Most foreigners believe that all public baths are onsen. But that’s not true. There is another type of public bath, sento, that also offers you opportunities to take a good soak.

What is the difference between an onsen and sento? The water.

Most sento, which are usually located in the center of a town, use tap or well water. Onsen, usually located on or near a volcanic mountain, contain various minerals and must meet the standard set by laws.

Sento often add artificial bathing salts or powders, various herbs, milk or even sake to the water to enhance bathing effects.