Japanese government bond yields were steady on Wednesday, as investors adopted a wait-and-see attitude ahead of a crucial policy decision from the U.S. Federal Reserve later in the global day. Fed policymakers had adopted a more hawkish tone in the run-up to the meeting, signalling a quicker pace at which they taper bond-buying stimulus, which would potentially set up earlier interest rate hikes. read more "A degree of hawkishness from the meeting has already been priced in by the market, but there could still be surprises at (Fed Chair Jerome Powell"s) news conference around topics like tapering or a flexible approach to policy," said Hideki Shibata, senior rates and currencies strategist at Tokai Tokyo Research Institute. The 10-year JGB yield was flat at 0.045% as of 0530 GMT, as was the five-year yield at minus 0.100%. The 20-year and 30-year yields were unchanged at 0.450% and 0.660%, respectively. Two-year JGBs were untraded, and last yielded minus 0.115%. Benchmark 10-year JGB futures rose 0.06 point to 152.08, with a trading volume of 14,247 lots. The Bank of Japan bought about 1.46 trillion yen ($12.85 billion) of bonds in its third operation in three straight days. Reporting by Tokyo markets team; Editing by Rashmi Aich Our Standards: The Thomson Reuters Trust Principles.