Sega has launched Project ONSOKU, a new initiative that pairs Hatsune Miku with Sonic the Hedgehog in fresh collaboration songs. The first track, Sai Love Jinsei Runner, is by Kairiki bear, who also created the album art for the song. Nou contributed to the visuals, featuring both Miku and Sonic in the illustration.
A new trailer published by Sega outlines the project’s rollout: following the grand reveal on August 28, 2025, Sega will release a new song each week. The Japanese press release provides the following schedule:
– September 1, 2025 — We Are Picopico Hammers!!!! by Cosmo@Bousou-P
– September 8, 2025 — Jet Black by Yunosuke
– September 15, 2025 — Treasure Garden by Ponchi
– September 22, 2025 — Denkou Sekka by Camellia
Sega has long collaborated with Crypton Future Media to publish Hatsune Miku rhythm games, including Project Diva and Project Sekai: Colorful Stage. At Summer Game Fest 2025, the company also announced that Miku will be a guest character in Sonic Racing: CrossWorlds.
Sonic Racing: CrossWorlds is scheduled for worldwide release on September 25, 2025, across PS5, PS4, Xbox Series X, Xbox One, Switch, and PC, with a Switch 2 edition planned as well. The new Hatsune Miku Project ONSOKU songs will be added to the racing title, expanding the crossover between rhythm game culture and high-speed arcade racing.
Context and outlook
– This initiative continues Sega’s tradition of cross-media collaborations that blend music and gaming, building on past Hatsune Miku partnerships.
– The weekly song rollout keeps fans engaged over a month, creating ongoing anticipation for both the music releases and Miku’s cameo in Sonic Racing: CrossWorlds.
– For players, the integration promises fresh content across platforms, potentially broadening the audience for both Hatsune Miku and Sonic properties.
Summary
Sega’s Project ONSOKU marks an energetic collaboration between Hatsune Miku and Sonic the Hedgehog, kicking off with Sai Love Jinsei Runner and rolling out a weekly slate of new tracks through September. The partnership ties into the forthcoming Sonic Racing: CrossWorlds, where Miku will appear as a guest character, with the game launching on multiple platforms including a Switch 2 edition. This move reinforces Sega’s history of cross-brand musical partnerships and offers fans a fresh, multidimensional experience across music and racing genres.