Japan MSCA app store rules: the distribution opening to watch

If you run distribution for a game with any kind of Japanese audience, the most consequential regulatory change of the last twelve months probably isn’t the one you’ve been tracking. While most studios outside the EU were watching the Digital Markets Act play out in Europe, Japan quietly built and switched on its own version: the Mobile Software Competition Act (MSCA), formally the Act on the Promotion of Competition for Specified Smartphone Software. It entered into force on 18 December 2025, and it does for Japan roughly what the DMA did for Europe — it forces Apple and Google to allow third-party app stores, alternative payments, and alternative browser engines on iOS and Android.

That makes the Japan MSCA app store opening the first major non-EU shift of this magnitude, and it lands in one of the highest-ARPU mobile markets on the planet. If you’ve been treating Japan alternative app distribution as a 2028 problem, this is the snapshot we’d give you over a coffee: what the law actually mandates, why Japan specifically is worth the integration work, and what the economics look like now that the fee cards are public.

What the MSCA actually mandates

The MSCA is an ex-ante regime, not a one-off antitrust case. Rather than litigating each abuse after the fact, Japan’s Fair Trade Commission (the JFTC) designated the gatekeepers in advance and imposed standing obligations on them. In March 2025 the JFTC named Apple Inc., its Japanese subsidiary iTunes K.K., and Google LLC as “specified software providers” — covering their operating systems, app stores, browsers, and in Google’s case search. Detailed implementation guidelines followed in July 2025, and the operative obligations took effect on 18 December 2025.

The core requirements will look familiar if you’ve read the DMA. Designated operators must allow third-party app marketplaces and sideloading; permit alternative payment systems and external purchase links (no more anti-steering); allow alternative browser engines instead of forcing WebKit; stop self-preferencing their own services; and provide certain data access and interoperability. Users can set a third-party marketplace as their default. The enforcement teeth are real: according to the JFTC, violations can draw fines of up to 20% of the relevant domestic turnover, rising to 30% for repeat infringers — a formula deliberately heavy enough to make compliance the cheaper option.

The practical upshot for a studio is that, for the first time, distributing to Japanese iPhone and Android users no longer has to route exclusively through the App Store and Google Play. That’s the same structural unlock we mapped across the industry in our state of alternative app stores in 2026 — now extended to a second major jurisdiction.

Why Japan specifically is worth the work

Japan is not a market you open “for completeness” — it’s one of the most valuable mobile audiences in the world per player. Newzoo’s 2025 study with Ukie puts Japanese players at just 2.2% of the global player base while generating 9.1% of global games revenue — an average of $223 per player per year. That gap between revenue share and audience share is the single clearest signal of ARPU. On the mobile side specifically, Sensor Tower put Japan at around $11 billion of App Store and Google Play in-app-purchase revenue over the twelve months to July 2025, the second-largest total in Asia behind only China’s iOS market.

In plain terms: a Japanese payer is, on average, worth a multiple of a payer in most Western markets. When a market like that opens up new distribution surfaces and reduced commissions simultaneously, the math on integration work changes. Saving even a few points of commission on high-ARPU revenue, or reaching a cohort through a channel your competitors haven’t integrated yet, compounds faster in Japan than almost anywhere else. The market is mature and slightly contracting — that $11 billion was down 2.2% on the prior twelve months — which means share gains increasingly come from distribution and monetisation efficiency rather than raw audience growth, exactly the lever the MSCA hands you.

MSCA vs the EU DMA: same shape, local accent

Structurally the two regimes rhyme; operationally they diverge in ways that matter for your build. Both designate gatekeepers ex ante, both force open third-party stores and payments, both ban self-preferencing and anti-steering, and both carry revenue-based penalties. If you already built EU-compliant alternative-distribution infrastructure for the DMA, a large fraction of that work — alternative billing flows, external purchase links, marketplace submission tooling — is conceptually portable to Japan.

