# What is Japan's Invoice System (インボイス制度)?

> Japan's Invoice System (インボイス制度) is the qualified-invoice regime that took effect on 1 October 2023. To claim a consumption-tax input credit, a business must hold a qualified invoice issued by a registered invoice issuer, showing that issuer's registration number and tax amounts by rate.

Last updated: 2026-09-29

- Japanese: インボイス制度 (いんぼいすせいど / Inboisu Seido)
- In English: Qualified Invoice System (also rendered: Japanese Consumption Tax qualified invoice regime, Invoice System)
- Governed by: Japan's National Tax Agency (国税庁), in force since 1 October 2023.

The Invoice System changed what an acceptable receipt looks like in Japan, which is why it appears as a checkbox in every domestic expense-tool comparison.

The mechanics that matter operationally: a qualified invoice must carry the issuer's registration number, and the buyer must retain it to claim the input credit. That puts two new burdens on expense processing — validating that a submitted receipt is a qualified invoice at all, and storing it in a way that survives audit.

Registration numbers follow a fixed shape: the letter T followed by a 13-digit number, which for a company is its existing corporate number. The National Tax Agency publishes a lookup site where any registration number can be checked against the registered issuer, so validation is something software can automate rather than a judgement call.

It also created a commercial wrinkle: suppliers who are not registered issuers cannot provide qualified invoices, so their customers lose the input credit on those purchases. A transitional measure phases this in: buyers could deduct 80% of the tax on purchases from non-registered suppliers from October 2023 to September 2026, and under the FY2026 tax reform the rate steps down to 70% from October 2026, 50% from October 2028 and 30% from October 2030, ending in September 2031 (National Tax Agency). Even so, vendor registration status is now a procurement question, not just an accounting one.

A point English-language searches often conflate: the Invoice System is not an e-invoicing mandate. It sets out what an invoice must contain, not what format it travels in, and a compliant qualified invoice can still be paper. Japan's structured e-invoicing effort is a separate, voluntary track — the Digital Agency maintains JP PINT, a Japanese specification built on the international Peppol network — and adopting it is a way to exchange invoice data machine-to-machine, not a legal obligation under the Invoice System.

For software selection, note that Invoice System support and Electronic Bookkeeping Act support are distinct capabilities and a product may have one without the other. Because the rules and transitional thresholds continue to evolve, verify a vendor's current handling directly rather than relying on a comparison table — including ours.

Sources: [1] https://www.nta.go.jp/taxes/shiraberu/zeimokubetsu/shohi/keigenzeiritsu/invoice.htm [2] https://www.nta.go.jp/taxes/shiraberu/zeimokubetsu/shohi/keigenzeiritsu/invoice-review/index.htm [3] https://www.nta.go.jp/taxes/shiraberu/zeimokubetsu/shohi/keigenzeiritsu/pdf/qa/113.pdf [4] https://www.invoice-kohyo.nta.go.jp/ [5] https://www.digital.go.jp/policies/electronic_invoice

## Related terms

- [Electronic Bookkeeping Act (電子帳簿保存法)](https://agent-door.com/glossary/denshi-chobo-hozon-ho)
- [Certified timestamp (認定タイムスタンプ)](https://agent-door.com/glossary/certified-timestamp)
- [Vendor evaluation](https://agent-door.com/glossary/vendor-evaluation)

## Related tool comparisons

- [Best invoice issuing & receiving tools](https://agent-door.com/tools/invoicing)

## Frequently asked questions

### Is Invoice System support the same as Electronic Bookkeeping Act support?

No. The Invoice System governs what makes an invoice valid for a consumption-tax credit; the Electronic Bookkeeping Act governs how records may be stored electronically. A tool can support one and not the other, so check them separately.

### Does Japan's Invoice System require e-invoicing?

No. The Invoice System governs what an invoice must contain, not the format it is exchanged in, and a paper qualified invoice remains valid. Structured e-invoicing in Japan is a separate voluntary track: the Digital Agency maintains JP PINT, a Japanese specification based on the international Peppol network. Adopting it is an efficiency choice, not a compliance requirement.

### What does a qualified invoice registration number look like, and how do I check one?

The letter T followed by a 13-digit number — for a company, its existing corporate number. The National Tax Agency runs a public lookup site that resolves a registration number to the registered issuer, so expense software can validate submitted invoices automatically instead of relying on a reviewer's judgement.

### What happens if a supplier is not a registered invoice issuer?

They cannot issue a qualified invoice, so the buyer cannot claim the full input credit on those purchases. A transitional measure softens this. Per the National Tax Agency, as revised by the FY2026 tax reform: 80% of the tax is deductible on purchases from October 2023 to September 2026, 70% from October 2026, 50% from October 2028, and 30% from October 2030 until the measure ends in September 2031. Because the rate steps down on a schedule, confirm the current figure with the National Tax Agency rather than a comparison table.

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