The Bank of Japan conducted an emergency bond purchase on Wednesday, offering to buy more bonds than at their previous unscheduled operation, but failed to stop Japanese government bond yields from climbing to fresh decade highs.

The benchmark 10-year JGB yield rose to 1.805% for the first time since August 2013, after the BOJ offered to buy an additional ¥675 billion ($4.52 billion) worth of bonds with maturities between five and 10 years.

The central bank had announced on Monday that it would conduct the previously unscheduled bond-buying operation after the 10-year yield hit its highest in a decade that day.