RECOVERY SUMMARY Three cable consortia drew down emergency restoration capacity on 41 days when no cable failed. The quantum was identical in all three ledgers: 31.447. The requesting party field was present in every entry, and empty.
EXTRACTED DATA Japan's Ministry of Internal Affairs and Communications approved a draft framework for international submarine cable protection at the sixth meeting of its study group on 2026-06-10. Measures under review: diversification of landing sites, route redundancy, domestic repair-vessel capacity. Final report issued mid-July 2026.
Restoration capacity is contractual. Operators pre-commit spare bandwidth on systems they do not own, to be released when a neighbouring cable is cut. Drawdown requires a restoration request: a signed instruction naming the requesting party, the failed segment, and the expected duration. The mechanism is audited quarterly. It is not automatic.
PSRA-3 ledger, trans-Pacific pool, 2026-01-04 through 2026-07-18. Restoration drawdowns recorded on 41 days. Cable faults on the covered systems during the same period: 3. The 3 fault-linked drawdowns carry complete request records. The remaining 38 do not.
Each of the 38 entries records the same drawn quantum: 31.447 Gbit/s. Each records a hold of 47 minutes. Each records full return of capacity at the close of the hold, reconciled to the committed baseline with a residual of 0.000.
Nordkap Kabel AS, North Sea restoration schedule, same period. Ledger unit is percentage of committed reserve, not bandwidth. Drawdowns on 38 days. Value in every entry: 31.447% of committed reserve. Hold: 47 minutes. Return: complete.
Sunda Link Consortium, Java–Singapore corridor. Ledger unit is internal restoration units, a consortium-specific scalar with no bandwidth equivalent published. Drawdowns on 38 days. Value in every entry: 31.447. Hold: 47 minutes.
The three consortia share no landing station, no supplier, no clearing house, and no auditor. Contract templates differ. Reporting currencies differ. Ledger software: Oracle-based, SAP-based, and a spreadsheet under version control in a private repository.
Traffic telemetry was pulled for the borrowed segments across all 38 holds. Utilisation on the drawn capacity during the hold windows: 0.00%. The capacity was reserved, held for 47 minutes, and released. No packets traversed it.
Quarterly audits were performed by three unrelated firms: Halvorsen Marine Assurance, Bergquist & Co, and an internal audit function at the Sunda member operator. All three signed off. Two auditors flagged the 38 entries as immaterial variance. The third did not flag them.
Change-control records for the ledger schemas were reviewed for the preceding 24 months. Schema modifications: 0. Field-validation rule changes: 0. Access logs show no administrative writes to the affected tables outside the recorded submissions.
The 38 dates match across all three ledgers. First entry: 2026-01-11. Last entry: 2026-07-18. Interval distribution is irregular — gaps of 2 to 11 days, no weekly or monthly period detected at 180-day resolution.
The requesting party field is mandatory in all three schemas. In the 38 entries it is populated. String length: 0. Schema validation on all three systems rejects null in this field. It does not reject an empty string. Validation passed on submission in every case.
Audit reconciliation for Q1 and Q2 2026 closed without exception on all three ledgers. Capacity returned equals capacity drawn. Billing impact: none. Customer-visible impact: none.
TeleGeography's published fault record for the covered systems lists 3 events in the period. ICPC advisories for the same corridors: 3. No fourth event is recorded by any external body.
Repair vessels chartered against the 38 entries: 0. Vessel-day consumption logged: 0. Spare cable drawn from depot: 0 m.
A fourth pool covering the eastern Mediterranean was examined for the same period. Drawdowns outside recorded faults: 0. Its schema differs in one respect from the other three: a drawdown is written only after a countersignature from a second member operator. Single-party writes to the restoration table are rejected at the database layer.
Committed reserve across the three affected pools totals 4,812 Gbit/s, 2,190 Gbit/s, and an undisclosed figure. Against the two disclosed baselines, 31.447 Gbit/s represents 0.65% and 1.44%. The quantum does not scale with pool size.
Restoration event: recorded. Restoration request: not recorded. Manual intervention: not required. Manual intervention: not requested.
INTEGRITY NOTES Integrity check: passed. All parameters nominal. Cross-indexing of the three ledgers returned matching key markers. Flagged as nominal variance. Error rate: 0.000. No further notes.
SOURCE ANCHOR The Japan Times: Japan lays the groundwork for submarine cable resilience Submarine Networks: Japan MIC approves draft framework to strengthen international submarine cable infrastructure Telecompaper: Japan consults on measures to strengthen submarine cables protection
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