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

Music Festival Master / Editor-in-ChiefKeisuke Hane
Editor-in-chief of RAG MUSIC and in charge of music festivals. When I attended my first music festival as a freshman in college, I was captivated by its charm—“I can’t believe there’s a place this free and this fun.” I share information about wonderful music festivals every day to help grow the community of festival fans.

During the summer break from July to August, we’ve compiled a list of music festivals—such as summer festivals and rock festivals—held in eastern Japan (Kanto, Hokkaido, Tohoku, Hokuriku, and Koshinetsu).

Check out the festivals that catch your eye and make this summer vacation 100 times more fun!

Past events

ATSUGI Hi! Thunder Rock FestivalMon, Aug 11 – Kanagawa Prefecture

atsugi-bunka.jp

Schedule	Monday, August 11, 2025
place	Kanagawa Prefecture, Atsugi City, Atsugi City Cultural Hall, Main Hall
Website	https://atsugi-bunka.jp/topics/2025/001501/
SNS

Otaru Teppen Music FestivalMonday, 8/11, Hokkaido

http://www.gutabi.jp

Schedule	Monday, August 11, 2025
place	Hokkaido, Otaru City, Tenguyama 2 / Summit Family Slope
Website	https://www.gutabi.jp/event/detail/2592

Kotobuki-cho Free ConcertWed, Aug 13 — Kanagawa Prefecture

kotobukifree.jimdofree.com

Schedule	Wednesday, August 13, 2025
place	Kanagawa Prefecture, Yokohama City, Kotobuki-cho Health and Welfare Exchange Center Plaza
Website	https://kotobukifree.jimdofree.com/
SNS

Shima Dream Jazz in SadoThu, Aug 14 – Niigata Prefecture

http://www.shimayume.jp

Schedule	Thursday, August 14, 2025
place	354 Ryotsu-minato, Sado-shi, Niigata, Japan
Website	https://www.shimayume.jp/
SNS

View details

Kiyotsu River Riverside Music FestivalThu, Aug 14 – Niigata Prefecture

http://www.tokamachishikankou.jp

Schedule	Thursday, August 14, 2025
place	Kiyotsu River Fresh Park, Tokamachi City, Niigata Prefecture
Website	https://www.tokamachishikankou.jp/event/kawapperi_ongakusai/

View details

SONICMANIAFriday, Aug 15 — Chiba Prefecture

Sonicmania is an all-night event held the night before the main Summer Sonic each year as a pre-festival. However, its momentum has grown into something far beyond a mere pre-party. With a lineup that fuses rock and dance, it offers new experiences to each community.