Support

jp-corporate-number · Operator: MK Career Planning

Contact (free): mk.career.planning@gmail.com

Before you write

• Lost a paid result? Call the free tool get_receipt with the receipt_id from the paid response (kept 30 days).
• Retried with the same payment? You are not charged twice; the stored result is returned.
• DAILY_CAP_REACHED / PAUSED / LEDGER_UNAVAILABLE? You were not charged. Try again later.

Please include your wallet address, the receipt_id or transaction hash, and the time (with time zone). We usually reply in English or Japanese within a few business days.

Data and deletion requests: see the Privacy Policy. Terms: Terms of Service.

This service relays information from the National Tax Agency Corporate Number System Web-API. Its answers are not guaranteed by the NTA, not an official government result, and not a decision on whether to trade with, lend to or contract with any party.