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Legal Notice under the Act on Specified Commercial Transactions

Last updated: October 1, 2026

This is an English translation. The Japanese version prevails.

Seller and responsible person

Disclosed by email without delay upon request.

Address and phone number

Disclosed by email without delay upon request.

Contact

[email protected]

Prices

7-day trial: ¥500 (one-time payment; does not renew)
Katana Pro (monthly plan): ¥3,000 per month (renews automatically every month)
Additional AI usage: ¥1,000 each (monthly plan subscribers who have used up their limit only; one-time payment)

The displayed price is the total amount you pay.

Other charges

Internet connection and data charges needed to use the service are borne by the customer.

Payment method

Credit card (processed by Stripe)

Payment timing

7-day trial: paid once when you sign up.
Monthly plan: the first month is paid when you sign up, then automatically on each monthly renewal date.
Additional AI usage: paid once when you buy it.

What you get and when

Access to "Search with AI" (condition generation and judgments based on the text of annual securities reports), available right after the payment is confirmed.

Each plan has a usage limit per period, shown on screen as a percentage remaining. Once the limit is reached, AI features are unavailable for the rest of that period. Unused usage does not carry over.

7-day trial: 7 days from sign-up. One trial per account.
Monthly plan: billing periods of one month from the sign-up date.
Additional AI usage: adds 50% of the monthly plan's usage limit for one month. It is valid for 90 days from purchase. Within that period, you can keep using it after cancelling the monthly plan.

Cancellation

You can cancel the monthly plan at any time from "Plans" → "Manage subscription". After cancelling, you can keep using it until the end of the period you have paid for, and no further charges occur. The 7-day trial does not renew, so no cancellation is needed.

Refunds

Because this is a digital service, purchases are not refundable, and cancelling the monthly plan mid-period does not give a prorated refund. If you are charged twice, or could not use the service because of a problem on our side, please contact us and we will handle it individually.

Supported environment

Current versions of major web browsers (Google Chrome, Safari, Microsoft Edge, Firefox).