A sento is a public bathhouse, a place Japanese people have historically gone to wash and soak when their own homes lacked a proper bath. For much of the twentieth century, sento were woven into the rhythm of ordinary neighborhood life, a spot to run into neighbors, catch up on local news, and relax in hot water after a long day.
The basic layout has stayed fairly consistent for decades. Visitors wash and rinse thoroughly at low stools facing the wall before ever stepping into the communal tub, since the bathing water itself is meant to stay clean for everyone. Men's and women's sections are kept separate, usually divided by a wall with a shared mural, often a painted scene of Mount Fuji, on either side.
Sento numbers have fallen sharply since their peak. As more homes were built with private bathrooms starting in the 1960s and 1970s, the practical need for a public bath declined fast, and thousands of neighborhood sento across Japan quietly closed. Tokyo alone has lost the large majority of the sento it once had, with the survivors concentrated in older, traditionally working class neighborhoods.
What has kept many remaining sento open is less about hygiene now and more about everything else they offer. A proper soak in genuinely hot water, a sense of community that a private bathroom cannot replicate, and in some cases retro architecture and tiled murals that have become attractions in their own right for younger visitors and tourists.
A newer generation of sento owners has started renovating old bathhouses with design conscious touches, craft beer taps, and social media friendly interiors, drawing a younger crowd that might otherwise never have set foot in one. Some cities have also stepped in with subsidies to help keep historic sento financially viable.
Sento should not be confused with onsen, which specifically use natural hot spring water, though the bathing etiquette at both is largely the same. For a visitor to Japan without an onsen trip planned, a local sento is often the easiest and cheapest way to experience the same unhurried, communal bathing culture.