Japan to Slash Super Long Bond Supply, Issuance Falls to 17 Year Low

Two government sources in Tokyo said on December 24 that the finance ministry planned to cut new issuance of 20 year, 30 year and 40 year Japanese government bonds to roughly ¥17 trillion in the debt plan for the next fiscal year. If confirmed, the total would be the smallest annual volume of these super long maturities in 17 years and represents a sharp curtailment from previous projections.

The proposed reduction follows a mid year revision in June in which planned super long issuance for the current fiscal year was trimmed to ¥21.4 trillion from an earlier ¥24.6 trillion after a bond market selloff forced officials to scale back supply. Market volatility that sent long dated yields to record highs prompted officials to reassess how much long dated paper the government should place in the market.

The ministry’s own meeting notes from the Meeting of JGB Market Special Participants, published on the finance ministry website, recorded market participant views that supported lower super long issuance. The summary said life insurance companies had reduced their natural demand for long dated paper as they adjusted to regulatory and balance sheet constraints. For 30 year bonds in particular, participants saw much of current demand as replacement demand for off the run issues, leaving the overall supply demand balance relatively weak. The meeting summary also noted there was scope to increase issuance of short term, medium term and non super long long term bonds based on prevailing investor demand.

Trading conditions responded quickly to the expected reduction in supply. Market data showed the 20 year yield fell as low as 2.94 percent and was last around 2.965 percent, while the 30 year yield fell as low as 3.38 percent from a record high of 3.45 percent and was last near 3.395 percent. The easing in long dated yields reflected relief among investors who had feared oversupply and persistent volatility.

Officials were reported to be cautious about raising issuance of benchmark 10 year bonds in the forthcoming plan, reflecting a delicate policy trade off between meeting funding needs and avoiding adding pressure in the most liquid part of the curve. Analysts and market participants also linked recent bond market turbulence to concerns over the size of debt funded stimulus under Prime Minister Sanae Takaichi, which magnified sensitivities to supply.

The likely shift in the debt funding mix carries several implications. Reducing super long supply should calm immediate market strains and lower long dated yields, improving swap and portfolio valuations for holders of long duration assets. At the same time, systematic reductions in issuance of long dated paper could complicate life insurers’ asset liability management by shrinking opportunities to lock in long term returns and may force greater use of shorter dated instruments or derivatives.

Longer term, the adjustment signals a more active approach by the finance ministry to manage JGB supply in response to market liquidity and investor demand. The final decision will be embedded in the ministry’s next fiscal year debt sale plan, and if the ¥17 trillion figure is confirmed it will mark a notable recalibration in how Tokyo finances its large and persistent budget deficits.