Kazusa-Kiyokawa Station × Pet-Friendly StaysRecommended Hotel·Ryokan

Old Rookie Sauna Hotel is a one-of-a-kind sauna hotel made possible by the membership-based flat-rate sauna "Old Rookie Sauna," operating in four locations across Tokyo. Each room features a private, authentic sauna and a chilled water bath, creating a completely private relaxation space. The concept is "Sauna-First Stay." During your stay, you can enjoy the sauna at your own pace without ever leaving your room. Experience an extraordinary escape with saunas always available in Kisarazu, away from the hustle and bustle of the city. On the balcony under the starry sky, feel the sea breeze and indulge in ultimate relaxation.

The moment you open the door, the atmosphere changes. THE MILL STUDIO HOTEL is a private, one-group-per-day Hotel created from a former photo studio—an entire 124 m² single-floor space reserved exclusively for you. With iron black, reclaimed-wood brown, and navy accents reminiscent of Brooklyn warehouses, every angle feels picture-perfect. Enjoy the spacious interior as if it were your own home.Steel-framed windows crafted using recreated 1930s welding techniques and cedar reclaimed-wood flooring once used in an old wine factory bring texture and history to the space. Carefully chosen materials throughout make it not only beautiful, but a place that enriches the time you spend here.Without worrying about anyone else—wherever you like, however you like. Cook with ingredients you’ve picked up in the all-stainless kitchen, then gather around the large dining table for long conversations at night. Sink into the sofa with coffee in hand and enjoy a slow morning until check-out at 1:00 PM. Pets and children are welcome, for up to 8 guests.Set on a hill in a quiet residential neighborhood, nights are especially peaceful. A breeze flows from the south-facing windows through to the east-facing ones, and you may hear Japanese bush warblers from the nearby hill. About 20 minutes via the Aqua-Line from Umihotaru—close to central Tokyo, yet time feels different here.On your way home, someone will likely say: “I could live here.” This is an Accommodation limited to just one group per day—leaving you with that lingering feeling long after your stay.

A glamping facility renovated from a closed-down elementary school. This unique space, filled with a sense of nostalgia, might bring you closer to your loved ones. We look forward to welcoming you in Kisarazu, just a short trip from the city center.