Disputed upper house elections in Japan could affect Prime Minister Shigeru Ishiba's control of the upper house amid rising prices and concerns over immigration.

Japan is gearing up for a major election and Sunday's vote could cause political chaos. Polls suggest that Prime Minister Shigeru Ishiba's Liberal Democratic Party (LDP) could lose control of the upper house to smaller parties demanding tax cuts. A weak result could affect investor confidence and trade talks with the United States. Ishiba faces pressure to make concessions as his administration recently lost its majority in the lower house.