Source: Ministry of Finance Japan
This service uses government bond interest rate data published by the Ministry of Finance Japan, but the content of this service is not guaranteed by the Ministry of Finance.
This service uses statistical data published by the Bank of Japan, but the content of this service is not guaranteed by the Bank of Japan.
At the end of June 2026, the JGB market saw the 10-year yield reach 2.690%, up +0.033 percentage points from the end of the previous month and up +0.558 percentage points from three months earlier. The monthly average yield was 2.654%, virtually unchanged from the prior month at +0.006 percentage points, while the year-to-date trend remains upward at +0.451 percentage points. The real yield (nominal 10Y − CPI year-on-year) expanded to 1.190%, up +0.033 percentage points month-on-month, confirming an increase within positive real-yield territory. The 10Y-2Y spread widened to 1.308% (+0.044 percentage points month-on-month), reinforcing a normal upward-sloping yield curve, while the 30Y-10Y spread narrowed to 1.183% (−0.019 percentage points month-on-month), indicating relative flattening in the ultra-long segment. With CPI year-on-year stable at 1.5%, the rise in nominal yields is entering a phase that directly increases real borrowing costs.
According to MOF-published data, the yield curve at end-June 2026 maintains a clear normal upward slope across maturities. Short-term (1Y) yields were 1.165%, medium-term (5Y) 1.937%, long-term (10Y) 2.690%, and ultra-long (30Y) 3.873%, showing higher yields for longer maturities.
Month-on-month, 1Y was +0.048 percentage points, 2Y −0.011 percentage points, 5Y +0.018 percentage points, 10Y +0.033 percentage points, and 30Y +0.014 percentage points — with increases concentrated in the short and medium-to-long segments while only the 2Y fell slightly. Over three months, all maturities rose materially: 1Y +0.142 percentage points, 5Y +0.343 percentage points, 10Y +0.558 percentage points, and 30Y +0.531 percentage points, with larger increases in the medium-to-long segments. This pattern exhibits characteristics of bear steepening (a steepening of the curve accompanied by rising yields).
Monthly average yields from January to June 2026 show persistent upward trends across maturities: 2Y rose from 1.215% to 1.411% (+0.196 percentage points), 5Y from 1.653% to 1.938% (+0.285 percentage points), 10Y from 2.203% to 2.654% (+0.451 percentage points), and 30Y from 3.526% to 3.798% (+0.272 percentage points). The 10Y experienced the largest increase, confirming stronger upward pressure in the medium-to-long zones.
The 40Y yield remains inverted relative to the 30Y, at 3.792% below the 30Y (3.873%), a persistence of inversion likely driven by demand factors in the ultra-long segment (pension funds and similar ultra-long preferences). However, month-on-month changes were 40Y +0.003 percentage points and 30Y +0.014 percentage points, so the inversion margin is narrowing.
The 10Y-2Y term spread widened to 1.308% in June 2026, up +0.044 percentage points month-on-month and up +0.317 percentage points from three months earlier (0.991% in March 2026). This spread widening is a typical steepening pattern reflecting expectations of economic recovery, indicating long-term yields are rising more than short-term yields while short-term rates remain relatively subdued. On a monthly basis, the spread moved from 0.996% in January 2026 to a temporary trough of 0.882% in February, then shifted to an expanding trend from March onward, reaching 1.264% in May and 1.308% in June.
By contrast, the 30Y-10Y spread narrowed to 1.183% (−0.019 percentage points month-on-month), down −0.091 percentage points from three months earlier (1.274% in March). Monthly movement shows a clear downtrend from a January 2026 peak of 1.330%: February 1.210%, March 1.274%, May 1.202%, June 1.183%. The narrowing of this ultra-long spread indicates that yield increases in the ultra-long segment have been more restrained relative to the 10-year zone, suggesting relative stability in ultra-long fiscal confidence.
The 40Y-10Y spread likewise narrowed to 1.102% (−0.030 percentage points month-on-month), a substantial −0.245 percentage point contraction from three months earlier (1.347% in March). From a January 2026 level of 1.434%, the spread has contracted steadily, indicating flattening across the entire ultra-long segment.
