Relatives of the victims of the 1985 Japan Airlines jetliner crash on Saturday commemorated the 32nd anniversary of the world's deadliest single-aircraft accident that claimed the lives of 520 crew and passengers.

Relatives climbed to the Boeing 747's crash site on Osutaka Ridge in Gunma Prefecture to mourn their loved ones lost in the accident.

"An aviation accident that claimed so many lives should not be forgotten," said Masato Sasaki, a 57-year-old doctor from Yatsushiro, Kumamoto Prefecture, who lost his uncle, Yutaka Sasaki, co-pilot of the aircraft, in the accident.