Solaniwa Onsen Osaka Bay Tower

耶拉维奇
It's good value for money, and guests staying at the ART Hotel get a 50% discount. The onsen (hot spring) is open from 11:00 AM to 11:00 PM; don't go too early. There's a local Japanese supermarket and a duty-free shop down the escalator at the onsen entrance. Nearby are also Wagyu beef barbecue and a delicious conveyor belt sushi restaurant (it's very popular, so be prepared to queue).