U.S. President Donald Trump isn't the only leader with a big economic hire to make.

His Mar-a-Lago golf partner, Prime Minister Shinzo Abe, has to decide whether to reappoint Haruhiko Kuroda as governor of the Bank of Japan. Kuroda's term expires next April, two months after Janet Yellen's at the U.S. Federal Reserve.

There are powerful reasons for Abe to break with tradition and give Kuroda a second turn. Since the BOJ gained independence two decades ago, no governor has been reappointed. For most of that time, Japan's economic performance was truly disappointing and the country's leaders felt the bank hadn't been aggressive enough in turning the tide against stagnation and deflation.