Interesting article; Harada doesn't look 98, he's aged remarkably well. I noticed the Kaiten and Ohka illustrations on the wall behind him in the shot of him speaking.
An excerpt from Japanese Naval Aces and Fighter Units of World War Two by Ihukio Hata and Yasuo Izawa:
"Born in Nagano Prefecture in 1916, Harada graduated from the 35th Pilot Training Class in February 1937. After being posted to the Saeki Air Group, he was next attached to the 12th Air Group in October and advanced to the central China battlefront. There was no opportunity for air combat however, and he was returned to the homeland in January 1938. Harada then served as an instructor in the Saeki, Tsukuba, Hyakurighara and Oita air groups; in September 1941 he was transferred to serve on board the Soryu. During the attack on Pearl Harbour, Harada was assigned patrol duties over the carriers. During the attack on Colombo on 5 April 1942, Harada engaged in air combat with British fighters and, to his credit, shot down five, (two probables) single-handedly. During an intercept of Hudson [Blenheim] bombers that attacked the striking force on the 9th, Harada and others jointly shot down two aircraft. Next Harada participated in the Battle of Midway and served on combat air patrol. During the course of three intercept operations, he shot down five enemy torpedo bombers, three jointly. Since the Soryu had been sunk however, Harada had to ditch and was picked up by a destroyer. In July, Harada was transferred to serve on board the Hiyo. In early October he left the homeland to participate in the Guadalcanal operation. During the attack on Guadalcanal on 17 October, while Harada escorted the carrier attack plane squadron, he engaged in combat with a force of of enemy fighters that had made a surprise attack on him by taking advantage of their superior altitude. After Harada had shot down one aircraft (a probable), he was hit and suffered severe injuries. He was forced to make an emergency landing close to the Rekata base. Harada was taken back to the homeland in a hospital ship and treated for wounds to his left shoulder and arms. Harada greeted the end of the war without having been able to regain his health. Number of aircraft shot down, nine (officially recognised)."