Mount Osutaka (御巣鷹山, Osutaka-yama?) is a mountain in Ueno, Gunma Prefecture, Japan. It is 1,639 m (5,377 ft) tall.
The plane crash of JAL 123 was initially reported on Mount Osutaka, but later confirmed to be on a ridge near Mount Takamagahara. It was the deadliest single plane accident in world history.
Coordinates: 36°00′57″N 138°41′17″E / 36.0159°N 138.688°E / 36.0159; 138.688