March 20 (Reuters) - Japanese government bonds weakened slightly on Tuesday, with traders wary of actively taking positions before the U.S. Federal Reserve's two-day policy meeting that starts later in the day and a holiday in Japan.
The key June 10-year JGB futures contract eased 0.02 point to 150.87.
The benchmark 10-year JGB yield inched up 0.5 basis point to 0.040 percent.
Japanese financial markets will be closed on Wednesday for a public holiday. (Reporting by Tokyo markets team; Editing by Amrutha Gayathri)