List of Eastern Japan summer festivals held during the summer vacation [2026]: rock festivals and outdoor music festivals

The Monbetsu Port Festival is a signature summer celebration of Monbetsu City, Hokkaido, originating from the prewar “Port Festival” and held annually since its first edition in 1955 to give thanks for the benefits brought by the Port of Monbetsu. Over 100 food and game stalls line the area around the former station-front street, and a wide array of events unfolds on the special stage and in the Honcho 4-chome pedestrian zone. The main highlight is the Okhotsk Fireworks Festival, which lights up the Okhotsk night sky. In 2026, it will be held over three days from July 24 to 26.

The Tomakomai Music Festival Project, TOMACON, is a city-sponsored music festival organized by the Lifelong Learning Division of Tomakomai City, Hokkaido. It is held as a concert open to all genres and generations, including registrants of the Artist Bank as well as general cultural groups and individuals. The venue is the stage in front of the fountain at Idemitsu Culture Park—affectionately known as the Citizens’ Cultural Park—and it is held concurrently with the Tomakomai Art Festival. In 2026, it will take place in July.