Sauna & Hotel Karumaru Ikebukuro is a men-only sauna complex with capsule and hotel rooms in Ikebukuro. It has four saunas: a rock sauna lined with Aji granite with auto-löyly and aufguss, a kelo sauna with self-löyly, a one-person herbal steam barrel and a wood-fired stove sauna. Four cold baths range from a single-digit plunge with jets to 33 °C, and there is an open-air jacuzzi. Entry ¥3,480, or ¥1,980 for 60 minutes; open 11:00 to 10:00 the next day, baths until 9:00. No tattoos.