Tsuneo Hasegawa

Tsuneo Hasegawa (長谷川 恒男, Hasegawa Tsuneo, December 8, 1947 – c. October 10, 1991) was a Japanese alpinist.

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.

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