TOKYO (Reuters) -- Japan's 10-year government bond yield rose above the Bank of Japan's policy ceiling on Monday, despite the bank's announcement it would conduct bond buying operations, which include offers to buy unlimited amounts of shorter-term notes.
The 10-year JGB yield rose 1 basis point to 0.51%, topping the 0.5% ceiling of the BOJ's policy band.
Yields across the curve were under upward pressure ahead of this week's BOJ policy meeting, at which some investors expect a further tweak in the bank's ultraloose interest rate policy.
In a surprise move last month, the BOJ widened the band for the 10-year bond yield to 0.5 of a percentage point up and down from its 0% target.
Yields at the superlong end fell, with the 30-year JGB yield down 5 basis points to 1.56%, its lowest level since Dec. 27.
Yields on 20-year bonds slipped 4 basis points to 1.345%.