
The Spa at HOSHINOYA Tokyo is a distinctive wellness experience rooted in Japanese tradition, housed within the city-centre ryokan in the Otemachi district of Chiyoda-ku. Crowning the building's top floor, the onsen is fed by salty hot spring water drawn from 1,500 metres below ground, rich in sea minerals and seaweed compounds known for their beautifying and restorative properties, with both indoor and outdoor baths beneath an open skylight. Spa therapies are deeply personalised, beginning with a restorative bath and stretching session before moving into targeted oil treatments designed to refresh the body and uplift the spirit. HOSHINOYA Tokyo also offers the Edo Beauty Stay, a curated two-day wellness retreat drawing on traditional arts and beauty rituals once cherished during the Edo period, blending cultural immersion with holistic rejuvenation in the heart of the Japanese capital.