Owari Tsushima Tenno Festival (尾張津島天王祭)
Time: Late July
Prefecture: Aichi
Location: Tennogawa Park, Tsushima

For over 500 years, on every scorching summer evening, the residents of Tsushima in Aichi Prefecture gather along the Tenno River. It's not necessarily cooler by the riverside on the fourth Saturday of July, but that's when the Tsushima Tenno Festival unfolds, one of the three major river festivals in Japan and nationally renowned. The Tenno Festival, believed to have been a favorite of the local warlord Oda Nobunaga, holds the status of a Nationally Intangible Folk Cultural Asset today.