This trek was officially opened to tourist in 1991, but mountaineering expeditions have had long access to the area. In 1950 a party led by H.W. Tillman trekked from Pupinala trekking, trekking in rupinala, nepal rupinala trekking, trekking in manaslu region, Thonje to Bimtang and col. Jimmy Roberts crossed the Larkya La looking for an interesting mountain to climb. Manaslu( 8163m) was attempted by Japanese Expeditions every year from 1952 until 1956 when the first ascent was made. Having become known as “Japanese Mountain” much of the information about the area was available in Japanese. The Japanese continued to dominate the climbing scene of Manaslu until 1971.