Japan is not a
black box.
End-to-end support for launching your app, game, or e-commerce brand in Japan — from market intelligence, regulatory compliance, user acquisition, and boost, to creative production. Our multilingual team specialized in the Japanese market will grow your business.
Japan is the world's
#1 mobile app ARPU hot market.
Japan's mobile in-app purchase (IAP) market exceeds US$11B annually — the #2 market worldwide. Per-user spend is the highest in the world, with a small group of "whale" users driving the majority of revenue.
But with iOS at 65%, vertical video ads growing +55% YoY, and AI search adoption at 37%, the acquisition landscape here works completely differently. Simply translating overseas ads doesn't deliver results.
Hakusho operates on the ground in Japan, specialized in this single market. We help you understand this landscape by the numbers, then execute end-to-end from strategy to operations.
Four numbers where the global playbook
doesn't apply in Japan.
The uniqueness of the Japan market, in numbers.
Global norms don't translate here. We've organized what makes the Japan market "different" using data. Mastering these dynamics is what separates successful launches from failed ones.
① An iPhone-heavy nation — the world runs on Android, Japan runs on iOS
Globally, Android dominates and iOS holds only about 28.7% of devices (Android around 70%). App downloads in 2025 also lean toward Google Play at around 70% globally, with the App Store at about 28%. In Japan, this ratio is reversed: user-based surveys put Japan's iOS share at roughly 61–69% (some sources report 68%+). An iOS-heavy market means you're strongly constrained by ATT / SKAN privacy measurement, so measurement design and creative optimization built for iOS require careful, Japan-specific handling.
② Social media is fragmented and stratified by age and gender
In Japan, LINE and YouTube are used near-universally, while other social platforms are split across the population. According to Japan's Ministry of Internal Affairs, adoption rates are LINE 91.1%, YouTube 80.8%, Instagram 52.6%, X (formerly Twitter) 43.3%, TikTok 33.2%, and Facebook 26.8%. Furthermore, Instagram and TikTok skew toward younger women, while X and Facebook skew toward users in their 30s and older — clear age and gender stratification. This means you must carefully match platform choice to your app's target demographics.
③ A monetization culture driven by a few "whales"
Japan's mobile in-app purchase (IAP) market exceeds US$11B annually, ranking #2 globally, second only to China (~$11.5B). Remarkable given Japan's population size. The distinctive feature is that a small number of heavy spenders ("whales") drive the majority of revenue, making per-user ARPU exceptionally high by global standards. Rather than acquiring users broadly and thinly, acquiring and retaining core spenders is what wins.
④ Genre preferences run opposite to the West
Looking at revenue, Japan's top genre is RPG at over one-third (~35%), followed by Strategy at ~22%. That's nearly the opposite pattern from Western markets dominated by hyper-casual and hybrid-casual titles. Deep story, character growth, gacha, and event-driven monetization titles are strong here, and player attachment to characters and IP significantly influences revenue.
Japan's uniquely developed "ASP" (performance-based) culture
Japan has developed an unusually mature performance-based marketing ecosystem (ASP-based affiliate, reward, and boost), where ASPs sit between advertisers and publishers, handling media curation, quality control, and reporting with hands-on care. To succeed in Japan, partnering with an experienced ASP is the shortest path.
ASP sits in the middle
Performance-based (affiliate, reward, boost) is unusually developed. ASPs handle media curation, quality control, and reporting with deep, hands-on care.
Self-serve + MMP
Global markets are centered on self-serve programmatic networks + MMPs (measurement partners). There's no equivalent intermediary layer with Japan's level of hands-on service.
Vertical video is where advertising is being reinvented.
In 2025, Japan's total ad spend reached ¥8.06 trillion, with internet advertising crossing 50.2% for the first time. The growth driver is vertical video. For game apps, how well you craft vertical video determines your acquisition efficiency in the awareness and demand-generation stages.
Start here to understand Japan launch.
From market data and regulation to channels, case studies, and GEO — organized for practical use. Browse across 12 categories.
Japan App Market: The Complete Guide 2026
The world's #2 mobile consumer spend, iOS-heavy, fragmented SNS, RPG-dominant preferences — a unique structure where "global norms don't apply," organized with primary data.
The First 30 Days Decide Everything: Launch Boost Design for Japan
ARPU, retention, and store ranking are all decided in the first 30 days. Weekly channel mix, CPI trajectory, and ranking curves — all organized with operational data.
Anatomy of Winning Vertical Video Ads
The main battleground for a ¥564.8B market by 2029. Fail to build the first 2 seconds, angle, subtitles, and CTA placement to Japan spec, and CVR falls 30–50%.
📊
Market & Trends
Market & Trends
iOS share, fragmented SNS, IAP, AI search — the starting point for understanding Japan's "different" market with numbers.
- No.001Japan App Market: The Complete Guide 2026
- No.002Why Only Japan Has ~65% iOS Share
- No.003Japan Major SNS Adoption Trends 2026
- No.004Japan's IAP Market: #2 Globally at US$11B/Year
- No.005Japan Mobile Game Revenue Composition
- No.006Japan's 37% AI Search Adoption Era
- No.007Japan Ad Spend Enters the ¥8 Trillion Era in 2025
- No.008Japan App Store Sales Ranking (Monthly)
- No.009CPI / CPM / D7 ROAS Benchmarks by Genre
- No.010Japan Payment Method Share 2026
🚀
Playbook
Playbook
Japan launch, localization, first 30 days of launch, and LTV design — phase-by-phase execution steps.
