Japan has some of the highest-value mobile users in the world. Most UA managers never reach them — because they stop at Google and Meta.
In 2024, 88% of consumer mobile app advertising budgets were concentrated on Google and Meta. Meanwhile, marketers who diversified beyond these two platforms saw D30 ROAS improve by up to 214%. (Moloco, in collaboration with Sensor Tower and Singular, 2025)
That gap doesn’t happen by accident.
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Ad Budget Concentration vs. Where Users Actually Are
The Platforms You Know Are Getting More Expensive
Google and Meta haven’t gotten worse. They’ve gotten more crowded.
Gaming CPI on major platforms jumped 30% year-over-year as of 2026. (Adjust, 2026) Facebook mobile app install costs rose steadily from $1.96 in 2020 to over $2.60 by 2022 — and competition has only intensified since. (Business of Apps, 2025)
On top of that, Apple’s App Tracking Transparency framework has limited targeting precision. ATT opt-in rates for consumer apps averaged just 36% in the first half of 2025. (Moloco/Singular, 2025) That means roughly two-thirds of your iOS audience is harder to target, track, and retarget than it was three years ago.
More spend. Less signal. That’s the Google/Meta reality right now.
The Performance Case for Reward-Based UA
Reward-based user acquisition isn’t a niche channel anymore. In a 2025 survey of 502 mobile game developers across the US and UK:
The retention advantage is structural, not incidental. Reward-based formats are opt-in by nature — users actively choose to engage. That self-selection produces higher intent from the very first session.
D1 Retention Rate & ROAS Payback Period: Traditional vs. Reward UA
Why This Matters Even More in Japan
If you’re running UA in Japan specifically, the case for reward-based channels gets even stronger.
Japan’s mobile game ARPU sits at $578.84 — one of the highest in the world. (Statista, 2025) But the market’s value doesn’t come from volume. It comes from depth of engagement. Japanese players convert later, spend more over time, and respond poorly to interruptive ad formats.
What they do respond to is reward-based engagement. Over 81.3% of Japanese consumers actively participate in Poikatsu (ポイ活) — the everyday practice of earning and accumulating points. (Cross Marketing, 2025) Reward-based UA isn’t a foreign concept to Japanese users. It’s a behavior they already practice every day. That cultural alignment translates directly into campaign performance — opt-in users engage more deeply, retain longer, and monetize on the timelines that actually matter in Japan.
The Right Frame: Google/Meta + Reward UA
This isn’t an either/or argument. Google and Meta remain essential infrastructure for UA at scale — their reach and targeting capabilities haven’t disappeared.
The point is that using them exclusively means competing for the same crowded inventory, paying rising CPIs, and missing the 2 billion daily active users that exist outside their walls.
Reward-based UA fills the gap — not by replacing what works, but by extending reach into inventory that’s less saturated, more intent-driven, and better suited to high-value markets like Japan.
The 88% who stay inside the walled gardens will keep paying more for less. The 12% who diversify are already seeing the difference.
