| Wahaha | |
| Cover: | K8-wahaha-8thsingle.jpg |
| Caption: | Regular Edition Cover |
| Type: | single |
| Artist: | Kanjani8 |
| Album: | Puzzle |
| Released: | March 12, 2008 |
| Genre: | J-pop |
| Length: | 18:56 |
| Label: | Imperial Records |
| Prev Title: | It's My Soul |
| Prev Year: | 2007 |
| Next Title: | Musekinin Hero |
| Next Year: | 2008 |
is the eighth single released by the Japanese boyband Kanjani8. The single featured two versions, a limited and regular edition. The limited edition single came with a seven-page photobook.
Because this single was the eighth one that they released, they played on the pronunciation of the number 8, hachi, with the pronunciation of the Japanese word for bee, also hachi, and used it for hidden gag in the CD's promotion and jacket art. Shota Yasuda dressed up like a bee and was featured in the promotional video and limited edition CD booklet.
| Week | Oricon Weekly | Peak position | Sales total | |
|---|---|---|---|---|
| March 24, 2008 | March Week 4 | 1 | 194,304[1] | |
| March 31, 2008 | March Week 5 | 8 | 14,745[2] | |
| April 7, 2008 | April Week 1 | 14 | 6,974[3] |