| ココロの跡 Kokoro no Ato | |
| Cover: | kokoronoatokosaka.jpg |
| Type: | single |
| Artist: | Riyu Kosaka |
| Album: | Every Struggle |
| Released: | December 12, 2007 |
| Genre: | J-pop |
| Label: | avex entertainment |
| Prev Title: | Platinum Smile |
| Prev Year: | 2007 |
"Kokoro no Ato" (ココロの跡 Heart's Mark or Heart's Scar) is Riyu Kosaka's fifth single with Avex and her sixth single overall. It was released on December 12, 2007. Unlike her previous singles with Avex, this single did not ship with a CD+DVD edition. The title track is featured as the intro theme to the anime Mokke.