These spread movements imply simultaneous dynamics: steepening between short and medium maturities driven by recovery expectations, and flattening between medium and ultra-long maturities driven by stabilization of long-term fiscal risk premia. The widening of the 10Y-2Y spread reflects that, even as the BOJ gradually normalizes policy and raises short-term rates, long-term yields are rising by more — interpreted as the market pricing in stronger future growth and inflation.
Calculating nominal 10Y yield 2.690% minus CPI year-on-year 1.5% yields a real yield of 1.190%. This is +0.033 percentage points higher than the prior month's real yield of 1.157% (nominal 2.657% − CPI 1.5%), and a substantial +0.324 percentage point increase from three months earlier (0.866%, nominal 2.366% − CPI 1.5%).
Monthly progression shows a continuous rise from 0.747% in January 2026: February 0.832% (+0.085 percentage points), March 0.866% (+0.034 percentage points), May 1.157% (+0.291 percentage points), and June 1.190% (+0.033 percentage points). The expansion of positive real yields means the pace of nominal yield increases has significantly outstripped CPI inflation.
CPI year-on-year peaked at 3.3% in June 2025 and has trended down to 1.5% by May 2026. The core index (excluding fresh food) is 1.4% and the core-core index (excluding fresh food and energy) is 1.8%, both below 2%. With inflation slowing while nominal yields rise, real-yield increases closely track nominal-yield increases.
A real yield of 1.190% indicates a clear exit from the long-standing financial repression regime of negative real yields. Through December 2025 CPI YoY remained above 2%, but falling into the low-1% range in 2026 has created an environment in which nominal yield increases translate directly into higher real borrowing costs.
From the perspective of real borrowing costs, a real funding cost of 1.190% for newly issued 10-year JGBs means that Japan, carrying a debt stock exceeding 250% of GDP, is entering a phase where the real burden of interest payments is rising. Conversely, for savers, the shift to positive real returns on JGB holdings implies a reversal of the real erosion of assets caused by prolonged financial repression.
Call-rate data are not available, so a direct comparison with the BOJ's policy rate cannot be made here. Nevertheless, the across-the-curve rise in JGB yields reflects the BOJ's monetary policy normalization process feeding through to market rates.
The 1Y yield of 1.165% — the maturity most sensitive to short-rate policy — rose +0.048 percentage points month-on-month and +0.142 percentage points over three months, indicating the market is pricing in a phased lift in short-term rates. The 2Y yield at 1.382% was slightly down −0.011 percentage points month-on-month but up +0.132 percentage points over three months, showing short-term adjustments amid an overall upward trend.
The BOJ's balance-sheet policy (the unwinding of quantitative easing) influences the market via changes in JGB holdings. The BOJ's JGB share is about 46%, and as BOJ quantitative tightening (QT) proceeds, the private sector will be required to absorb a larger share of JGB supply. This shifting supply-demand balance is manifesting particularly as upward pressure on medium-to-long-term yields.
The monthly-average 10Y yield increase from 2.203% in January 2026 to 2.654% in June 2026 (+0.451 percentage points) highlights the magnitude of policy normalization's impact on long-term rate formation. With Yield Curve Control (YCC) effectively abandoned, the 10Y yield now moves more freely according to market supply-demand and expectation formation, reflecting reduced reliance on fiscal finance.
Cabinet Office composite index (CI) data (latest available: April 2026) show the leading index at 116.1 and the coincident index at 118.1, both rising month-on-month. The leading index increased from 112.5 in January 2026 to 116.1 in April (+3.6 points), and the coincident index rose from 117.9 to 118.1 (+0.2 points). The improving trend in these indicators is consistent with the rise in JGB yields.
The increase in the leading index suggests market expectations of future economic expansion, which aligns with markets pricing higher long-term yields based on anticipated stronger growth and inflation. The improvement in the coincident index indicates current expansion in economic activity, supporting expectations of higher corporate profits and increased tax revenues — factors that can improve the fiscal outlook.
The lagging index was 111.9, essentially unchanged month-on-month, implying that employment and wage-related lagging indicators remain somewhat cautious. However, if leading and coincident improvements continue, the lagging index is likely to follow.
