This is an English translation for reference. The Japanese version is the official text. If the two differ, the Japanese version prevails. Japanese version: 特定商取引法に基づく表示
Legal notice (Act on Specified Commercial Transactions)
Version: 5th edition (first established: October 11, 2026)
Revised: November 4, 2026
Effective: November 4, 2026
| Item | Details |
|---|---|
| Service provider | Keigo Kawahara (the KUBOMI operator (the “operator”), run by an individual). The operator provides the Service. |
| Address | 〒160-0022 東京都新宿区新宿1-36-2 新宿第七葉山ビル 3F This address is for receiving mail. There is no reception desk for visitors. Please address mail to “KUBOMI”. For the types of mail that cannot be received and similar details, see Privacy Policy, Article 1, paragraph 2. |
| Phone number | If you request it, the operator will provide it by email without delay, in time for you to decide whether to subscribe (if you would like it in writing, the operator will provide it in writing). See “Requesting the phone number” below. |
| Contact | Contact for the Service: contact form (https://kubomi.app/en/#/contact) Please read the explanation above the send button, check “I agree to the handling above”, and then send your inquiry. |
| Merchant of Record | Link (Sold through Link, LLC; US; an affiliate of Stripe, Inc.). Billing, payment processing, and receipt of fees for paid plans are done by Link as the Merchant of Record. The operator provides the Service. Link’s terms of use and other rules apply to the payment process. |
| Service name and description | KUBOMI (https://kubomi.app ; the “Service”). A web service that automatically mixes and masters audio files of vocals and backing tracks. |
| Price | Free plan (FREE): $0 KUBOMI PRO Lite: $9.99 monthly / $99 yearly (paid once for the whole year) KUBOMI PRO: $24.99 monthly / $249 yearly (paid once for the whole year) Fees are in US dollars (USD). Depending on the country or region where you live, consumption tax and other taxes may be added and shown at checkout. For customers who live in Japan, we currently do not add Japanese consumption tax at checkout (you pay the amount shown). The amount you pay may be charged after conversion to Japanese yen. We do not sell songs one at a time. |
| Other fees besides the price | Internet connection fees. Consumption tax and other taxes (if you live outside Japan, these may be added at checkout depending on the country or region. For customers who live in Japan, we currently do not add them). Depending on the payment currency and the location of the payment provider, foreign transaction fees or currency conversion fees set by your card issuer or other provider may apply (including payments from Japan). |
| Quantity (what you get) | • Making a new song: On the Free plan, up to 3 songs per month per person. Up to 10 songs per month on KUBOMI PRO Lite, and up to 35 songs per month on KUBOMI PRO. Songs are counted again on the 1st of each month (JST), and unused songs do not carry over. The same applies to yearly plans. If you subscribe partway through a month, the cap for that month is not reduced. Rebuilds are not counted toward the number of songs. Deleting a song does not reduce the number of songs made. If processing fails with an error and the song is not completed, it is not counted. Songs made in the trial without signing in (once (1 song) per person only; you cannot download) and moved to your account when you sign in are not counted either. • Rebuilds: up to 10 times per song while on the Free plan. While on a paid plan, the number of rebuilds is not capped. • Downloads: on paid plans, 4 formats: WAV (48 kHz / 24-bit), WAV (48 kHz / 16-bit), WAV (44.1 kHz / 16-bit), and MP3 (320 kbps). On the Free plan, MP3 (320 kbps). Songs that had been made downloadable up to WAV before the change can still be downloaded in all formats, as before. A version in which the ranges fixed for volume and left-right position on the waveform page come to more than 30 seconds in total cannot be downloaded, including as MP3, on a plan that cannot use the part over 30 seconds. • Volume and left-right position (PAN) on the waveform: if the ranges you fixed come to 30 seconds in total or less, you can save the fixes, apply them to the song, and download that version on every plan. The part over 30 seconds is for PRO. For a Lite billing period that started before October 22, 2026, you can also use the part over 30 seconds until the end of that period. • Song storage: on paid plans, kept for 30 days after making. On the Free plan, kept for 7 days after making. • Files you can upload for 1 song: up to 24 files, up to 200 MB per file, and up to 1,500 MB in total |
| Contract period and automatic renewal | Monthly plans renew every month, and yearly plans every year. Unless you cancel your plan, the plan renews automatically on the same conditions, and you pay the fee at each renewal. The next renewal time is the date and time of the next charge managed by Stripe, and is shown on your account page. If your next renewal payment will be yearly, the operator will inform you by email within 24 hours from the point 14 days before the renewal time. If the operator makes a price increase, the new price applies only from the payment at the renewal time, and the operator will inform you by email and on screen at least 30 days before (for monthly) or 60 days before (for yearly) the renewal time at which the new price applies (an increase is within 50% of the price before the change and no more than once in 12 months. A price change beyond this applies only if you agree to it). If you cancel your plan before the new price applies, you can use the plan at the price before the change until the end of the period you paid for. |
| Payment methods | Methods you can choose on the Stripe payment screen (credit card, debit card, Apple Pay, Google Pay, Link). Your card statement may show a name starting with “LINK.COM*”. |
