Isao Okano is a retired judoka who competed in the middleweight division (‍–‍80 kg) in the 1964 Summer Olympics.

The judo competition at the 1964 Summer Olympics was the first time the sport was included in the Summer Olympic Games. As a result, decades of judo being banned in the Soviet Union ended shortly before in order to gain medals. They were awarded in 4 classes, and competition was restricted to men only. The competition was held in the Nippon Budokan, which was built to host the competition.