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, versus 3.34 on 22 September 2025.
Sample. This daily series has 4,374 records overall. The period covered by the series goes from November 2007 to September 2025.
History. Here’s a quick look at a few statistics we calculated on the entire sample: the yield had a mean of 1.58 percent; it reached a maximum of 3.44 on 8 September 2025; it hit a minimum of 0.07 on 6 July 2016.
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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