A fireworks festival held in Ena Gorge Park. The contrast of fireworks launched one after another from three floating platforms on the Lake Oi Dam is truly spectacular. About 2,000 fireworks echo with powerful sounds throughout the gorge. The particularly impressive "starmine" is a must-see, and the underwater fireworks thrown from the platforms and reflected on the lake surface are also fantastic. Ena Gorge is a lush artificial lake formed by damming the Kiso River with the Oi Dam. There are plazas and walking paths as well, making it a place full of activities to enjoy even during the day.