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 4.01 percent on 13 August 2026, versus 3.99 on 12 August.
Sample. The daily time series shown in the graph has 4,589 data points. The series covers the time span stretching from November 2007 to August 2026.
History. Here are a few simple statistics we computed on the entire sample: the yield averaged 1.67 percent; it achieved a maximum of 4.04 on 19 May 2026; it hit a minimum of 0.07 on 6 July 2016.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-08-10 | 3.955 |
| 2026-08-12 | 3.987 |
| 2026-08-13 | 4.006 |
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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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