There was a time when virtually every city neighborhood had a public bathhouse. Those days are over, but the soothing waters haven't completely dried up. Here in Tokyo, there is a variety of sento from which to choose. And if traditional bathhouses aren't up to your standards, you can try kenkoland (literally, "health land") or supasento, essentially value-added sento featuring everything from gyms to cafes to putting greens.
Traditional sento cost 400 yen for adults, 180 yen for elementary school children and 80 yen for children under 6 years; prices at kenkoland and supasento vary. Usually at both types, you can stay as long as you like and it's best to bring your own towels, soap and shampoo.