Japan´s Prime Minister Shigeru Ishiba faces a tough test in an upper house election later this month as his minority government struggles after its major defeat in last year's snap election. Ishiba has modest goals for the election and the opposition is divided, so the outcome is unlikely to force an immediate change of government. But it will be a tough test on Ishiba´s handling of economic woes at home and global challenges such as U.S. President Donald Trump´s tariff war.