As Basel's move prompted investors to sell shares worldwide to offset losses on the franc, JGBs attracted flight-to-quality bids.
The 10-year JGB yield fell to as low as 0.225 percent , setting record lows for four days in a row. It last stood at 0.240 percent, down 0.5 basis point on the day.
The 20-year yield dipped 0.5 basis point to 0.905 percent .
Global bond prices rallied on Thursday, with the U.S. 30-year bond yield hitting a record low.