| Happy | |
| Type: | single |
| Artist: | Bump of Chicken |
| Album: | Cosmonaut (album) |
| Genre: | Rock |
| Label: | Toy's Factory TFCC-89300 |
| Prev Title: | R.I.P./Merry Christmas |
| Prev Year: | 2009 |
| Next Title: | Mahō no Ryōri (Kimi kara Kimi e) |
| Next Year: | 2010 |
"Happy" is the sixteenth single by Bump of Chicken, released on April 14, 2010. It peaked at number-one on the Oricon weekly charts and Japan Hot 100.
| Chart | Peak position | |
|---|---|---|
| Japan Hot 100 | 1 | |
| Oricon Daily Charts | 1 | |
| Oricon Weekly Charts | 1 | |
| Oricon Monthly Charts | 1 | |
| 2010 Oricon Top 100 Singles | 36 |