Japan's shaky minority government is poised for another setback in an upper house vote on Sunday, an outcome that could jolt investor confidence in the world's fourth largest economy and complicate tariff talks with the United States.

Migration, tariffs and other economic issues dominating Japan's upper house election. Read more

Japan's sales tax rate is set at 10%, except for food items at 8%. Ishiba has shunned opposition calls to slash the sales tax, which funds social welfare costs for a rapidly ageing population. An election defeat could force Ishiba to cut sales tax, which would leave a huge hole in Japan's finances.

Migration, tariffs and other economic issues dominating Japan's upper house election.

The yen came under pressure on Friday heading into Sunday's upper house election in which Japan's ruling party looks vulnerable, while, more broadly, the U.S. dollar was set for a second weekly gain against major peers,

Following Trump's election victory, Democratic Party faces criticism as strategists acknowledge poor polling numbers and figures like Mark Cuban slam the party's current strategy