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' 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 written by Mika Nakashima & Lori Fine, all music composed by Lori Fine, arranged by Coldfeet.

CD
No.	Title	Length
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

External links

Mika Nakashima

Studio albums

True
Love
Music
Yes
Voice
Star
Real

Compilations

Best
No More Rules

Nana albums

The End

EPs

Resistance
Oborozukiyo: Inori

Singles

True singles	"Stars" "Crescent Moon" "One Survive" "Helpless Rain" "Will"

Love singles	"Aishiteru" "Love Addict" "Seppun" "Find the Way" "Yuki no Hana"

Music singles	"Seven" "Hi no Tori" "Legend" "Sakurairo Mau Koro" "Hitori"

Yes singles	"Cry No More" "All Hands Together" "My Sugar Cat" "Mienai Hoshi" "Sunao na Mama"

Voice singles	"Life" "Eien no Uta" "Sakura: Hanagasumi" "I Don't Know" "Orion"

Star singles	"Over Load" "Candy Girl" "Nagareboshi" "Always" "Ichiban Kirei na Watashi o"

Real singles	"Dear" "Love Is Ecstasy" "Ashita Sekai ga Owaru Nara" "Hatsukoi"

Nana singles	"Glamorous Sky" "Hitoiro"

Discography

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