The Sonic x Hatsune Miku ‘PROJECT ONSOKU’ collab has released its final song

The final song from the special “Project ONSOKU” musical collaboration between Sega’s Sonic the Hedgehog and the virtual singer Hatsune Miku has been officially released.
The new song, “Denkoh-sekka” (“Flash of Lightning”), was written and composed by the acclaimed producer Camellia, and its jacket illustration was created by the artist Kantaro.

“Project ONSOKU” is a major collaboration featuring five original songs from five different Vocaloid producers, released weekly.
The previously released songs in the project are:
- “Saiai Jinsei Runner” by Kairiki Bear (Sonic themed)

- “We Are Picopico Hammers!!!!” by cosMo@Bousou-P (Amy Rose themed)

- “Jet Black” by Yunosuke (Shadow themed)

- “Treasure Garden” by Ponchi♪ (Chao themed)

This new, fifth and final song, “Denkoh-sekka,” is a powerful track that blends the speed of Sonic with the voice of Hatsune Miku.
In a comment, Camellia humorously described himself as an “abnormal entity” who can “exceed the speed of sound” and release “super-high-speed tracks like lasers.”

He praised Hatsune Miku for her ability to “sprint at full speed alongside Sonic the Hedgehog” and expressed his honor in contributing to Sonic’s musical background.

All five of the collaboration songs will be included as in-game background music in the upcoming racing game, Sonic Racing Cross Worlds.

It has also been confirmed that Hatsune Miku is now available as a playable racer in the game.
She has been added as a free DLC update, complete with her own original machine, the “Diva Machina.”

Players who purchase the “Digital Deluxe Edition” of Sonic Racing Cross Worlds can gain early access to the game and all five of the “Project ONSOKU” songs starting from the 22nd of September.

Sonic Racing Cross Worlds is scheduled to be fully released on Thursday, the 25th of September, 2025.
You can watch all of the previously released ‘PROJECT ONSOKU’ videos below:
- “Saiai Jinsei Runner” by Kairiki Bear
- “We Are Picopico Hammers!!!!” by cosMo@Bousou-P
- “Jet Black” by Yunosuke
- “Treasure Garden” by Ponchi♪
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