Longer-dated Japanese government bonds declined Monday after Prime Minister Fumio Kishida’s Liberal Democratic Party secured a strong mandate in Sunday’s parliamentary elections. The LDP-led coalition maintained its two-thirds majority in the lower house, reinforcing expectations of continued fiscal stimulus and potential monetary policy adjustments under Bank of Japan Governor Kazuo Ueda.

Market participants interpreted the election outcome as reducing political pressure for immediate changes to Japan’s ultra-loose monetary stance. Yields on 30-year JGBs rose 2.5 basis points to 1.745%, while 20-year yields climbed 3 basis points to 1.485%. The moves reversed Friday’s gains as traders priced in prolonged accommodative policies.

The selloff reflects investor concerns about Japan’s growing debt burden, which exceeds 260% of GDP. With the LDP retaining control, markets anticipate sustained bond purchases by the BOJ to cap borrowing costs. However, some analysts warn this approach risks further yen weakness and imported inflation.

Monday’s bond moves contrasted with relative stability in shorter-dated debt, where the BOJ’s yield curve control remains firmly intact. The yen held near 149.50 against the dollar as currency traders weighed diverging monetary policies between Japan and other major economies.

Quick Fact: The LDP secured its lower-house election victory on Sunday.