Denkoh Sekka (電光刹歌 Denkou Sekka) (loosely translated as "Lighting-speed Anthem of Instance") is a promotional track for Sonic Racing: CrossWorlds, released as the fifth and final song of Project ONSOKU, a collection of five new Hatsune Miku songs and music videos made to celebrate her inclusion in the game. The song is produced by Camellia.