For Japanese looking to travel to the United States this year, the best exchange rates for the yen are likely to last until around June -- that is, if market predictions prove to be correct.

After that, the yen is expected to weaken against the U.S. currency, so instead of spending abroad, one might be better off putting savings in dollar deposits.

Many dealers and market analysts predict that in the first half of this year, the dollar will come under downward pressure from geopolitical tensions.