Tsuneo Hasegawa

Tsuneo Hasegawa was a Japanese alpinist. His achievements include the winter solo ascent of the "Great North Faces of the Alps" or "North Face Trilogy" and the world's first winter solo ascent of the South Face of Aconcagua in 1981. He died in 1991 in an avalanche while ascending the Ultar Ⅱ South east face.

Source: Wikipedia