Tsuneo Hasegawa (長谷川 恒男, Hasegawa Tsuneo, December 8, 1947 – c. October 10, 1991) was a
Japanesealpinist. His achievements include the winter solo ascent of the "Great North Faces of the Alps" or "North Face Trilogy" (
Matterhorn in 1977, second winter solo ascent ever;
Eiger in 1978, first winter solo ascent ever;
Grandes Jorasses in 1979, also first winter solo ascent ever) and the world's first winter solo ascent of the South Face of Aconcagua in 1981.[1][2] He died in 1991 in an avalanche while ascending the
Ultar II South east face.[3]
Notable achievements
1977 World second winter solo ascent to
Matterhorn North face[4]
1978 World first winter solo ascent to
Eiger North face[5]