40-year yield on government bonds (percentage points; constant maturity; nominal) - Japan - Ministry of Finance - Daily
This series is part of the dataset: Japan constant-maturity government-bond yield curve (Ministry of Finance)
Download Full Dataset (.xlsx)Latest updates. In Japan, the 40-year government-bond yield was 3.33 percent on 24 September 2025, compared to 3.34 on 22 September 2025.
Sample. The daily series presented in the figure has 4,374 records. The period covered by the series stretches from November 2007 to September 2025.
History. Here’s a quick look at some summary statistics we computed on the entire sample: the yield averaged 1.58 percent; it reached its lowest level of 0.07 on 6 July 2016; it reached its highest level of 3.44 on 8 September 2025.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-19 | 3.32 |
| 2025-09-22 | 3.341 |
| 2025-09-24 | 3.327 |
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Series Metadata
| Field | Value |
|---|---|
| Description | 40-year yield; Japan government bond yield curve |
| Country | Japan |
| Economic concept | Interest rate |
| Data type | Semiannually compounded interest rate |
| Deflation method | Not applicable |
| Seasonally adjusted | No |
| Rescaling | None |
| Frequency | Daily |
| Unit | Percentage points |
| Source | Japan Ministry of Finance |
| Source type | National source |
| Data licence | Public Data Licence |
| Measure type | Interpolated level (constant maturity; cubic spline) |
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