Kusatsu Onsen’s Yubatake: Japan’s Hot Spring Treasure The Yubatake at Kusatsu Onsen, Japan’s largest hot spring source, disgorges an impressive 4,000 liters of thermal water per minute. Its appellation, “Yubatake,” stems from the practice of guiding hot springs through wooden troughs known as “yudoi,” a process that not only cools the water but also extracts … Continue reading [Gunma] Yubatake (草津温泉 湯畑): Kusatsu Onsen’s Liquid Gold Mine