| Koi ni Koishite | |
| Cover: | KoiniKoishite.jpg |
| Caption: | Standard edition/digital download cover |
| Type: | single |
| Artist: | Mai Kuraki |
| Genre: | J-pop |
| Label: | Northern Music |
| Producer: | Mai Kuraki, KANNONJI |
| Prev Title: | Strong Heart |
| Prev Year: | 2011 |
| Title2: | Special Morning Day to You |
| Next Title: | Try Again |
| Next Year: | 2013 |
is a song by Japanese singer songwriter Mai Kuraki, taken from her fourth compilation album (2014). It was released on August 15, 2012, and served as the song to the Japanese animation Case Closed. It was released as a double-A side with "Special Morning Day to You".
A short version of the official music video was first released on Kuraki's official YouTube account on August 3, 2012. As of February 2018, it has received over 765,000 views on YouTube.
| Chart (2012) | Peak position | |
|---|---|---|
| Japan (Oricon) | 7 | |
| Japan (Japan Hot 100) | 13 | |
| Japan (Japan Hot Animation) | 2 | |
| Taiwan (GMusic Asian Pop Chart) | 7 |
|-! scope="row"| Japan (RIAJ)| | 21,970 |-|}
| Region | Date | Format | Label |
|---|---|---|---|
| Japan | August 27, 2014 | CD single (Standard edition) | Northern Music |
| CD single/DVD (Limited edition) | |||
| CD single (Musing & edition) | |||
| Digital download |