| Sono Speed De | |
| Type: | single |
| Artist: | the Brilliant Green |
| Album: | Terra 2001 |
| B-Side: | "Rock'n Roll" (Live at Shibuya Club Quattro) |
| Released: | (reissue) |
| Recorded: | 1999 |
| Genre: | J-pop |
| Length: | 14:26 |
| Label: | Sony Music Records Defstar Records (reissue) |
| Producer: | Shunsaku Okuda |
| Prev Title: | Tsumetai Hana |
| Prev Year: | 1998 |
| Next Title: | Nagai Tameiki no Youni |
| Next Year: | 1999 |
"Sono Speed De" (Japanese: そのスピードで||At Light Speed) is the Brilliant Green's fifth single, released on January 27, 1999, by Sony Music Records, and reissued on October 1, 2000, by Defstar Records.[1] It peaked at #1 on the Oricon Singles Chart,[2] and was the band's third #1 single. It was the opening theme song for Fuji Television's 1999 TV drama Over Time.[3]
The song also appears on the band's compilation albums, Complete Single Collection '97–'08 (2008) and The Swingin' Sixties (2014).