List of summer festivals in Eastern Japan held during summer vacation [2025–2026]: Rock festivals and outdoor music festivals

The Oga Namahage Rock Festival held in Akita Prefecture was launched to revitalize the region by drawing many visitors to Oga, increasing Oga’s name recognition, and fostering local pride. Artists from a wide range of genres—such as mixture, hardcore, and reggae—come together to create two exhilarating days.

The Monterey Jazz Festival in Noto began in 1989 as a friendship initiative through jazz by the City of Monterey in the United States and the Wakura Onsen Tourism Association of Nanao City. Due to this history, the program features performances by a U.S. all-star jazz orchestra as well as by Japanese junior high school big bands.

It’s the world’s largest idol festival! Launched around the time the term “Idol Warring States Period” began to be heard, this festival draws over 1,000 idols and more than 70,000 attendees every year, making it an unmissable event for idol fans.