A 23-year-old Japanese university student became the youngest person to scale the tallest peak on each of the world's seven continents when he conquered Mount Everest on Friday, his supporters said.

Atsushi Yamada, a University of Tokyo student who hails from Kobe, reached the 8,850-meter summit at around 8:45 a.m., his supporters said.

Yamada set off on March 30 with four other mountaineers.

In 1999, Yamada climbed Africa's Mount Kilimanjaro, before going on to climb Mount Aconcagua in South America, Mount McKinley in North America, Mount Elbrus in Europe, the Vinson Massif in Antarctica and Mount Kosciusko in Australia.

Yamada is the sixth Japanese to perform the feat. Yamada, who completed the climb at the age of 23 years, nine days, nudged out Naoki Ishikawa as the youngest. Ishikawa climbed the last of the seven peaks in May 2001 at the age of 23 years, 327 days.