| Koko ni Iruzee! | |
| Cover: | 16_-_Koko_ni_Iru_Ze!.jpg |
| Type: | single |
| Artist: | Morning Musume |
| Album: | No. 5 |
| Released: | October 30, 2002 (JP) |
| Recorded: | 2002 |
| Genre: | J-pop, bubblegum pop, pop rock, ska pop |
| Length: | 13:34 |
| Label: | Zetima |
| Producer: | Tsunku |
| Prev Title: | Do It! Now |
| Prev Year: | 2002 |
| Next Title: | Morning Musume no Hyokkori Hyōtanjima |
| Next Year: | 2003 |
is the sixteenth single of J-pop idol group Morning Musume and was released October 30, 2002 under Zetima Records with the catalog number EPCE-5182.
Aside from Morning Musume, the following personnel also took part in track 1 ("Koko ni Iruzee!") as background vocals.
| Release | Chart | Peak position | Weeks in chart | |
|---|---|---|---|---|
| October 30, 2002 | Oricon Daily Singles Chart[1] |
| – | |
| October 30, 2002 | Oricon Weekly Singles Chart |
| 16 | |
| October 30, 2002 | CDTV Weekly Singles Chart[2] |
| 12 |
Two years after the release of the single, Morning Musume producer Tsunku covered the song along with "" (another Morning Musume song) and is featured in his album Take 1.[3]
| Koko ni Iruzee! | |
| Cover: | Athena's Koko ni Iruzee!.jpg |
| Type: | single |
| Artist: | Athena (Uta: Nozomi Tsuji) |
| B-Side: | Happy My Friend |
| Released: | May 16, 2007 (JP) |
| Recorded: | 2007 |
| Genre: | J-pop |
| Label: | Zetima |
| Producer: | Tsunku |
Former Morning Musume member Nozomi Tsuji released her own rendition of the song on May 16, 2007 as the opening theme of the anime Robby and Kerobby and as her debut single under the same label of the original version. Though the main track is "Koko ni Iruzee!", the coupling track is different and is named "Happy My Friend."