Japan's 30-year government bond sale attracted the weakest demand since June, signaling persistent investor caution amid escalating Middle East tensions. The auction, which sets borrowing costs for decades, drew less than the 12-month average participation rate, reflecting heightened risk aversion in global fixed income markets. This shortfall comes as central banks worldwide grapple with balancing inflation control against potential economic slowdowns triggered by regional conflicts. The weaker-than-expected demand underscores how geopolitical uncertainty is reshaping capital flows, potentially forcing Japan to offer higher yields to attract buyers for its massive debt burden. Analysts suggest this trend may persist unless Middle East tensions de-escalate, keeping Japanese government bonds under pressure despite their traditional status as a safe-haven asset.