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Metrics type: Supporting Metrics • Category: Cost & Efficiency

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At a glance

A 90-day sparkline of your average rated cost per Japan Post consignment, so you can see whether unit despatch cost is drifting up, holding flat, or stepping at a tariff change. This is the slow-moving margin signal that sits underneath the daily noise of Avg Shipping Cost.

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What it tracks

The card plots total Japan Post shipping spend divided by consignment count, sampled across the trailing 90 days. A smooth gentle slope usually reflects a shift in despatch mix (more EMS, more remote-prefecture Yu-Pack, heavier parcels); a sharp step almost always reflects a Japan Post tariff change, the annual Yu-Pack pricing review typically lands in March and can move whole prefecture-zone bands at once, and EMS rates are revised periodically too. Reading the trend over 90 days lets you separate a genuine cost-creep that needs a packaging or carrier-mix response from a one-month blip driven by a heavy-parcel promotion or a seasonal spike such as Oshogatsu (New Year) gifting. There is no alert on this card; it is a watch metric. For the spend geography behind the trend use Cost by Zone, and for the individual parcels distorting an upward month use High-Cost Shipment Outliers.

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Reconciling against the source

Cross-check the trend against your monthly Japan Post billing statements and the rated charges in the Yu-Pack Print / EMS despatch records, aligning to the same tariff period (billing is in JST); a step in the line usually maps to a published Japan Post price revision rather than a data issue. See Avg Shipping Cost for the period-over-period point reading.

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Tracked live in Vortex IQ Nerve Centre

Cost Per Shipment Trend is one of hundreds of KPI pulses Vortex IQ tracks across Japan Post and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. Start for free or book a demo to see this metric running on your own data.