Encounter the endless sea of hydrangeas.

During the blooming season, the garden is covered with hydrangeas of various colors such as blue, purple, white, and pink. The romantic night illumination is also a must-see. The hidden gem of the Hydrangea Festival is the Firefly Village in Katahara Onsen, where you might be lucky enough to witness the magical sight of Genji fireflies dancing among the hydrangeas! Besides flower viewing, the hot spring experience at Katahara Onsen, known as 'Beauty Bath,' is a must-try. Many Japanese people recommend staying for a night at a traditional Japanese hot spring inn after enjoying the flowers.