| When you pay | When you subscribe, you pay for the first billing period (1 month or 1 year). After that, you are charged automatically by your registered payment method at each renewal time. For an immediate change (see “Changing plans” below), you pay the amount at the time of the change (Terms of Service, Article 13 and the Appendix). |
| When the service starts | You can use the Service immediately once payment is complete. |
| Changing plans | A change to PRO or from monthly to yearly that includes neither a change from PRO to Lite nor a change from yearly to monthly (an immediate change) applies from the time the change process is complete. If you change to PRO without changing the billing unit, you pay the difference in fees for the remaining period at that time. If you change from monthly to yearly, you pay the yearly fee minus the remaining part of your current billing period at that time, and a new 1-year billing period starts from the time of the change. A change that includes a change from PRO to Lite or a change from yearly to monthly (a booked change) applies from the next renewal time, and we do not refund the difference. For all combinations, see the Appendix to the Terms of Service. |
| Canceling your plan | You can cancel your plan from your account page at any time. You can also do this from your Link account (link.com). Canceling your plan stops future automatic renewals, and if you complete it before the renewal time shown on your account page, you will not be charged the next time. You can use the plan until the end of the period you paid for. We do not refund fees for the remaining period (this also applies if you cancel a yearly plan partway through). |
| Refunds | For your first payment when you newly subscribe to a paid plan (both monthly and yearly), if it is within 7 days (168 hours) of payment and there has been no download (a file sent all the way to the end) at all after payment, we will refund the full amount when you apply through “Ask for the 7-day refund” on your account page (this includes amounts you paid for an immediate change made during these 7 days). Downloads on the Free plan before payment are not counted; after payment, downloads of songs made while you were on the Free plan are also counted. This refund is limited to once per person (this is checked using the records kept while the account exists and for 2 years from the date you delete your account; Terms of Service, Article 6). Payments by automatic renewal are not covered. In other cases, we do not refund fees, except in the cases set out in Terms of Service, Article 16 (such as when you could not use the Service due to a cause on the operator’s side, when the Service ends, and rescission of an order by a minor). This notice and the Terms of Service do not limit your right to terminate or rescind the contract under applicable law, or to receive a refund that comes with it. Under its own policy, Link may accept refund requests within 60 days of payment in certain circumstances, and this is a separate system from the refunds above. |
| Deleting your account | You can delete your account from your account page at any time. If you are in a paid plan billing period, automatic renewal stops at the time of your request, and your account and songs are deleted at the end of the billing period. You can keep using the Service until the end of the period. We do not refund fees for the remaining period. |
| Special conditions | Each person may have only one Free plan account. The following acts are prohibited, and if you break these rules, the operator may limit features, stop or delete audio files and songs, suspend your account, or take other measures (Terms of Service, Articles 18, 19, and 22). • Registering several Free plan accounts as one person • Sharing an account among several people, or letting others use your sign-in link or signed-in device • Saving the audio played on screen by using browser features, outside tools, or similar, and using it instead of downloading • Uploading audio files without permission from the rights holder (such as backing tracks for covers (“utattemita”)), or another person’s vocals without consent from the person whose vocals are included • Continuously uploading audio files automatically by programs or similar Except for the trial without signing in, you need to sign in with an email address or a Google account to use the Service. |
| System requirements | The latest version of a browser on a computer or smartphone (Chrome, Safari, Edge, etc.). Please turn on JavaScript and cookies. You need an email address that can receive sign-in emails (except for the trial without signing in). |
| Receipts | A receipt is sent by email after payment by Link (Sold through Link, LLC), the Merchant of Record. If you need an invoice in the operator's name, please contact us through the contact form. |
Requesting the phone number
- If you request the phone number, the operator will tell you by email without delay, in time for you to decide whether to subscribe (if you would like it in writing, the operator will provide it in writing).
- Please send your request through the contact form below. Using the subject “Request for the phone number” helps the operator handle it smoothly, but the operator answers every request, whatever the subject or wording. People who do not use the Service can also make a request.
- If the form is difficult for you, you can make a request by sending a letter by post to the address above. In the letter, please write where to send the answer (an email address or a postal address). The way to send it by post is as set out in Privacy Policy, Article 8, paragraph 2.
- There is no charge.
Contact for the Service: contact form (https://kubomi.app/en/#/contact)
Please read the explanation above the send button, check “I agree to the handling above”, and then send your inquiry.
For details, see the Terms of Service, the Privacy Policy, and Pricing.
The text of the 2nd edition (effective October 22, 2026) is the 2nd edition.