Namcha Barwa is a mountain in the Himalayas range, in Tibet. It is the 28th highest mountain in the world. From 1976 to 1992, it was the highest unclimbed mountain on Earth. The first people to reach the top were Kazuo Yamamoto, Hiroshi Aota, Atsushi Yamamoto, Jiabu, Chirenduoji, and Biamba Zaxi, in 1992.