Taiseikan

A long-established seaside hot spring inn in Ajiro, proud of free-flowing spring water in every room

Shizuoka Atami City

Taiseikan is a seaside ryokan nestled in the tranquil Ajiro Onsen area of Atami City, Shizuoka Prefecture. Its biggest attraction is the private hot spring source that has flowed continuously since the inn first opened in the early Showa era, served in every bath with an all-free-flow system that minimizes the use of added water and circulation. The highly concentrated chloride spring is known for its excellent heat-retention properties and for keeping bathers warm long after they get out. From the private panoramic cypress bath on the top floor, guests can take in sweeping views of Ajiro’s beautiful sea, and even the open-air baths in the guest rooms offer a completely private experience with natural free-flowing spring water.

Hot Spring & Bath Information

Large Bath and Open-Air Bath

TypeNatural Hot Spring

Flow-through

The large bath and open-air bath let you enjoy the inn’s private spring, Kamome-yu, which wells up from about 400 m underground on the property, with temperature adjustment through added water kept to a minimum and served in an all-free-flow system. This highly saline water is also known as the hot water of warmth. The salt that adheres to the skin helps prevent sweat from evaporating, giving it exceptionally strong heat-retention effects. It helps ease cold sensitivity and neuralgia, and the warmth lasts long after you leave the bath.

Private Panoramic Cypress Bath Unkai and Bouyou

TypeNatural Hot Spring

Flow-through

A spectacular private panoramic cypress bath on the top floor. Soaking in the tub at your leisure, you can have the tranquil sea and sky of Ajiro spread out below all to yourself. Here too, the inn’s chloride spring flows generously in free-flow form, and you can spend a private, soothing time with someone special while enjoying the fragrance of cypress and the sea breeze.

Business Hours

Monday
14:00〜10:00
Tuesday
14:00〜10:00
Wednesday
14:00〜10:00
Thursday
14:00〜10:00
Friday
14:00〜10:00
Saturday
14:00〜10:00
Sunday
14:00〜10:00
Holiday
14:00〜10:00

Closed Days: None

Address

〒413-0102 Shizuoka Prefecture, Atami City, Shimotaga 141

Hotel & Ryokan

Gender Access

Gender Separated

Tattoo Policy
No tattoo-specific restriction
Premium Magazine

Japan's Must-Visit Finest Onsen & Sauna Facilities

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.

Learn more