Trace

Carrier tracking

Japan Post tracking API

Japan Post is a domestic carrier serving JP routes. Trace accepts the Japan Post carrier code (japanpost) and returns a normalized tracking timeline when a source provides usable data.

Use the Trace package tracking API to track Japan Post shipments without integrating directly with Japan Post's own systems. Send a tracking number, and Trace detects the carrier automatically where possible or accepts the code explicitly.

Carrier type

domestic

Regions

JP

Carrier code

japanpost

Track Japan Post in one request

Automatic detection covers selected number formats. For ambiguous or unlisted formats, send the carrier code explicitly (japanpost); a listed code does not guarantee live events. Send a tracking number to the Trace API and receive a normalized event timeline.

curl -X POST https://api.traceapi.dev/v1/track \
  -H "Authorization: Bearer trc_test_key" \
  -H "Content-Type: application/json" \
  -d '{"tracking_number":"YOUR_TRACKING_NUMBER"}'

Japan Post tracking FAQ

Does Trace support Japan Post tracking?

Yes. Trace accepts the japanpost carrier code and returns a normalized event timeline for Japan Post shipments when a source provides usable data.

How do I track Japan Post packages with Trace?

Send a POST request to /v1/track with the tracking number and, for ambiguous formats, the carrier code japanpost. Trace returns normalized statuses and dated events with timestamps and locations.

Is Japan Post detected automatically?

Automatic detection covers selected number formats. For ambiguous or unlisted formats, send the carrier code explicitly (japanpost); a listed code does not guarantee live events.

Start tracking Japan Post for free.

Create an account, generate an API key, and track your first Japan Post package in under two minutes.

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