The widening 10Y-2Y spread (1.308%) is a typical yield-curve shape during recovery and is congruent with the improving CI data. The market appears to prioritize medium-to-longer-term growth and inflation prospects over short-term policy-rate increases when pricing long-term yields, consistent with the leading index's signal of future expansion.
With CPI year-on-year at a low and stable 1.5% while activity indicators improve, this suggests real growth is proceeding under price stability, which could raise nominal GDP growth (g). An increase in nominal GDP growth would improve the r-g differential (narrow the gap between r and g), potentially supporting debt sustainability.
BOJ Tankan (Q1 2026) shows the large-manufacturing sector's business conditions DI at 17 (+2 points vs. previous survey) and large non-manufacturing at 36 (+2 points), both improving. Future outlook DIs are 15 for large manufacturers and 28 for large non-manufacturers, slightly more cautious than current conditions but still at favorable levels.
Midsize manufacturers' DI stood at 16 (±0 points), and small manufacturers at 7 (+1 point), indicating improvements or stability across firm sizes. Improved corporate assessments support expectations for higher corporate tax receipts, contributing to a better fiscal picture.
The assumed exchange rate used in the survey is 150.1 JPY/USD across all sizes and industries, and 148.91 JPY/USD for large manufacturers, representing a shift toward a weaker yen from the prior survey (147.06 JPY, 146.48 JPY). Yen depreciation boosts exporters' profits but can also raise import costs and thus CPI. Given CPI YoY was 1.5% in May 2026, the inflationary impact of the weaker yen appears limited at present.
Improving corporate sentiment can lift investment and employment, raising the economy's growth rate (g). Although JGB yields (r) are rising concurrently, if corporate profitability improvements drive higher tax revenues and nominal GDP growth, these factors can mitigate a deterioration in the r-g differential.
The simultaneous improvement in business-condition DIs and the rise in the 10Y yield suggests the market interprets corporate profitability gains as a catalyst for faster economic growth and thus higher future rates. This dynamic reflects a shift away from fiscal financing dependence toward market-based rate formation.
MOF trade statistics indicate a trade surplus of ¥94.8 billion in December 2025. This narrowed from a ¥306.0 billion surplus in November 2025, but the surplus trend remains intact. Over the preceding six months, deficits persisted from July to October 2025 before turning to a surplus in November and remaining so in December.
Exports in December 2025 were ¥10,407.7 billion (+7.2% month-on-month) and imports ¥10,312.9 billion (+9.7% month-on-month). The maintenance of a trade surplus despite increases in both exports and imports suggests external demand resilience.
The current account comprises the trade balance plus services, primary income, and secondary income balances. Japan's current-account structure benefits from a large primary income surplus (interest and dividends from foreign investments), meaning the current account can remain in surplus even if the trade balance is negative. The return to a trade surplus further strengthens current-account stability.
For Japan's unique fiscal sustainability condition, the combination of a current-account surplus and domestic holdings of 88% (BOJ 46% + private financial institutions, etc. 42%) is important. A current-account surplus implies accumulation of net external assets, allowing sovereign debt absorption without heavy reliance on foreign funding. Domestic holdings of 88% limit the risk of JGB sell-offs due to exchange-rate or foreign investor sentiment shifts.
The shift to a trade surplus enhances the durability of current-account surpluses and supports external fiscal credibility. Even as JGB yields rise, the narrowing 30Y-10Y spread suggests ultra-long-term fiscal risk premia remain contained, consistent with the stabilizing influence of a current-account surplus and the domestic-holdings structure.
However, as BOJ QT reduces the BOJ's share of holdings, private financial institutions and households will need to absorb more JGBs, which could translate into upward pressure on yields. The extent to which current-account surpluses can supply the funding needed to absorb this private demand will be a key focus going forward.
As of June 2026, the JGB market sits at a pivot where both nominal yields and real yields are rising. The 10Y yield at 2.690% and a real yield of 1.190% mark a clear exit from prolonged financial repression and signal a new fiscal environment in which the government's real borrowing costs are increasing.
