The temple was founded in the 8th century by the Buddhist priest Shodo Shonin after he discovered the Yumoto hot springs.
Unlike most Japanese temples where hot springs are restricted, this facility specifically maintains an onsen for visitor purification.
The water is naturally cloudy and sulfur-rich, characteristic of the volcanic activity in the Oku-Nikko region.
The interior contains a statue of Yakushi Nyorai, often venerated for relief from physical ailments.
The temple's maintenance is overseen by the administration of Rinno-ji, one of Nikko's most significant temple complexes.
Nikkozan Onsen-ji Temple is a rare Buddhist temple in Nikko that features an onsen, or hot spring bath, available for public use. It serves as a branch temple of the renowned Rinno-ji Temple and is historically linked to the discovery of the Yumoto hot spring waters. The temple enshrines Yakushi Nyorai, the Buddha of Healing, aligning with the therapeutic reputation of the local sulfuric thermal springs. Visitors can bathe in the temple's private onsen, which is supplied by the same sulfur-rich water source found throughout the Yumoto Onsen area. The wooden structure maintains a traditional aesthetic typical of the mountainous Tochigi region. It is situated within the Nikko National Park area, surrounded by the natural volcanic landscape of Yumoto.
The wooden exterior entrance gate against the backdrop of the mountain forest.
Bring your own small towel, as they are not always provided for the onsen bath.
Check the temperature of the water before entering, as natural sulfur springs can be significantly hot.
Visit during a weekday to avoid crowds from local ryokan guests.
Do not attempt to photograph the interior bathing area while others are present.
Occasionally closed during the winter months or for irregular maintenance; check local Oku-Nikko tourism updates before arrival.
Remove shoes before entering the temple interior; follow standard Japanese onsen bathing etiquette including showering before entering the main tub.
