A station-front designer sento where you can enjoy free-flowing kuroyu and a cold plunge bath made with unprocessed natural spring water
Tokyo Ota City
COCOFURO Masunoyu is a designer sento located right in front of Kugahara Station in Ota City, Tokyo. Its biggest draw is the luxurious bath where you can enjoy Ota Ward's famous kuroyu as free-flowing natural hot spring water straight from the source. In addition, the cold plunge bath, made in a tsubo-buro style and using the unprocessed natural spring water as is, with no heating or dilution, offers an exceptionally smooth feel and the ultimate cool-down experience. The sauna is available with the regular sento admission fee only. This bona sauna, with its heater installed beneath the bench, warms you thoroughly from the feet up. The modern, spotlessly clean space also includes a manga corner and draft beer, making it ideal for relieving the fatigue of everyday life.
TypeNatural Hot Spring
Amber-colored kuroyu, a specialty of Ota City, is offered as free-flowing natural hot spring water straight from the source. The mineral components unique to moor springs help leave the skin smooth. In a bath where fresh water is constantly flowing in, you can fully savor the blessings of a natural hot spring.
Sauna TypeDry Sauna
Stove TypeBuilt-in Stove
Capacity6people
A bona sauna with its heater installed beneath the bench. It is characterized by a gentle warmth that rises from the feet up, enveloping the entire room in evenly distributed heat. Another plus is that it is available with the sento admission fee alone, and you can calmly work up a sweat while surrounded by the scent of wood.
Water QualityHot Spring Water
Capacity1people
An amber-colored kuroyu cold plunge bath made with unprocessed natural spring water, with absolutely no dilution or heating. This luxurious one-person tsubo-buro lets you enjoy fresh spring water all to yourself. With its smooth feel, it gently cools down the body after the sauna.
Closed Days: None
1F Maison Kugahara, 2-1-23 Minamikugahara, Ota City, Tokyo 146-0084
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
A station-front designer sento where you can enjoy free-flowing kuroyu and a cold plunge bath made with unprocessed natural spring water
Tokyo Ota City
COCOFURO Masunoyu is a designer sento located right in front of Kugahara Station in Ota City, Tokyo. Its biggest draw is the luxurious bath where you can enjoy Ota Ward's famous kuroyu as free-flowing natural hot spring water straight from the source. In addition, the cold plunge bath, made in a tsubo-buro style and using the unprocessed natural spring water as is, with no heating or dilution, offers an exceptionally smooth feel and the ultimate cool-down experience. The sauna is available with the regular sento admission fee only. This bona sauna, with its heater installed beneath the bench, warms you thoroughly from the feet up. The modern, spotlessly clean space also includes a manga corner and draft beer, making it ideal for relieving the fatigue of everyday life.
TypeNatural Hot Spring
Amber-colored kuroyu, a specialty of Ota City, is offered as free-flowing natural hot spring water straight from the source. The mineral components unique to moor springs help leave the skin smooth. In a bath where fresh water is constantly flowing in, you can fully savor the blessings of a natural hot spring.
Sauna TypeDry Sauna
Stove TypeBuilt-in Stove
Capacity6people
A bona sauna with its heater installed beneath the bench. It is characterized by a gentle warmth that rises from the feet up, enveloping the entire room in evenly distributed heat. Another plus is that it is available with the sento admission fee alone, and you can calmly work up a sweat while surrounded by the scent of wood.
Water QualityHot Spring Water
Capacity1people
An amber-colored kuroyu cold plunge bath made with unprocessed natural spring water, with absolutely no dilution or heating. This luxurious one-person tsubo-buro lets you enjoy fresh spring water all to yourself. With its smooth feel, it gently cools down the body after the sauna.
Closed Days: None
1F Maison Kugahara, 2-1-23 Minamikugahara, Ota City, Tokyo 146-0084
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more