Planetarium (Ai Otsuka song)

"Planetarium"
Single by Ai Otsuka
from the album Love Cook
ReleasedSeptember 21, 2005 (2005-09-21)
Recorded2005
GenrePop
Labelavex trax
AVCD-30768/B (Japan, CD+DVD)
AVCD-30769 (Japan, CD)
Ai Otsuka singles chronology
"Neko ni Fūsen"
(2005)
"Planetarium"
(2005)
"Frienger"
(2006)

"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.[1] 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."[2]

"Planetarium" was featured on Ai Otsuka's studio-album Love Cook. It was also used as an OST for the Japanese drama Hana Yori Dango.