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Mumu Labo Partner Program terms

Last updated: 2026-07-19 (7th edition)

These terms set out the conditions for participating in the Mumu Labo Partner Program (the “Program”), which covers the products operated by Mai Sato (trading as Mumu Labo; “we”, “us”) (the “Covered Products”). Everyone who participates in the Program (an “Affiliate”) is deemed to have agreed to these terms.

Article 1 (Definitions)

  1. “Referral link” and “referral code” mean the unique URL parameter (?ref=) or code we issue to identify an Affiliate.
  2. “Referred user” means a user (account) of a Covered Product determined to have been referred by that Affiliate under the attribution rules in Article 3.
  3. “Paid plan” means a pricing plan offered by a Covered Product for a fee. It does not include plans available free of charge (free plans) or free trial periods.
  4. “Recurring commission” means the commission we pay an Affiliate on a continuing basis for as long as the referred user keeps paying for a paid plan.
  5. “Release date” means the general availability date of each Covered Product. Where there is more than one Covered Product, the release date of each is used as its own reference point when applying the early rate (Article 4).
  6. “Pre-registration” means a user being added to our pre-registration list (announcement emails) via an Affiliate’s referral link on or before a Covered Product’s release date. To reconcile attribution, we may ask for identifying information for the account concerned (account ID, registered email address, and similar) at the time of pre-registration.

Article 2 (Registration)

  1. Anyone wishing to join the Program applies in the manner we specify; registration is complete upon our approval.
  2. We may decline to approve an applicant in any of the following cases:
    • They have previously breached these terms or a Covered Product’s terms of use
    • They are, or are connected with, organised crime groups or similar
    • The application contains false information
    • We otherwise judge participation to be inappropriate

Article 3 (How to refer, and how attribution is decided)

  1. An Affiliate may promote a Covered Product using the referral link or referral code we issued.
  2. Attribution of a referral — that is, which Affiliate a given paid charge counts towards — is decided in the following order of priority. Where a higher item settles attribution, the lower items do not apply.
    1. The user registered via our referral link (this includes an explicit referral code and carry-over by a valid cookie on the same device within 30 days).
    2. Where the preceding item does not settle attribution: a match between a user added to our pre-registration list (announcement emails) via our referral link on or before the release date and the user who actually registered (using the registered email address first, then identifying information such as the store domain).
    3. Where the preceding items do not settle attribution: the user stated in the survey at registration that they came through our referral (effective once the survey feature is available).
    4. Where the preceding items do not settle attribution: the Affiliate submitted a manual claim to us in writing within 30 days of the user’s registration date, and we accepted it as reasonable on the evidence.
  3. Where attribution to more than one Affiliate conflicts, we decide attribution on time-stamped evidence, and that decision is final.
  4. A registration that none of the items settles is not attributed to any Affiliate (organic).

Article 4 (Commission)

  1. We pay the Affiliate 20% (the “standard rate”) of the paid-plan fees the referred user actually paid (the total including the amount corresponding to consumption tax), as recurring commission, for as long as that user stays on a paid plan.
  2. Notwithstanding the preceding paragraph, where a pre-registered referred user subsequently subscribes to a paid plan, the rate applied to that referral is 30% (the “early rate”). The early rate is maintained for as long as that user stays on a paid plan.
  3. The early rate applies only to individual users pre-registered on or before the release date, with no cap on the number covered. The standard rate applies to referrals arising after the release date.
  4. Notwithstanding the preceding paragraphs, where an Affiliate promotes a product we newly developed based on that Affiliate’s own proposal, the rate for referrals of that product is 40% (the “proposal rate”). The proposal rate is maintained for as long as the referred user stays on a paid plan of that product. Where an Affiliate wants bespoke development of a proposed feature or product (commissioned work on a dedicated feature, and similar), we may discuss development costs separately.
  5. Commission accrues from the month in which the referred user finishes a free trial and the first charge for a paid plan is confirmed. Free plans and free trial periods are not eligible (this applies equally to the standard rate, the early rate, and the proposal rate).
  6. Notwithstanding the preceding paragraph, where attribution (Article 3) is settled after billing has begun — through a later survey response, a manual claim, or similar — commission accrues from the month in which a charge is confirmed after attribution was settled. We do not pay retroactively for months whose charges were already confirmed before attribution was settled.
  7. The rate applied to each referral is fixed at the time that referral is established and does not taper with time for as long as the contract continues. This does not preclude the changes provided for in Article 14.
  8. Where a referred user cancels a paid plan and the same user later subscribes to a paid plan again, the attribution and the applicable rate for that referral (including the early rate) are treated as continuing unchanged. In that case recurring commission restarts from the month in which a paid-plan charge is confirmed after re-subscription, and no commission accrues for the period during which cancellation meant there was no paid charge.
  9. Commission amounts are inclusive of the amount corresponding to consumption tax; we do not add consumption tax on top. Where withholding tax applies, we deduct it from the commission and remit it as required by law.
  10. For any month in which a referred user’s payment is refunded, charged back, or unpaid, the unpaid commission for that month is deducted from the confirmed balance. Amounts already paid are first set off against future commission, and we seek repayment under Article 5 only for any remainder that cannot be set off.

