A 73-year-old Japanese woman has climbed Mount Everest, smashing her own record to again become the oldest woman to scale the world's highest mountain.

Ang Tshering of the China Tibet Mountaineering Association said Tamae Watanabe reached Everest's 29,035-foot-high summit from the northern side of the mountain in Tibet this morning with four other team members.

Mr Tshering said Ms Watanabe and the other team members are in good condition and are on their way back to the base of the mountain.

Ms Watanabe had climbed Everest in 2002 at the age of 63 to become the oldest woman to scale the mountain.

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