Ooiwa was a good-natured twenty-three year old Engineering researcher at the Kyushu branch of the Japan Block of EAGLE. While thorough in mechanics and mathematics, he had a very hard time solving simple word puzzles and riddles. Being a Judo Champion, Ooiwa was very strong and tough--the strongest of the team. He had a voracious appetite and often ordered big portions of everything especially curry rice, which was his favorite. He was said to have ten siblings. As Ki Ranger, he was armed with the Yellow Sticker, which was a fighting pole whose head can be outfitted with various attachments such as a punching fist. He also utilized the YTC radio which could jam electronic circuitry. He rode in the sidecar of the Blue Machine and the Blue Star. He also copiloted the Varibloom and Varidreen sky vehicles. Ooiwa was later promoted to Chief of the Kyushu EAGLE branch in Episode 55. Daigoro Kumano was recruited from among EAGLE's other trainees to fill his position. Kumano however died in battle while battling a Kuro Jujigun operative. Ooiwa soon returned to active duty again with the Goranger team in Episode 67. [The actor Baku Hatakeyama a.k.a. Jirou Maekawa passed away sometime before 1987.]