Tokyo's benchmark stock index soared more than 3.0 percent in early trade Monday, after a landslide victory in parliamentary elections by Prime Minister Shinzo Abe's ruling party boosted stimulus hopes.

The Nikkei 225 surged 3.04 percent, or 459.96 points, to 15,566.94 in the first half hour of trade, while the broader Topix index of all first-section shares climbed as much as 2.88 percent, or 34.84 points, to 1,244.72.