| Ai no Kisetsu | |
| Cover: | ainokisetsu.jpg |
| Type: | single |
| Artist: | Angela Aki |
| Album: | Life |
| Released: | September 16, 2009 (Japan) |
| Genre: | J-pop |
| Length: | 12:08 |
| Label: | Sony Music Japan |
| Prev Title: | Tegami (Haikei Jūgo no Kimi e) |
| Prev Year: | 2008 |
| Next Title: | Kagayaku Hito |
| Next Year: | 2010 |
"" is the ninth single by Japanese singer Angela Aki and was released on September 16, 2009, one year after her previous single's release. The single contains the song "It's So Hard to Say Goodbye to Yesterday", which is a cover of song by American singer G. C. Cameron by the same title. "Ai no Kisetsu" was used as a theme song for NHK drama, Tsubasa.
| Release | Oricon Albums Chart | Peak Position | Debut Sales (copies) | Sales Total (copies) | Chart Run | |
|---|---|---|---|---|---|---|
| September 16, 2009 | Daily Chart (first day) |
| align="center" | - | 16.651* | 5 weeks |
| Weekly Chart |
| 9,571 | ||||
| Monthly Chart (September) |
| 13,278 |