Gokuraku Tombo (極楽とんぼ, Gokuraku Tonbo), meaning Heavenly Dragonfly, was a manzai comedy duo consisting of Keiichi Yamamoto (山本 圭壱, Yamamoto Keiichi) and Koji Kato (加藤 浩次, Katō Kōji). Members of the Yoshimoto Kogyo entertainment conglomerate, they performed on the Fuji TV variety show Mecha-Mecha Iketeru! Their main act was based on arguing and fighting in public.
Source: “Kōji Katō”, English Wikipedia (CC BY-SA 4.0), excerpt