekday hours are short, and the monthly closure rule has exceptions in August and October.
Hotel Hananoyu Day-Use Onsen	Sodium-calcium chloride spring. Source: Hananoyu private spring.	Source temperature: Not published in the current main pages. pH: Not published.	The hotel identifies its own natural spring. The private outdoor bath and open-air baths attached to guest rooms are explicitly source-flowing; treatment details for the regular day-use indoor and riverside baths are not fully published.	Day-use bath. A day-use hotel bath with indoor and riverside outdoor pools, plus a separately booked private outdoor bath. It closes to day visitors on Tuesdays and Fridays unless the day is a public holiday; the current day-use section takes precedence over older duplicated text elsewhere on the spa page.