Diran, North Ridge. The six-man expedition of the Hirosaki University Alpine Club was led by Ken Takahashi. They climbed the north ridge, which had not been climbed before, although Austrians had descended it in 1985. On July 11, Takahashi, Suzuki, Nobuo Tsutsumi, Masayuki Ando, Hiroshi Hori and Tetsuro Yoshimura reached the summit. There were three parties on the same route and some of the route fixing took place in cooperation with another Japanese party from Toyo University.