You have reached the anonymous limit of 3 requests/day

Issue an API key to resume at ¥3.30 per billable unit (tax inclusive). There is no minimum usage period and no cancellation penalty — a month you do not use is ¥0.

Upgrade path

Anonymous access is limited to 3 requests per day per IP and resets at the next JST day boundary.
Paid API keys use the same metered model described on Pricing.

Resume at ¥3.30 per billable unit — to the pricing page

Pay by Apple Pay / Google Pay / card via Stripe Checkout. Qualified invoices are issued automatically. To cancel, cancel the subscription from the Stripe Customer Portal. See Pricing.

Want to try it first?

You can try a 14-day / 200-request trial with no card. An API key is issued with just email verification — Stripe is not involved. See the trial page (no card, 14 days / 200 requests).

Try again tomorrow

The anonymous limit is managed by a daily JST window. When the date changes, the same IP / fingerprint can again use up to 3 requests/day for free. Check your remaining quota: GET /v1/usage.

Looking for the MCP device flow?

If you received a confirmation code (e.g., ABCD-1234) from a client such as Claude, go to /go.

This service is for information retrieval. Consult a qualified professional for individual, case-specific tax or legal determinations (Certified Public Tax Accountant Act §52 / Attorney Act §72).

For the live Japanese upgrade page, see the Japanese page. For English FDI examples, see jpcite for foreign-invested entities.