Planetarium (song)

"プラネタリウム" "puranetariumu" / "Planetarium"
Single by Ai Otsuka
from the album Love Cook
Released	September 21, 2005 (2005-09-21)
Format	CD, CD + DVD
Recorded	2005
Genre	Pop
Label	avex trax AVCD-30768/B (Japan, CD+DVD) AVCD-30769 (Japan, CD)
Ai Otsuka singles chronology
"Neko ni Fūsen" (2005) "Planetarium" (2005) "Frienger" (2006)
Alternative cover CD + DVD Cover

"Planetarium" (プラネタリウム Puranetariumu) is Ai Otsuka's tenth single, which was released on 21 September 2005. The single had great success and became Otsuka's second #1 hit on the Oricon charts, selling 316,425 copies. In 2005, Planetarium sold 215,114 copies, making it the #41 best-selling single of the year. However, it still charted into the next year and was the #99 best-selling single in 2006, selling 100,555 copies. Planetarium is her second best-selling single after "Sakuranbo."

"Planetarium" was also used as an OST for the Japanese drama "Hana Yori Dango".

In the iTunes Japan Store, Planetarium was the 12th most downloaded song in 2006.^{[citation needed]}

Track listing

All songs written and composed by Ai Otsuka. 

CD
No.	Title	Arranger(s)	Length
1.	"Planetarium"	Ai×Ikoman	5:10
2.	"Drop."	Ai×Ikoman	4:28
3.	"Planetarium" (Instrumental)	Ai×Ikoman	5:08
4.	"Drop." (Instrumental)	Ai×Ikoman	4:25
Total length:			19:11

DVD
No.	Title	Director(s)	Length
1.	"Planetarium" (Music video)

Trivia

Planetarium was also used as the insert song in the first season of the live action Japanese version of Hana Yori Dango (Boys over Flowers).