By Tom Westbrook SINGAPORE (Reuters) -A sliding yen helped the dollar higher on Thursday as the Bank of Japan lowered growth forecasts in light of U.S. tariffs and left rates on hold, while investors watched for signs of the trade war cooling and waited for U.

The Japanese yen is the weakest of the G10 currencies following what is seen as a dovish hold by the Bank of Japan, which cut growth forecasts, shaved inflation projections, and delayed reaching its inflation target on a sustained basis.