Article 5 (Invalid referrals and repayment)

  1. In any of the following cases no commission accrues for the referral concerned, and where it has already been paid the Affiliate shall repay it on our request:
    • The referred user’s payment was refunded, charged back, or unpaid (for that month)
    • The Affiliate referred an account operated by themselves or by a related party (self-referral)
    • The referral was obtained by improper means, false representation, unauthorised cashback to a third party, or similar
    • The referral was obtained in breach of these terms

Article 6 (Payment)

  1. Commission accounts close quarterly. Only where the confirmed balance at the quarter end is ¥5,000 or more do we transfer it, by the end of the following month, to the bank account the Affiliate nominates.
  2. Where the confirmed balance at the quarter end is under ¥5,000, that balance carries over to the next quarter.
  3. Transfer fees are borne by the Affiliate and may be deducted from the commission amount.
  4. The Affiliate shall accurately notify us of the account details needed for payment. We are not responsible for disadvantages arising from errors in the details notified.
  5. The Affiliate may raise an objection to a commission statement only within 30 days of the day they were notified of it.

Article 7 (Prohibited conduct)

In using the Program, an Affiliate shall not:

  1. Run search-linked advertising (listing ads) using the name of a Covered Product or any other trademark or brand name of ours or of Mumu Labo
  2. Solicit through spam email, indiscriminate direct messages, or other nuisance conduct
  3. Make false or misleading representations about the content or price of a Covered Product, or about the partnership itself
  4. Refer an account of their own or of a related party (self-referral)
  5. Offer coupons, cashback, or discounts without our approval
  6. Subscribe to a Covered Product on a referred user’s behalf, or re-invoice them for the fees (resale or agency contracting)
  7. Damage the credibility or brand value of us or of a Covered Product
  8. Act in breach of law or public order and morals
  9. Do anything else we judge to be inappropriate

Article 8 (Disclosure obligations)

  1. The Affiliate shall, on their own responsibility, disclose that an article, post, or similar containing a referral is advertising or promotion (for example “PR”), as required by the Act against Unjustifiable Premiums and Misleading Representations and other laws.
  2. Where an Affiliate’s published content contains statements that differ from the facts, we may request a correction, and the Affiliate shall correct it within 14 days of that notice. The same applies when the price or specification of a Covered Product changes.

Article 9 (Use of trademarks and materials)

  1. We grant the Affiliate a free licence to use the logos, images, screenshots, wording, and other materials we provide, within the purpose of the Program (promoting the Covered Products). The Affiliate may use these materials in content such as videos, articles, posts, and thumbnails, resizing or cropping them as the layout requires and adding their own commentary or captions.
  2. Notwithstanding the preceding paragraph, the Affiliate shall not alter logos or other brand materials in a way that damages their integrity, including changing colour, proportions, or typeface, or adding decoration. Nor shall they use the materials in a way that misleads as to the content or price of a Covered Product or as to the partnership.
  3. On termination of the Program, or at our request, the Affiliate shall promptly stop new use of the materials and delete or disable referral links. However, we do not require deletion of already published videos, articles, and similar; it is enough that such content does not represent a currently active partnership (including maintaining the disclosure under Article 8).

Article 9-2 (Content created by the Affiliate)

  1. The Affiliate grants us a free licence to use the articles, posts, images, videos, and other content they create in connection with the Program — including reproduction, public transmission, adaptation, and sub-licensing to third parties — within the purpose of promoting, advertising, and marketing the Covered Products and the Program, without restriction as to territory, period, or method.
  2. In exercising the licence in the preceding paragraph, we will not use the content in a manner that damages the Affiliate’s honour or credibility.

Article 10 (Confidentiality)

The Affiliate shall not disclose to any third party, without our prior consent, non-public information of ours learned in connection with the Program (including individual rates and conditions, and unreleased features or plans). This obligation survives for two years after the Program ends.

Article 11 (Handling of personal information)

  1. The information an Affiliate provides to us when referring is limited in principle to account identifying information (account ID, registered email address, and similar), the referral date, and the referral code. The Affiliate shall not send us personal information of referred users or other third parties.
  2. We use the information in the preceding paragraph solely for deciding attribution, calculating commission, and making payment.

Article 12 (Exclusion of organised crime groups)

The Affiliate represents and warrants that they are not, and have no connection with, organised crime groups or similar. In the event of a breach, we may cancel the registration without any notice and refuse to pay outstanding commission.

