| CALLING | |
| Cover: | CallingReg.jpg |
| Type: | single |
| Artist: | FLOW |
| Released: | May 12, 2010 |
| Genre: | Rock |
| Label: | Ki/oon Records |
| Prev Title: | Sign (Flow song) |
| Prev Year: | 2010 |
| Next Title: | Tabidachi Graffiti |
| Next Year: | 2010 |
CALLING is FLOW's nineteenth single. Its A-Side was used as the first ending theme song for Heroman. The single has two editions: regular and limited. The limited edition includes a bonus DVD with extra clips including its music video. It reached #21 on the Oricon charts and charted for 3 weeks. *[1]