Stocks opened higher Monday in Tokyo as the US dollar advanced against the yen, the dpa reported.
The Nikkei 225 Stock Average soared 205.89 points, or 1.47 per cent, to 14,179.62.
The broader Topix index of all first-section issues was also up 13.04 points, or 0.95 per cent, at 1,384.61.
On currency markets at 9 am (0000 GMT), the dollar was quoted at 108.25-30 yen, up from Friday's 5 pm quote of 108.06-08 yen. A weaker yen makes Japanese products cheaper overseas and boosts earnings of Japanese companies.
The euro was quoted at 1.5381-86 dollars, down from Friday's 5 pm quote of 1.5387-89 dollars, and at 166.56-61 yen, up from 166.28-32 yen.