I Don't Know (Mika Nakashima song)

"I Don't Know" is Mika Nakashima's 26th single, released on July 23, 2008. It is a collaboration with owarai group Morisanchuu (森三中), released under the name Mica 3 Chu (Mikasanchuu), and is her first single to be released as a CD+DVD format in addition to the regular CD only format.

"I Don't Know"
Single by Mika Nakashima
from the album Voice
A-side"I Don't Know"
B-side"Shut Up"
ReleasedJuly 23, 2008
GenreJ-pop
LabelSony
Songwriter(s)Mika Nakashima & Lori Fine
Mika Nakashima singles chronology
"Sakura: Hanagasumi"
(2008)
"I Don't Know"
(2008)
"Orion"
(2008)

'I Don't Know' is Mika's first English-language single. 'I Don't Know' and its B-side, 'Shut Up,' are sung entirely in English.

Track listing

All lyrics are written by Mika Nakashima & Lori Fine; all music is composed by Lori Fine, arranged by Coldfeet.

CD
No.TitleLength
1."I Don't Know" 
2."Shut Up" 
3."I Don't Know" (Instrumental) 
4."Shut Up" (Instrumental) 

Charts

Oricon sales chart (Japan)

Release Chart Peak Position Sales Total Chart Run
July 23, 2008 Oricon Daily Singles Chart 6 17,708 5 weeks
Oricon Weekly Singles Chart 11
Oricon Monthly Singles Chart
Oricon Yearly Singles Chart 392
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