In Japan, onsen (温泉) are hot springs and the bathing facilities and traditional inns around them. There are approximately 25,000 hot spring sources throughout Japan, and approximately 3,000 onsen establishments use naturally hot water from these geothermally heated springs.
Location:
Edo-Tokyo Open-Air Architectural Museum
〒184-0005 東京都小金井市桜町3-7-1（都立小金井公園内）
INSIDE Japanese ONSEN (温泉) – Old Bathhouse Building Tour