| Quincy / Kono Yo no Shirushi | |
| Cover: | QuincyKonoYoNoShirushiBoA.jpg |
| Type: | single |
| Artist: | BoA |
| Album: | Best of Soul |
| Released: | 1 September 2004 |
| Label: | Avex Trax |
| Prev Title: | Be the One |
| Prev Year: | 2004 |
| Next Title: | Meri Kuri |
| Next Year: | 2004 |
"Quincy / Kono Yo no Shirushi" is BoA's 13th Japanese single. "Kono Yo no Shirushi" is the song featured on Calpis commercial. This single was not included on any of her full studio albums but was on her best selling compilation album Best of Soul, which was also her second highest selling album.
Oricon Sales Chart (Japan)