The band formed in December 2009, and was made up of students from Kwansei Gakuin University's music club in Nishinomiya.
[2] Seiya Yamasaki and Kazuma Okazawa were originally from a band called Self Borraginol (セルフボラギノール, Serufu Boraginōru), which formed at Kwansei Gakuin University and was active in 2008 and 2009.
The name is a reference to the Japanese proverb Kyūso neko o kamu (窮鼠 猫を噛む, "A cornered rat will bite a cat").
In March 2012, the band released their first album Jūdai de Dashitakatta, followed by Daiji na Oshirase in December.
[6] On April 1, 2014, it was announced that Kyuso Nekokami signed with major label Victor Entertainment, where they released Change the World in June.