"Oishii Kisetsu" is one of the two songs that made up the fourth single by Japanese entertainer Chiaki Kuriyama, along with "Ketteiteki Sanpunkan". They were released on March 2, 2011, as the lead singles from her debut album Circus, released two weeks later. Both songs were produced by musician Ringo Sheena.

Chiaki Kuriyama is a Japanese actress, singer, and model. She is best known in the West for her roles as Takako Chigusa in Kinji Fukasaku's 2000 film Battle Royale and Gogo Yubari in Quentin Tarantino's 2003 film Kill Bill: Volume 1.