Natural Onsen Ikoi no Yado Kawachinagano-so

Spring-source temperature

Not published on current main official text pages

Bathing temperature

Fixed bath temperature not published

Spring source

Nagano Onsen

Spring classification

Sodium-magnesium chloride-bicarbonate spring (hypotonic, neutral, cold spring). The current main onsen page is used as the reference. An older /r/onsen mirror retains the shorter label “sodium-magnesium chloride spring”; this discrepancy is preserved.

pH

6.4 on the current main onsen page. An older /r/onsen mirror lists 6.5; the current main page takes precedence.

Flow rate

Not published

Water handling

Natural Nagano Onsen is used in the public indoor and outdoor baths. The inn publishes annual water-quality testing, sodium hypochlorite disinfection, three daily disinfectant-concentration checks, annual high-concentration chlorine cleaning of pipes, and tub cleaning three times a week. Current main first-party pages do not fully disclose water addition, heating or recirculation for each bath, so these are not inferred. The four guest-room baths use natural spring water but are not described as open-air or free-flowing.

Analysis date

Not published

The source temperature, fixed bath temperature and yield are not published on the current main official text pages. The current main page's pH of 6.4 and full spring classification take precedence over the older /r/onsen mirror's pH of 6.5 and shorter classification; the discrepancy is retained as historical context. The ¥1,945 day-use plan includes a ¥920 meal voucher and is not bathing-only admission. Tattoo policy is not confirmed on the current main official pages.