UENO, Gunma Pref. — Relatives and friends of those who died in the 1985 Japan Airlines jumbo jet crash marked the 25th anniversary of the world's worst single-aircraft accident Thursday by climbing to the crash site in Gunma Prefecture to offer prayers to those lost.

Among the mourners was Yumiko Kobayashi, 51, from the city of Saitama, whose sorrow at losing her younger brother, Hiroyuki Kato, 21, remains unchanged despite all the years.

"If I think of all the conversations we could have had, I feel sad and frustrated," she said.