日本至6月13日当周买进外国债券 15713亿日元，前值由-4586亿日元修正为-4536亿日元。

Group 1 - Japan purchased foreign bonds amounting to 15,713 billion yen for the week ending June 13, indicating a significant investment in foreign assets [1] - The previous value of foreign bond purchases was revised from -4,586 billion yen to -4,536 billion yen, reflecting a positive adjustment in the data [1]