Trisul, West Face. A seven-man Japanese expedition climbed the Yugoslavian route on Trisul’s west face. The leader was Kozo Sakano. Base Camp was established at 15,550 feet on September 4 and Camp I at 16,900 feet on the 7th. Camp II was placed at the foot of the southwest ridge at 19,350 feet and Camp III at 20,775 feet on the 22nd. Ropes were fixed up to 22,475 feet, where Camp IV was made on October 2. On October 3 Sakano, Toshio Arai, Kimiaki Miura and Hiroshi Nihei reached the summit (7120 meters, 23,360 feet).