Japanese investors lifted net purchases of foreign bonds to ¥1,629.4 billion in the week ending August 7, up sharply from a revised ¥477.9 billion a week earlier, Ministry of Finance data showed. In the same week, Japan Exchange Group data showed foreign investors turned net sellers of Japanese stocks, with a ¥368.5 billion outflow after a ¥392.5 billion net inflow the previous week. Together, the figures point to volatile cross-border portfolio flows as markets weigh interest-rate expectations, yen moves and broader risk sentiment. Analysts cautioned that weekly data can be distorted by one-off trades, so several weeks of figures are usually needed to judge underlying trends.