Kōsuke Masuda (sometimes Kousuke, Japanese: 増田こうすけ; born June 2, 1976 in Mie Prefecture, Japan) is a gag manga artist and writer most famous for the manga series Gag Manga Biyori.[1] The creator's works are highly influenced by Kyosuke Usuta, the creator of Pyū to Fuku! Jaguar.