| As for One Day | |
| Cover: | 18 - AS FOR ONE DAY.jpg |
| Type: | single |
| Artist: | Morning Musume |
| Album: | Best! Morning Musume 2 |
| Released: | (Japan) |
| Recorded: | 2003 |
| Genre: | J-pop |
| Length: | 12:54 |
| Label: | Zetima EPCE-5208 (CD single) EPBE-5066 (Single V DVD) EPVE-5066 (Single V VHS) |
| Producer: | Tsunku |
| Prev Title: | Morning Musume no Hyokkori Hyōtanjima |
| Prev Year: | 2003 |
| Next Title: | Shabondama |
| Next Year: | 2003 |
"As for One Day" (Azu fō Wan Dei) is the eighteenth single of J-pop idol group Morning Musume and was released April 23, 2003. It sold a total of 129,893 copies. This single also marked the graduation of second generation member Kei Yasuda. This was the last single to hit #1 until 2006's "Aruiteru". The first pressing comes with a sticker.