Unzen Onsen Azumaen

A big, older lakeside ryokan where every room looks over Oshidori Pond, the baths run on the inn's own free-flowing spring and dinner ends with sushi made at your table — but only 8 of 27 rooms have a private bath, the main baths are a long walk away, and the building shows its age

Azumaen (written 東園) sits on the shore of Oshidori Pond at the quiet edge of Unzen's hot-spring town, about ten minutes' walk from its small eating street. It's a 27-room house with a 230-seat banquet hall and a Japanese garden, and every room faces the pond. In 2009 the current Emperor, then Crown Prince, stayed in its Azuma suite. Since 2015 the inn has rebuilt eight rooms with open-air or semi-open baths fed by its own spring, and added two pond-view restaurants, on the lake (2021) and in the cloud (2024). The draw is the water and the food: an acidic simple spring with hydrogen sulphide, 55°C at source, piped in free-flowing with no added water or heating according to staff, and a kaiseki of Ariake Sea seafood, Unzen akaushi beef and sushi made at your table. Japanese guests rate it 4.48 across 573 reviews on Rakuten Travel (dinner 4.62) and 4.6 across 558 on Jalan (dinner 4.8). Most recent evidence comes from booking-site reviews; only one detailed stay report (November 2023) turned up. Reviewers in 2025–2026 praise the pond views, huge rooms, the soft water, playful dishes and warm dining staff. The complaints are consistent: the building is dated, standard rooms are a long walk via the lobby and lift from the separate bath building, and some found the food or service short of the price — thin akaushi in July 2026, disappointing sashimi in April 2026, an empty front desk at check-in in August 2026. Standard rooms run about ¥19,000–28,000 per person with two meals; private-bath rooms cost far more.