Diran Attempts and Tragedy. Of the expeditions which went to Diran (7257 meters, 23,810 feet) in 1989, only the Japanese group led by Ken Takahashi was successful. Seven Koreans were led by Chang Su-Jeong. On June 20, Ha Sang-Woen and Lee Su-Hee died in an avalanche and the expedition was given up. Also unsuccessful were Japanese led by Katsumasa Nakamura, Germans under Norbert Nanzel and French under the leadership of Luc Berthaud.