sega surprised his fans with the announcement of project onsoku, a new initiative that combines two of its most iconic franchises and characters: Hatsune Miku, the virtual star of vocaloid music, and Sonic the Hedgehog, the fast blue hedgehog that has been the face of the company for more than three decades. The project is not limited to music only. It will also have an impact on the next racing video game Sonic Racing: Crossworlds, which will arrive this year.
Weekly songs as part of Project Onsoku
The proposal focuses on a series of Original songs created especially for collaboration. The first theme to come to light was “Sai Love Jinsei Runner”, composed of Kairiki Bear, one of the most influential producers within the Vocaloid scene. In addition to the musical composition, the artist was also in charge of making the official cover of the single. To complement the release, the illustration showing Miku and Sonic together was the work of the illustrator nou. Its vibrant and colorful style reflects the energy of both characters.
Sega revealed that Project Onsoku will not be an isolated event. It will take place over several weeks, with Weekly premieres of new songs Until the end of September 2025. With Project Onsoku, each piece of music will feature its own style and a different producer. This guarantees variety and appeal for both fans of Vocaloid music and Sonic fans.
The calendar confirmed by the company is as follows:
- 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
This weekly delivery approach seeks to maintain the interest of the community. It aims to generate expectation and, at the same time, offer a showcase for several recognized producers of the Vocaloid scene.
The link between Sega and Hatsune Miku
The relationship between Sega and Hatsune Miku It’s not new. For more than a decade, the company has collaborated with Crypton Future Media, creator of the virtual singer, in multiple rhythmic video games that became cult phenomena. The serie Project Diva and the most recent Project Sekai: Colorful Stage They are examples. These titles helped consolidate Miku’s image as a cultural icon inside and outside of Japan.
For its part, Sonic has been the official mascot of Sega since 1991. Its career covers platform games, comics, movies and even animated series. The union of both characters represents a mixture between the Nostalgia for the classics of the 90s and the Contemporary popularity of the Vocaloid phenomenon.
In addition to music, Sega confirmed that All Project Onsoku songs will be included within the Sonic Racing: Crossworlds soundtrack, his new racing title. This game will bring together several characters from the Sonic universe and now also special guests.
Project Onsoku also reaches video games
during the Summer Game Fest 2025, held in June, Sega had already anticipated that Hatsune Miku would be one of the playable guest characters in the title. With this announcement, it is clear that Project Onsoku has made its participation broader. Miku will not only be available as a pilot, but will also bring a significant part of the game’s sound experience.
Sonic Racing: Crossworlds will be available worldwide September 25, 2025. The title will reach PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch and PC, with an additional edition confirmed for the next switch 2.
The combination of new songs, classic characters and the active participation of figures such as Hatsune Miku makes Project Onsoku one of Sega’s most ambitious and striking projects in recent years. For the company, it represents the opportunity to keep Sonic current. It also seeks to expand Miku’s international presence. In addition, it reinforces its identity as a company that bets on cultural innovation and the union between video games and music.
