| Koi no Doutei | |
| Cover: | Koi no Doutei Cover.png |
| Type: | single |
| Artist: | Kanon x Kanon |
| B-Side: | 'Renai no Susume' |
| Released: | June 28, 2011 |
| Recorded: | 2011 |
| Genre: | Synthpop |
| Length: | 19:00 |
| Label: | Sony Music Japan |
| Producer: | Kanon (An Cafe) |
| Chronology: | Kanon Wakeshima |
| Prev Title: | Calendula Requiem |
| Prev Year: | 2010 |
| Next Title: | Halloween Party |
| Next Year: | 2012 |
is the second single from singer and cellist Kanon Wakeshima and An Cafe bassist Kanon's duo group Kanon x Kanon, and Wakeshima's fourth overall single.[1] The song was used as the opening song for the anime adaption of 30-sai no Hoken Taiiku.