Metamerism (メタメリズム)

"Metamerism (メタメリズム)" is a song by Kanae Itou that serves as the first ending theme for the 2010 television anime Shinryaku! Ika Musume (侵略!イカ娘, The Squid Girl), produced by Diomedéa. It was released by Lantis on November 26, 2010 as Itou's fourth single.

Aki Hata wrote the lyrics, Hiroshi Takaki composed the music, and Kaoru Okubo arranged the song. The single reached No. 20 on Oricon's weekly singles chart and remained there for seven weeks, and the title track later appeared on Itou's 2011 album ラズベリー (Raspberry).