Yuichiro Miura, a former extreme skier who also climbed the 8,850-meter (29,035-foot) peak when he was 70 and 75, reached the summit at 9:05 a.m. local time, according to a Nepalese mountaineering official and Miura's Tokyo-based support team.
It was a moment Japanese news agency Kyodo captured on video from 10 kilometers (6 miles) away, using a camera crew at 5,500 meters (18,000 feet) elevation on another mountain.
"We have arrived at the summit," Miura said in a radio transmission to Kyodo from the world's highest point. "80 years and 7 months. ... The world's most incredible mountaineering team had helped me all the way up here."
Miura and his son Gota made a phone call from the summit, prompting his daughter Emili to smile broadly and clap her hands in footage shown by Japanese public broadcaster NHK.