| ER | |
| Type: | single |
| Artist: | Kanjani Eight |
| Released: | (Japan) |
| Prev Title: | Ai Deshita |
| Prev Year: | 2012 |
| Next Title: | Aoppana |
| Next Year: | 2012 |
"ER" is a single by Japanese boy band Kanjani Eight as Eight Ranger. It was released on July 25, 2012. It debuted in number one on the weekly Oricon Singles Chart[1] and reached number one on the Billboard Japan Hot 100.[2]