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 stood at 3.49 percent on 25 December 2025, compared to 3.55 on 24 December.
Sample. The daily time series presented in the chart has 4,437 records in total. The series covers the time range going from November 2007 to December 2025.
History. Here are a few descriptive statistics calculated on the entire sample: the yield averaged 1.60 percent; it reached its highest level of 3.60 on 20 November 2025; it registered a minimum of 0.07 on 6 July 2016.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-12-23 | 3.552 |
| 2025-12-24 | 3.546 |
| 2025-12-25 | 3.489 |
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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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