日本20年期国债收益率升至2.64%，为1999年11月以来的最高水平。

Core Insights - Japan's 20-year government bond yield has risen to 2.64%, marking the highest level since November 1999 [1] Group 1 - The increase in the 20-year bond yield indicates a significant shift in the Japanese bond market [1] - This rise may reflect changing investor sentiment and expectations regarding future interest rates and economic conditions in Japan [1]