In terms of interest-payment implications, higher nominal yields raise funding costs for newly issued and refinanced debt. With debt exceeding 250% of GDP, a 1% increase in the average funding rate would raise interest payments by an amount equivalent to 2.5% of GDP. The year-to-date +0.451 percentage point rise in the 10Y yield indicates that medium-to-long-term upward pressure on interest payments is materializing.
Regarding the r-g differential, nominal yields (r) are rising while the improvement in CI and corporate sentiment suggests nominal GDP growth (g) may also increase. Whether g plus CPI (i.e., nominal growth) can outpace the 10Y yield of 2.690% (keeping r<g) is central to debt dynamics. If nominal growth runs around 3%, the r-g differential could remain negative (growth exceeding interest rates), supporting automatic improvements in the debt-to-GDP ratio.
On fiscal sustainability, a projected primary balance (PB) surplus for FY2026 would represent a positive turn in the pb(t) term of the debt dynamics equation. If PB surplus and a negative r-g differential occur together, the debt-to-GDP ratio would move toward improvement. Nonetheless, the increase in real yields to 1.190% raises the real burden of interest payments, and whether a PB surplus can offset that increase in interest costs is critical.
The narrowing 30Y-10Y spread (1.183%) indicates market restraint in pricing ultra-long fiscal risk premia, suggesting market participants do not view fiscal sustainability as an acute issue. Structural stabilizers — a current-account surplus and domestic holdings of 88% — appear to underpin fiscal confidence even amid rising yields.
Key items to monitor going forward are: the pace of BOJ policy normalization, realized nominal GDP growth, tax-revenue trends (notably elasticities of corporate and income taxes), and JGB supply-demand balance (the pace of decline in BOJ holdings versus private-sector absorption capacity). These factors will determine the direction of the r-g differential and the sustainability of interest-payment burdens. The transition to positive real yields implies higher fiscal costs, but it also signals economic normalization; whether growth can offset higher costs will be the decisive factor in future assessments of fiscal sustainability.
Yield curve: The curve showing the relationship between a bond's remaining maturity (tenor) and its yield. Normally upward-sloping with longer maturities yielding more, but it can invert during downturns when short-term rates exceed long-term rates.
Bear steepening: A steepening of the yield curve accompanied by rising yields (a bear market in bonds). Occurs when long-term yields rise more than short-term yields and can reflect recovery expectations or fiscal concerns.
Term spread: The difference between yields of bonds with different maturities. The 10Y-2Y spread is a leading indicator of the business cycle; the 30Y-10Y spread reflects ultra-long fiscal credibility and inflation expectations.
Real yield: The nominal yield minus expected inflation (or the actual inflation rate). It represents the real borrowing cost or the change in purchasing power of savings. Negative real yields indicate financial repression.
Financial repression: A state in which real yields are negative (nominal rates < inflation). Governments use low-rate policies to reduce the real burden of debt, while savers suffer real erosion of assets.
r-g differential: The gap between the effective interest rate on government debt (r) and nominal GDP growth (g). If r<g, the debt-to-GDP ratio can improve automatically; if r>g, it tends to worsen. It is a key indicator of fiscal sustainability.
Primary balance (PB): The government's balance of revenues minus expenditures excluding interest payments. A PB surplus indicates the fiscal position excluding interest is in balance or surplus.
BOJ quantitative tightening (QT): A policy in which the central bank reduces its holdings of assets such as government bonds. It is the reversal of quantitative easing (QE) and reduces liquidity supplied to the market.
Composite Index (CI): A composite economic indicator that synthesizes multiple economic series into leading, coincident, and lagging indices. Rising values indicate expansion; falling values indicate contraction.
BOJ Tankan: The Bank of Japan's quarterly short-term economic survey of enterprises. The business conditions DI (diffusion index of 'good' minus 'poor' responses) is a representative measure; a positive DI indicates more firms view conditions as favorable.
This column was automatically generated by AI integrating Ministry of Finance JGB interest rate data, tax revenue data, Bank of Japan statistics, and e-Stat public statistics as a fiscal analysis resource. This is not a recommendation to buy or sell any financial instruments or government bonds. Please make investment decisions at your own responsibility and consult professionals as needed.