Experience an extraordinary space surrounded by water. We have placed large bathing facilities on the highest floor so that the water blends in with the cityscape. This extraordinary space has been designed to let you relax while experiencing the heart of the city. The men’s bath facilities offer views of Shinjuku and Roppongi. The women’s bath facilities are bright and offer a more private atmosphere.

"The Kashiwa-no-ha Onsen" Supplied by an abundant flow of hot water from beneath the premises, this is the only pure-source, natural hot spring bath in a Mitsui Garden Hotel. The waters of the hot spring are rich in mineral salts, and have positive effects on alleviating fatigue, promoting health, improving poor circulation, etc. Settle back into a relaxing moment.

On the seventh floor of the hotel, a public bath with a view overlooking Tokyo Bay awaits. We recommend a morning bath gazing out over the blue sea and green parks. Stretch your legs and relax. Our baths are divided into three different temperature zones ranging from hot to lukewarm, so guests with children need not worry.

The sixteenth floor is the spa floor, where you'll forget about the busy city below. The public bath includes an open-air bath complete with a miniature garden, delivering a mature and relaxed atmosphere. It will refresh your body and mind along with our man-made carbonated spring spa.

On the tenth floor, you'll find Japanese cypress bathtubs where you can rest, relax, and stretch while gazing upon the miniature garden. The gardens are curated to express certain local historical and cultural themes. Kibi is themed around the forest village of the folk tale of Momotaro, while Koraku is meant to evoke the stone groupings of the Okayama Korakuen. The garden's greenery and Japanese atmosphere will help to ease your body and mind.