| Friend/Sugao no mama | |
| Cover: | RinaAiuchiFriend.jpg |
| Caption: | Standard edition B/Digital download cover |
| Type: | single |
| Artist: | Rina Aiuchi |
| Album: | Thanx |
| Length: | |
| Label: | Giza Studio |
| Prev Title: | I Believe You ~Ai no Hana~ |
| Prev Year: | 2008 |
| Next Title: | Ai no Kotoba |
| Next Year: | 2009 |
is a single by Japanese singer-songwriter Rina Aiuchi. It was released on 17 December 2008 through Giza Studio, as the second single from her seventh studio album Thanx. The double A-side single reached number eight in Japan and has sold over 12,383 copies nationwide.[1] "Friend" served as the theme song for the Japanese television show Ongaku Senshi ~Music Fighter~.
|-! scope="row"| Japan (RIAJ)| | 12,383 |-|}
| Region | Date | Format | Catalogue Num. | Label | Ref. |
|---|---|---|---|---|---|
| Japan | 29 March 2006 | CD+DVD | GZCA-7134 | Giza Studio | [2] |
| CD | GZCA-4117 | [3] | |||
| CD | GZCA-4118 | [4] | |||
| Digital download | [5] | ||||