Kujira (くじら; Whale), also known as WhaleDontSleep, is a Japanese singer, lyricist, composer, arranger and vocaloid P. He started his activities on April 1, 2019. He does all the songwriting, composition and arrangement by himself, and has been actively releasing music using VOCALOID, vocal feat. works by yama, Ado, and others, as well as providing music to the world. He started releasing songs sung by himself with "Warumono" in 2021. His first