The Japanese yen has weakened against the US dollar amid caution from Bank of Japan (BOJ) Governor Kazuo Ueda regarding the timing of potential interest rate hikes. Ueda's remarks have led to uncertainty about future monetary policy, contributing to the dollar's strength. As a result, the dollar has risen against the yen, reflecting a broader trend in the currency markets. However, recent reports indicate that the dollar's rally has stalled, providing some respite for the yen. Analysts suggest that Japan's verbal warnings about currency movements may be losing effectiveness as market dynamics shift.