Naoshima Bath I♥湯

Shinro Ohtake's 2009 working sento, where the building itself is the artwork. The exterior is a collage of palm trees, neon signs, and salvaged ceramics; the bath inside has an elephant sculpture standing over the wall between the men's and women's sections. Locals genuinely use it. Bring a small towel and ¥660 — it operates on standard sento hours and is not a tourist showpiece.