"We will look at the currency market not in the short term but in the mid to long term and look at what effects it has on the economy," Ishihara told reporters after a regular cabinet meeting.

The dollar weakened to a five-week low versus the yen and other currencies, hit by a loss of confidence in the U.S. reflation trade a day after a news conference by President-elect Donald Trump.

(Reporting by Minami Funakoshi; Editing by Chris Gallagher)