But it isn’t copy-paste. The JFTC’s guidelines, the designation scope, and crucially the fee cards Apple and Google have published for Japan are Japan-specific. The approval process for alternative marketplaces is gated by Apple on its own terms, just as in the EU, but the thresholds and commercial terms differ. Local content rules, age-rating conventions, and payment preferences (Japanese consumers lean heavily on carrier billing and convenience-store-adjacent methods, not just cards) shape what actually converts. Treat your EU integration as a template, not a finished product — that distinction is the difference between a clean Japan launch and a stalled one.

The economics: what the fee cards say

The most concrete change is on commission, and the numbers are now public. On the iOS side, Apple’s Japan terms introduce a reduced and genuinely unbundled structure. App Store commission on digital goods and services drops to 21%, from the old 30% — and that 21% applies whether you use Apple In-App Purchase or an alternative in-app payment processor. Apple’s payment processing is now a separate 5% fee charged only when you use Apple In-App Purchase, so the all-in rate is 26% through Apple’s rails or 21% through your own. Small Business Program, Video Partner Program and Mini Apps Partner Program participants, and subscriptions after their first year, pay 10%. Link out to a website instead and you pay a 15% store services commission on sales made within seven days of the tap, or 10% for those same programme participants. Apps distributed through an approved alternative marketplace pay a 5% Core Technology Commission (CTC) on sales instead of standard commission.

That fee architecture is the same trap and opportunity we broke down in what the Core Technology Fee actually costs a studio: per-unit or percentage technology fees reward high-ARPU titles and can punish high-install, low-monetisation ones. Japan’s high ARPU tilts that math in favour of more titles than the EU version does — but you still have to model it against your own funnel, not the headline rate.

On Android, Google’s changes lean toward payment flexibility rather than a tiered store fee. Google extended its User Choice Billing programme, previously limited to non-gaming apps in Japan, to all apps offering in-app purchases of digital content, and launched a separate external payments programme that games are explicitly eligible for. Enrolled apps must offer the external payment link side by side with Google Play Billing. The fees on those external transactions are 10% for auto-renewing subscriptions, 10% within an eligible developer’s first $1M of annual earnings, and 20% on all other in-app digital content — well short of the full 30%. The net is that even if you never ship a third-party Android store, you can recover margin on Japanese transactions through alternative billing alone. For the Android-OEM storefront angle specifically, our OEM app stores comparison covers how Galaxy Store, GetApps and AppGallery terms stack up against this. If a Japan OEM preload deal is the goal, our OEM preload deal playbook covers the deal structures and BD process.

One Japan-specific lever deserves a flag: carrier billing. NTT docomo, au (KDDI) and SoftBank give Japan unusually deep direct-carrier-billing rails, and the MSCA’s payment opening makes it easier to plug those in as a first-class checkout. We map where carrier billing pays off market by market in our 2026 carrier billing reach map; Japan is one of the few high-income markets where it’s a conversion lever rather than a fallback.

An operational playbook for Japan

The publishers who get the most out of the MSCA treat Japan as a deliberate channel decision, not a checkbox. A pragmatic sequence looks like this:

1. Audit your Japan revenue mix first. If a meaningful share of your monetisation already comes from Japanese payers, alternative billing alone — staying on the App Store and Google Play but steering to external payment — is the fastest, lowest-risk margin win. Do this before you consider a third-party store.
2. Reuse your EU stack as a template. If you built DMA-compliant alternative billing or marketplace tooling, port the architecture, then adapt the fee modelling and submission specifics to Japan’s cards.
3. Model the fee tiers against your actual ARPU. The reduced commission and the 5% Core Technology Commission interact differently for a $2-ARPDAU title than a $0.10 one. Run your own break-even before committing to a marketplace — the developer guide to Onside’s EU and Japan marketplace works one of those stacks through end to end.
4. Make carrier billing a first-class option. In Japan it materially affects conversion. Treat docomo / au / SoftBank DCB as core checkout, not an afterthought.
5. Map the local-compliance surface early. Age ratings, content conventions, and the JFTC’s annual reporting expectations are predictable if you map them before submission, painful if discovered after.

