Osawa Onsen, Hanamaki South Onsenkyo, Iwate
Osawa Onsen Tojiya
A strong first stop in Hanamaki South Onsenkyo if you want a low-cost bath and several different bathing areas. Visitors who avoid mixed bathing can still use the gender-segregated baths; the shared Osawa-no-Yu has a strict no-swimwear, no-bath-towel rule.
Check before bathing
- Opening hours
- Day use 07:00–20:30 reception; bathing ends at 21:00. Adult admission ¥700; children ¥400. The women's-only hour at the mixed-gender Osawa-no-Yu is 20:00–21:00 daily. Some baths may close temporarily for cleaning; the operator's page starts day use at 07:00, while the tourism association still lists 07:30.
- Tattoo policy
- No current tattoo policy was confirmed in the research file. Ask the inn before visiting.
Spring & water temperature
- Spring-source temperature
- 51.3°C according to the inn's current spring overview; not the fixed temperature of any of the four pools.
- Bathing temperature
- No fixed pool temperatures are published.
- Spring classification
- Alkaline simple spring; hypotonic, alkaline and high-temperature.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The inn FAQ identifies Osawa-no-Yu, Yakushi-no-Yu and Kawabe-no-Yu as source-flowing. Day visitors may also use Toyosawa-no-Yu at Senzankaku, but the current FAQ does not make the same pool-specific source-flowing claim for it. Treatment details differ by bath and are not fully published.
Swimwear and wrapped bath towels are not allowed in the mixed-gender Osawa-no-Yu.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
