Onogawa Onsen Firefly Festival   Enjoy the magical scene of fireflies lighting up the onsen town!   Festival Period: Sat. 22nd June – Mon. 15th July   Firefly viewing period Mid June – Mid July Between 20:00 – 21:00   Festival Events: Sat. 6th July – 7th (Both Days 18:00 – 21:00) Location: Onogawa Onsen Village *During the festival The Open-air Onsen Bath‘Komachi no Yu’is available to enter until 20:30