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Our guide
Iwamuro Onsen is a hot spring in Nishikan Ward, Niigata, in what was once Echigo Province, and the name of the district around it. It is known for its strongly salty, sulphurous “black water”.
Sado-Yahiko-Yoneyama Quasi-National Park is about 1.5 km away, and Yahiko Shrine is about 4.1 km off in a straight line. We have not checked a public-transport route or individual inns, so look for local information before you go.
Written by japan-spots.com (2026-09-22) from the sources credited on this page. Distances are straight lines between map positions.
Photos
Photos from Wikimedia Commons, each under its own licence — see credits
- Iwamuro-onsen,Niigata-city,Niigata,Japan — Nihongo1234 · CC BY-SA 4.0 · source · resized
- Old Niigata r2 Ishize April2020 — Drph17 · CC BY-SA 4.0 · source · resized
What this place is
Iwamuro Onsen (岩室温泉) is a hot spring in Nishikan-ku, Niigata, Niigata Prefecture (formerly Echigo Province), and also the name of the district. It is known for its strongly salty, sulphurous "black water".
Background text translated from Japanese Wikipedia (CC BY-SA 4.0)
What to expect at this type of place: Hot spring
Getting there
We do not have step-by-step transit directions for this spot yet. Open the location on Google Maps for routes from where you are staying.
Stay the night
An onsen town is at its best in the evening and early morning, after the day visitors have gone.
Hotels near Iwamuro Onsen on Agoda
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