Summer Sonic (サマーソニック)
Time: Mid Aug
Prefecture: Osaka
Location: Ookini Arena Maishima

The Summer Sonic Festival is a yearly music event that takes place over a single weekend in August, concurrently in Chiba and Osaka, Japan. The festival showcases a unified lineup performing on one day in Osaka, followed by a performance the next day in Chiba, and vice versa.