日本至6月20日当周买进外国债券 6155亿日元，前值由15713亿日元修正为15673亿日元。

Group 1 - The core point of the article indicates that Japan purchased foreign bonds amounting to 615.5 billion yen for the week ending June 20, which is a decrease from the previously revised value of 1,571.3 billion yen to 1,567.3 billion yen [1]