Running for over 50 years, the Lake Towada Sky Lantern Festival sees approximately 2000 lanterns illuminating the summer night sky in Aomori. The LED-powered sky lanterns are priced at 3000 yen each, which covers admission to the event for two people. Along with the beautiful lanterns reflecting off the lake's surface, there will also be a fireworks show towards the end of each evening -- so be sure to stick around!
For those who would like a unique vantage point to appreciate the lanterns and fireworks, there will be boat cruises out on the lake during the event. The cruises are 50 minutes in duration, and are priced at 2,000 yen for adults, and 1,000 yen for elementary school-aged students.
https://kosuimaturi.com/ has more information about the options available.