Tennen Onsen Jab

Jab is a day-use bathhouse and leisure complex on the western edge of Yokkaichi, built around a proper bathing floor. The indoor bath and the outdoor bath, rotenburo (露天風呂), are both fed by real spring water kept flowing fresh, kakenagashi (掛け流し), rather than recirculated. There's a sauna room with its own cold bath next door, a waterfall bath called utaseyu (打たせ湯), and a jet bath (nicknamed the Jabina Bath) tucked by the showers that one longtime visitor calls an overlooked favorite since it's rarely crowded. The water itself has a faint green tint and a slightly silky feel, with real mineral flakes, yunohana (湯の花), floating in it. Outside, three tent saunas (one wood-fired, two electric) can be booked separately, and a free simplified rock-bed bath, ganbanyoku (岩盤浴), is included for anyone already bathing. The rest of the building works more like a small leisure center than a typical sento (銭湯): a manga corner, free Wi-Fi and internet terminals, karaoke rooms, a kids' area with an outdoor RC car circuit, a recording studio, hands-free BBQ, and an on-site coin laundry. It's an older building with a plain, Showa-era (昭和) feel rather than a polished resort, but the food gets real praise (a crab cream croquette set comes up in more than one review) and it draws steady crowds of local families on weekends.