April 26, 2026 is the 'Once-in-a-Millennium Good Bath Day'. Showa Retro Hot Spring Bathhouse Tamagawa Onsen Holds Special Events Including Free Admission for Children and Hot Spring Face Packs.
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Tamagawa Onsen will hold special events on April 26, 2026, the 'once-in-a-millennium good bath day', offering free admission for children and free hot spring face packs to promote bathhouse culture.