Official Result (MOF)
| Auction Date | 2026-08-06 |
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| Issue Date | 2026-08-07 |
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| Issue | JGB (30-Year) No. 91（reopen） |
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| Coupon (%) | 4% |
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| Maturity | 2056-06-20 |
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| Method | price conventional |
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| Offering | ¥600B |
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| Competitive Bids | ¥1.8T |
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| Accepted Amount | ¥455.8B |
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| Lowest Accepted Price | 100.65（3.952%） |
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| Weighted Avg Price | 100.86（3.937%） |
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| Allotment Ratio | 48.9473% |
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| Non-competitive I | ¥143.4B |
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| Non-competitive II | — |
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Source: https://www.mof.go.jp/jgbs/auction/calendar/nyusatsu/resul20260806.htm
Offering Terms (from MOF notice) documents →
| Official name | 利付国庫債券（30年）（第91回） |
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| Legal basis | 財政法（昭和22年法律第34号）第4条第1項及び特別会計に関する法律（平成19年法律第23号）第46条第1項 |
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| Coupon dates | 毎年6月20日及び12月20日 |
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| Planned amount | ¥600B |
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| Bid deadline | 2026-08-06 11:50 |
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| Payment date | 2026-08-07 |
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| Non-competitive II | held |
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| Price terms | — |
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Derived Metrics calc auction-v1 / auction-v2
| This | Prev | avg (12) | min | max | z |
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| Bid/Cover | 3.86 | 4.55 | 3.49 | 2.94 | 4.55 | +0.87 |
| Tail (sen) | 21 | 4 | 17 | 4 | 38 | +0.45 |
| Non-competitive take-up | 23.9% | 24.1% | |
| Grade | C (score +0.21) | (z(B/C) − z(tail))/2 bucketed A(≥1)/B(≥0.3)/C/D(≤−0.3)/E(≤−1), vs last 12 same-tenor |
| Yield tail (bp) | 1.5 | 0.3 |
Same-tenor Auction History