Kusutn Kanguru, North Face Solo. Japanese Hiroshi Aota and Takao Kurosawa placed Advance Base below the north ridge of Kusum Kanguru on April 5 and started up the north ridge, bivouacking on April 6 and 7 at 5300 and 5600 meters, but Kurosawa found that he was not strong enough to continue. On the 14th Aota started up the north face alone and in 9½ hours reached the western summit, where he bivouacked. On April 15 he followed the knife-edged ridge to the summit (6367 meters, 20,889 feet).