The yen rose against the dollar for the first time in four sessions on Monday after Japanese Prime Minister Shinzo Abe won a widely expected victory in elections for parliament's upper house.

Investors had already priced in Abe's victory and had sold the yen against the dollar ahead of the outcome, and market participants locked in profits as a result. The victory represents a rare bout of political stability in Japan and strengthens the mandate for Abe's reflationary policies.