Japan's yen was climbing against the U.S. dollar Monday after Prime Minister Shigeru Ishiba vowed to stay on, even though his ruling coalition just lost its majority in the country's upper house. The

The U.S. dollar strengthened against the Swiss franc and euro but weakened versus the yen on Wednesday as positive sentiment from a new U.S. trade deal was offset by political uncertainty surrounding Japanese Prime Minister Shigeru Ishiba's future.