Mango Gusor, 1980. An expedition of three Japanese made the first ascent of Mango Gusor (6288 meters, 20,633 feet). They established Base Camp in the Stokpa valley at 13,800 feet on June 15, 1980. Camp I was on the glacier at 15,100 feet and they pitched Camp II above the icefalls at 17,725 feet on the 29th. On July 2, 1980 Tateshi Sudo, leader, Takanori Higuchi and Kaname Tekeuchi got to the summit. They had to bivouac at 19,850 feet on the descent.