Isake Camaibau Katonibau (born 27 May 1983) is a Fijian former rugby union international.
Katonibau was born in Suva and educated at Marist Brothers High School.
In 2012, Katonibau was capped three times for the Flying Fijians in the Pacific Nations Cup. He made his appearances as a centre and scored a try on debut in a win over Japan in Nagoya.
Katonibau is a former captain of the Fiji rugby sevens team and was a member of the side that won the 2015 Hong Kong Sevens tournament. He was a forward in rugby sevens.
Injury problems caused Katonibau to be withdrawn from the sevens squad for the 2016 Summer Olympics and an assault charge in 2018, for allegedly striking a police officer, caused further interruptions to his career.