TOKYO The Bank of Japan warned on Thursday of "high uncertainties" following the ruling party's worst election result in 15 years, as it kept interest rates unchanged. Last week’s snap election saw Prime Minister Shigeru Ishiba's coalition lose its majority, likely forcing him to head a minority government with case-by-case support from other parties to pass legislation. Businesses and economists worry that as concessions to other parties, Ishiba will offer tax cuts and higher spending, and go