| Osaka Obachan Rock/Osaka Romanesque | |
| Cover: | K8-osakaobachanrock-4thsing.jpg |
| Caption: | Cover |
| Type: | single |
| Artist: | Kanjani8 |
| Album: | KJ1 F.T.O KJ2 Zukkoke Dai Dassō |
| Released: | June 7, 2006 |
| Genre: | Pop |
| Length: | 24:43 |
| Label: | Teichiku Records |
| Prev Title: | Sukiyanen, Osaka/Oh! Enka/Mugendai |
| Prev Year: | 2005 |
| Next Title: | Kan Fu Fighting |
| Next Year: | 2006 |
is the fourth single released by the Japanese boyband Kanjani Eight. The double-A side single features two songs that are on two separate albums. Osaka Obachan Rock is featured on their second album, KJ2 Zukkoke Dai Dassō while Osaka Romanesque originally appeared on KJ1 F.T.O. The difference is that the single version has a 24-second lead.
The limited edition of the single came with a mini poster while the regular edition featured a seven-page booklet.
| Week | Oricon Weekly | Peak Position | Sales Total | |
|---|---|---|---|---|
| June 11, 2006 | June Week 3 | 2 | 170,257 | |
| June 18, 2006 | June Week 4 | 15 | 13,022 | |
| June 25, 2006 | July Week 1 | 29 | 5,284 |