If operational bandwidth is the constraint — and for most teams a new jurisdiction is exactly that — the sequencing follows the same logic as any multi-channel distribution stack: alternative billing first, carrier billing second, third-party stores once both are proven. It’s the kind of build we run with studios through our distribution practice.

What to watch next

The MSCA’s real significance is that it proves the DMA wasn’t a European one-off — and it sets the pattern for whoever moves next. Two major jurisdictions now mandate alternative distribution; the UK’s CMA designations, South Korea’s earlier billing rules, and various US state-level remedies all point the same direction. Through the rest of 2026, watch how Apple’s Japan marketplace-approval process actually behaves in practice (the gating is where the friction lives), whether Google publishes firmer Android marketplace terms, and whether early third-party stores find real volume in Japan or stall the way some EU marketplaces did at launch.

The strategic point for any studio with a Japan audience is that mechanical readiness compounds. Build alternative-distribution fluency in Japan now, and you’re a quarter or two ahead of competitors when the next jurisdiction’s rules land. If you want a candid read on whether the Japan mobile software competition act changes are worth acting on for your specific title — and which of alternative billing, third-party stores, or carrier billing fits your economics — we’d be glad to talk.

FAQ

Does Japan’s MSCA apply to my game?

The obligations fall on Apple and Google, not on you directly — but the opportunity applies to any developer with Japanese users. If you have meaningful revenue from Japan, you can now use alternative payments, external purchase links, and (on approval) third-party app stores to reach those users on better commercial terms. There’s no size threshold for developers to benefit; the question is whether your Japan revenue justifies the integration work.

When does Japan’s MSCA take effect?

The Act was enacted in June 2024 and its core obligations entered into force on 18 December 2025, enforced by the Japan Fair Trade Commission (JFTC). Implementation guidelines were published in July 2025, and Apple and Google announced their compliance changes around the December 2025 go-live, with rollout continuing into 2026.

How much commission will third-party stores and alternative payments charge in Japan?

Apple’s Japan terms cut App Store commission on digital goods to 21% (from 30%), and that rate applies whether you use Apple In-App Purchase or an alternative in-app payment processor. Apple payment processing is a separate 5% fee charged only on Apple In-App Purchase, so the all-in rate is 26% through Apple’s rails or 21% through your own. Small Business Program, Video Partner Program and Mini Apps Partner Program participants, and subscriptions after their first year, pay 10%; linking out to a website carries a 15% store services commission (10% for those programmes). Apps on an approved alternative marketplace pay a 5% Core Technology Commission on sales. On Android, Google’s external payments programme is open to games and charges 10% on auto-renewing subscriptions, 10% within an eligible developer’s first $1M of annual earnings, and 20% on other in-app digital content. Model these against your own ARPU rather than the headline rate.

Is Japan’s MSCA the same as the EU DMA?

Structurally very similar — both are ex-ante regimes that designate gatekeepers and force open third-party stores, payments, and browser engines, backed by revenue-based penalties. But the designation scope, JFTC guidelines, fee cards, and local payment conventions are Japan-specific. Treat your EU compliance work as a portable template, not a finished Japan solution.

What are the penalties for non-compliance under the MSCA?

According to the JFTC, designated operators that violate the Act can face fines of up to 20% of the relevant domestic turnover, rising to 30% for repeat violations. The penalty formula is deliberately large enough to make compliance the rational commercial choice for Apple and Google.

What’s the fastest way to benefit from the MSCA without building a new store?

Alternative billing. Staying on the App Store and Google Play but steering Japanese users to external or third-party payment — now permitted for games under the MSCA — recovers margin without the overhead of operating a third-party storefront. For most studios that’s the first move; carrier billing via docomo, au and SoftBank is the natural second.

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If you’re weighing whether Japan’s distribution opening is worth acting on, and which combination of alternative billing, third-party stores, and carrier billing fits your title’s economics, let’s talk — or see how the operational model works on our distribution practice page.