1-C. In 1974, three Japanese - Mieko Mori, Naoko Nakaseko, and Masako Uchida - became the first women to succeed in climbing one when they reached the peak of Manaslu in Nepal.In 1974, three Japanese - Mieko Mori, Naoko Nakaseko, and Masako Uchida - became the first women to succeed in climbing one when they reached the peak of Manaslu in Nepal.