Article 13 (Term and termination)

  1. Participation in the Program runs for one year from the date registration is completed and renews automatically each year unless either party gives notice.
  2. Either we or the Affiliate may end participation by giving the other party 30 days’ notice.
  3. For referrals established on or before the termination date, we continue to pay commission on the existing conditions for as long as the referred user stays on a paid plan. This does not apply where termination is due to the Affiliate’s breach of these terms.

Article 14 (Changes to rates and to the Program, and its termination)

  1. We may change the commission rates or any other content of these terms where we judge it necessary. A rate change applies only to referrals arising on or after the change date; referrals already established as at the change date keep their existing rate.
  2. We may terminate the Program by giving the Affiliate 30 days’ notice. Even then, for referrals established on or before the termination date we continue to pay commission on the existing conditions for as long as the referred user stays on a paid plan.

Article 15 (Disclaimer and cap on liability)

  1. We do not guarantee that an Affiliate will earn any particular amount of commission or any particular result through the Program.
  2. Except in cases of our wilful misconduct or gross negligence, we are not liable for effects on the Program caused by the suspension, interruption, specification change, or discontinuation of a Covered Product.
  3. Except in cases of our wilful misconduct or gross negligence, our liability for damages in connection with the Program is capped at the total commission paid to that Affiliate over the preceding 12 months.

Article 15-2 (Damages caused by the Affiliate)

Where an Affiliate causes us loss by breaching these terms or through causes attributable to them, they are liable to compensate us for the loss incurred (including reasonable legal fees).

Article 16 (Notices)

Notices from us regarding the Program are given by email to the address the Affiliate registered, and are deemed to have arrived when sent. Notices from the Affiliate to us should be sent to [email protected].

Article 17 (Individual agreements)

We may separately conclude an individual agreement (including an individual terms sheet) with a particular Affiliate setting commission rates or other conditions that differ from these terms. In that case the individual agreement prevails over these terms for that Affiliate.

Article 18 (Edition and order of precedence)

The latest version published on this page is the authoritative text of these terms. Where a reproduction such as a printout or PDF differs from it, the text on this page prevails (except for individual agreements under Article 17).

Article 19 (Governing law and jurisdiction)

  1. These terms are governed by and construed under Japanese law.
  2. Any dispute concerning the Program is subject to the exclusive jurisdiction of the court having jurisdiction over our principal place of business.

Mai Sato (trading as Mumu Labo)
Established: 2026-07-10 / Revised: 2026-07-19 (7th edition)
7th edition (2026-07-19): added Article 9-2 (Content created by the Affiliate) — a free licence for us to use articles, videos, and similar created by an Affiliate within the purpose of promotion and marketing, together with a statement that we will not use it in a way that damages their honour or credibility. Added Article 15-2 (Damages caused by the Affiliate). Both were added as sub-numbered articles so the existing numbering (Articles 1 to 19) is unchanged.
6th edition (2026-07-19): Article 3 (attribution) was reorganised in full. The order of priority is (1) referral link — including an explicit referral code and carry-over by a valid cookie on the same device within 30 days — then (2) matching against the pre-registration list (registered email address, then store domain and similar), then (3) the survey at registration, then (4) a manual claim within 30 days of registration. It was made explicit that where a higher item settles attribution the lower items do not apply, and that a registration settled by none of them is not attributed to any Affiliate (organic). Article 4 was also made explicit about when commission starts where attribution is settled after billing began (a later survey response, a manual claim, and similar), clarifying that months whose charges were confirmed before attribution was settled are not paid retroactively. The notice address in Article 16 remains [email protected].
5th edition (2026-07-13): revised Article 9 (use of trademarks and materials). It now states that provided materials may be used normally within content such as videos, articles, and thumbnails (resizing, cropping, and adding one’s own commentary or captions), while prohibiting alterations that damage the integrity of logos and other brand materials. Obligations on termination were reorganised into “stop new use of the materials and delete or disable referral links”, clarifying that deletion of already published content is not required and that it is enough for it not to represent an active partnership (including maintaining the PR disclosure).
4th edition (2026-07-13): renamed to “Mumu Labo Partner Program terms” and widened the scope from a single specific product to the products we provide generally (the Covered Products). Wording on attribution and commission was unified into platform-independent terms (“user”, “registration”, and similar). Accordingly “release date” is defined as the general availability date of each Covered Product, and the early rate is applied against each product’s own release date (Article 1(5), Article 4). It was also made explicit in Article 4 that attribution and the applicable rate continue where the same user re-subscribes after cancelling.
3rd edition (2026-07-12): added the 40% proposal rate to Article 4, for the case where a product developed from a proposal is promoted by the person who proposed it.
2nd edition: clarified the order of priority for attribution, unified the payment conditions, and added the articles on disclosure obligations, use of materials, confidentiality, personal information, exclusion of organised crime groups, term, cap on liability, notices, and order of precedence between editions.