Ogaki's biggest festival held on the weekend on or before May 15 has 13 ornate floats called "yama." They are paraded along the streets in central Ogaki. The road leading to Hachiman Shrine is lined with food stalls.

There are different types of floats. Mostly karakuri doll floats, but also two floats with a stage for traditional Japanese dances by young kids. The floats were inspired by karakuri floats in Aichi Prefecture and kabuki floats in Nagahama, Shiga Prefecture.