ONSEN
群馬県
Kusatsu Onsen
草津温泉
Hot Spring
# Kusatsu Onsen
What strikes you first is not the sight but the volume — more than 32,300 liters per minute, rising ceaselessly from the earth. Kusatsu, in Gunma Prefecture, sits at roughly 1,100 meters above sea level, and the sheer quantity of water pouring from its sources is unmatched anywhere in Japan. The town has known this about itself for a long time. It held the highest rank in the old onsen rankings, the eastern ōzeki, and was counted among the "three great springs" as far back as the Muromachi period. Warlords and monks passed through — Uesugi Kenshin, Takeda Shingen, the monk Rennyo — their names layered into the place like sediment.
At the center of town lies the Yubatake, one of the main source pools, where hot water cascades over wooden chutes in the open air. The smell of sulfur is constant, almost architectural, and the water is sharply acidic — the product of volcanic gases meeting groundwater far below. There is a local saying that these waters cure everything except lovesickness. A newer source, the Bandai-kō, has been in use only since 1975, its temperatures so fierce they require radiator cooling before the water can reach a bath. The old and the modern run in parallel here, both fed by the same restless geology.
To stay several nights in Kusatsu is to feel, rather gradually, the rhythms of a town organized around its water. The yumomi tradition — the communal stirring of hot water with long wooden paddles to bring the temperature down — is not performance so much as inheritance, a way the town has always negotiated with what rises from below. You begin to sense that the water is not a feature of the place but its organizing principle, the thing around which everything else has arranged itself, quietly, for centuries.
What strikes you first is not the sight but the volume — more than 32,300 liters per minute, rising ceaselessly from the earth. Kusatsu, in Gunma Prefecture, sits at roughly 1,100 meters above sea level, and the sheer quantity of water pouring from its sources is unmatched anywhere in Japan. The town has known this about itself for a long time. It held the highest rank in the old onsen rankings, the eastern ōzeki, and was counted among the "three great springs" as far back as the Muromachi period. Warlords and monks passed through — Uesugi Kenshin, Takeda Shingen, the monk Rennyo — their names layered into the place like sediment.
At the center of town lies the Yubatake, one of the main source pools, where hot water cascades over wooden chutes in the open air. The smell of sulfur is constant, almost architectural, and the water is sharply acidic — the product of volcanic gases meeting groundwater far below. There is a local saying that these waters cure everything except lovesickness. A newer source, the Bandai-kō, has been in use only since 1975, its temperatures so fierce they require radiator cooling before the water can reach a bath. The old and the modern run in parallel here, both fed by the same restless geology.
To stay several nights in Kusatsu is to feel, rather gradually, the rhythms of a town organized around its water. The yumomi tradition — the communal stirring of hot water with long wooden paddles to bring the temperature down — is not performance so much as inheritance, a way the town has always negotiated with what rises from below. You begin to sense that the water is not a feature of the place but its organizing principle, the thing around which everything else has arranged itself, quietly, for centuries.