> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Japan Post (EMS / Yu-Pack) audit profile, Vortex IQ

> What the Vortex IQ Japan Post (EMS / Yu-Pack) health audit checks: Japan Post: EMS Corridor SLA, Yu-Pack Domestic OTD, Cool-Chain Integrity & Customs Auto-Gen

**[Nerve Centre KPIs](/nerve-centre/kpi-cards/japan-post) · [Audit Profile](/nerve-centre/kpi-cards/japan-post/audit) · [Sentiment Settings](/nerve-centre/kpi-cards/japan-post/sentiment)**

Japan Post serves Japanese merchants shipping domestic Yu-Pack and international EMS (Express Mail Service), plus the distinctive Cool Yu-Pack (chilled / frozen) supply chain. Auth is api\_key against the limited public EMS tracking surface; domestic Yu-Pack endpoints require a Yu-Pack Business contract and partner onboarding. Findings either cost a customer (EMS corridor SLA miss, Yu-Pack same-day-Tokyo slip), stall an export (CN23 customs auto-gen failure leaving parcels at JP export customs), or destroy product (Cool Yu-Pack temperature-track gap). Cross-references commerce siblings via order\_ref / tracking\_number for JP-domestic OTD and revenue-at-risk attribution.

## What this audit checks

### Authentication & access

* EMS tracking api\_key still authenticates against /services/tracking (no 401 / invalid-key)
* Yu-Pack Business contract number maps to an active domestic shipping account (no 'unknown contract')
* Customer code (お客様コード) resolves and is accepted on /services/shipping
* Tracking API error / 5xx rate > 5% in last 1h (Japan Post upstream availability)

### On-time delivery & transit

* EMS OTD per destination corridor (JP->US/EU/AU/Asia) below corridor SLA - North America 3-5d, Europe 5-7d, Asia 2-4d
* Yu-Pack same-day Tokyo metro OTD \< 90% (pre-12:00-noon same-day promise)
* Yu-Pack next-day prefectural OTD below target
* Avg transit days per service\_type drifting above prior-period baseline (actual\_delivery - created\_at)

### Exceptions & failed deliveries

* Shipment exception rate > 3% rolling 30D (status = Exception across Yu-Pack + EMS)
* EMS shipments stuck in AwaitingCustoms > 2 days (JP export-customs hold)
* AttemptedDelivery events not converting to Delivered (repeat redelivery / 不在 re-attempt loop)
* ReturnedToSender rate per service\_type above threshold

### Damaged / lost parcels

* Lost-parcel rate (status = Lost) > damaged\_rate threshold rolling 90D
* Damaged-parcel rate elevated on Cool Yu-Pack / Frozen vs ambient Yu-Pack
* Declared-value (declared\_value\_jpy on CN23) exposure on lost international EMS shipments
* Cool Yu-Pack temperature-track gaps > 0 in last 24h (chilled/frozen line break = perishable product risk, P0)

### Tracking data completeness

* Tracking-event gap > 24h on domestic Yu-Pack OR > 5d on EMS\_International (no occurred\_at progression)
* Shipments with no TrackingEvent linked to tracking\_number after acceptance
* CN23 customs-document auto-generation failure rate > 2% (status = Rejected or generation error)
* Missing to\_country\_code / to\_prefecture on shipments breaking corridor and zone attribution

### Cross-channel fulfilment SLA

* Cross-channel: JP ecom order has no Japan Post shipment after 48h (dispatch-SLA breach -> revenue at risk per channel)
* Cross-channel: actual\_delivery > expected\_delivery joined to commerce\_sibling.order.total (late-delivery refund propensity)
* Cross-channel: EMS stuck AwaitingCustoms joined to sibling order -> proactive commercial-invoice / customs-doc fix candidates
* Cross-channel: ReturnedToSender by service\_type joined to sibling orders -> return-cost attribution

## Severity thresholds

| Signal                      | Warn | Critical |
| --------------------------- | ---- | -------- |
| `on_time_delivery_rate`     | 90   | 85       |
| `exception_rate`            | 2    | 3        |
| `avg_transit_days`          | 5    | 7        |
| `damaged_rate`              | 0.5  | 1        |
| `tracking_gap_pct`          | 5    | 10       |
| `customs_doc_failure_pct`   | 1    | 2        |
| `awaiting_customs_days`     | 1    | 2        |
| `cool_yupack_temp_gaps_24h` | 0    | 1        |
| `returned_to_sender_pct`    | 5    | 8        |
| `api_error_rate`            | 2    | 5        |
| `auth_token_failures_24h`   | 1    | 5        |

## Data sources

* `GET https://trackings.post.japanpost.jp/services/tracking` - Tracking events per tracking\_number (EMS public surface + domestic where licensed)
* `POST https://trackings.post.japanpost.jp/services/shipping` - Shipment creation / Yu-Pack domestic dispatch (write-side, partner-gated)
* `POST https://trackings.post.japanpost.jp/services/customs` - EMS CN23 customs declaration generation (international export)