Japanese super long-term bonds fell on Wednesday, pushing long-term yields to a historic high, as concerns grew over the government's debt financing stimulus plan. The yield on Japan's 30-year government bonds rose by 2.5 basis points during the day to 3.45%, surpassing the record set earlier this week. The yield on 40-year government bonds increased by 1.5 basis points to 3.715%. Long-term bond yields have been rising sharply since early November, as the market speculates on the scale of Prime Minister Fumio Kishida's debt stimulus plan, while short-term bond yields have risen after the Bank of Japan hinted at its readiness to continue raising interest rates.

According to Japan Broadcasting Corporation NHK, Japan is preparing to issue approximately 29.6 trillion yen (about $189.55 billion) in new government bonds for the fiscal year 2026 budget. However, Fumio Kishida reiterated in an interview with the Nikkei newspaper on Tuesday that her "positive" fiscal plan does not include irresponsible bond issuance or tax cuts.