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 3.31 percent on 30 September 2025, versus 3.30 on 29 September 2025.
Sample. There are 4,378 records overall in the daily time series presented in the plot above. The period covered by the series is from November 2007 to September 2025.
History. Here's a peek at a few descriptive statistics we computed on the entire sample: the yield reached its highest level of 3.44 percent on 8 September 2025; it hit a trough of 0.07 on 6 July 2016; it had a mean value of 1.58.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-26 | 3.341 |
| 2025-09-29 | 3.303 |
| 2025-09-30 | 3.314 |
Hint. To simplify research, we categorize series into data sets and worksheets. If you navigate further down, you will discover how we structured further information related to the statistics found here.
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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) |