TOKYO, April 21 (Reuters) - The Bank of Japan on Thursday offered to buy unlimited amounts of 10-year Japanese government bonds (JGBs) at 0.25% in its efforts to defend its yield cap.

The move is in line with an announcement the BOJ made on Wednesday to offer unlimited purchases of the bonds from Thursday to Tuesday next week to keep the 10-year JGB from rising above the implicit 0.25% cap it sets around its 0% target.

(Reporting by Junko Fujita; Editing by Tom Hogue)