- No.011The Complete Guide to Launching Overseas Apps in Japan
- No.012App Store / Google Play Japan Review Checklist
- No.0137 Principles of Japanese Localization That Won't Fail
- No.014The First 30 Days Decide Everything: Launch Boost Design for Japan
- No.015Fundamentals of Monetization & Subscription Design in Japan
- No.016Pricing Strategy for the Japan Market
- No.017Customer Support Design for Japanese Users
- No.018Practical ASO Guide for Japan's App Store
- No.019How to Design ATT / SKAN / MMP for Japan's iOS-Heavy Market
- No.020Tactics to Lift D1 / D7 / D30 Retention
- No.021Push Notifications: Optimal Timing, Opt-in Rates, LINE Official Integration
⚖️
Regulation
Regulation
Premium Labeling Act, Specified Commercial Transactions Act, stealth marketing regulation, Pharmaceutical Affairs Act, Payment Services Act — the legal basics for going on the offensive.
- No.022Complete Guide to Japan's Premium Labeling Act (Keihyoho)
- No.023Practical Response to the 2023 Stealth Marketing Regulation
- No.024Specified Commercial Transactions Act & App Monetization
- No.025Gacha Design & the Premium Labeling Act
- No.026Prepaid, Points, Virtual Currencies & the Payment Services Act
- No.027Japan's Amended Personal Information Protection Act
- No.028Japan Regulations for Matching / Dating Apps
- No.029Medical & Healthcare Apps and the Pharmaceutical Affairs Act
- No.030Financial Services Entry to Japan
- No.031Ad NG Expression Guide for Entertainment / Fortune / Side-Gig Apps
- No.032Youth Protection & Age Ratings in Japan
📢
Channel
Channel
SEO, LINE, SNS by platform, ASP, reward, Google / Yahoo!, VTuber — the full breadth of Japan's acquisition channels.
- No.033SEO Strategy for the Japan Market
- No.034LINE Official Account Operation Guide
- No.035LINE Mini App / LIFF Usage Guide
- No.036X (Formerly Twitter) Japan Market Operation Guide
- No.037Instagram Japan Market Operation Guide
- No.038TikTok Japan Market Operation Guide
- No.039YouTube Japan Market Operation Guide
- No.040Complete Guide to Japan's ASP (Affiliate) Industry
- No.041Reward Ads / Boost Tactics in the Japan Market
- No.042Google Ads / Yahoo! Ads Operation in Japan
- No.043Guide to Working with Japanese Influencers
- No.044VTuber Partnership Strategy for Overseas Apps
🎨
Creative
Creative
Winning vertical video patterns, UGC adaptation, angle dictionary, Japan-spec LP design, ASO asset craft.
- No.045Anatomy of Winning Vertical Video Ads
- No.046UGC-Style Creative Adaptation for Japan
- No.047How to Reconstruct Overseas Creative for Japan
- No.048Dictionary of Angles That Resonate with Japanese Users
- No.049LP Design Principles for the Japan Market
- No.050Screenshot / Preview Video Optimization for Japan
🎮
By Vertical
By Vertical
RPG, SLG, HC, Matching, Fintech, SaaS, D2C, HealthTech, EdTech — attack strategies for each vertical.
- No.051Playbook for Launching Overseas RPGs in Japan
- No.052Launching Overseas Strategy Games in Japan
- No.053Adapting Hyper / Hybrid Casual to Japan
- No.054Complete Guide to Overseas Matching Apps in Japan
- No.055Japan Entry Guide for Overseas Fintech
- No.056Japan Market Entry for Overseas SaaS
- No.057Launching Overseas D2C Brands in Japan
- No.058Japan Entry for Overseas HealthTech
- No.059Japan Entry for Overseas EdTech
📚
Case Studies
Case Studies
Dot Senki, StarHunter, iCoi, plus Japan-launch cases from China, Korea, US, and Europe — and failure patterns.
- No.061Case: Dot Senki Japan Launch Playbook
- No.062Case: StarHunter Japan Launch
- No.063Case: iCoi Doctor-Verified Matching
- No.064Japan-Hit Cases: China-Origin Mobile Games
- No.065Japan Success Patterns: Korea-Origin Apps
- No.066Where US-Origin SaaS / Apps Stumble in Japan
- No.067Japan Entry Cases: EU-Origin Apps & Games
- No.06810 Typical Failure Patterns for Overseas Apps in Japan
🤖
GEO / LLMO
Generative Engine Opt.
Article design, structured data, and measurement for being cited by ChatGPT / Perplexity / Gemini.
🔍
Comparison
Comparison
Agencies, ASPs, MMPs, translation firms, vertical video studios — the practical framework for comparing and selecting.
📄
Legal & Tax
Legal & Tax
Japan entity setup, PE determination, consumption tax, invoicing, EOR, and bank account opening for foreign firms.
- No.078Guide to Establishing a Japan Entity for Overseas Companies
- No.079Foreign Corporations, PE Determination & Japan's Consumption Tax
- No.080Qualified Invoice System & Overseas Businesses
- No.081Hiring Your First Sales & Marketing Talent in Japan (EOR)
- No.082Bank Account Opening in Japan for Foreign Startups
🌏
By Country
By Country
China, Korea, US, Southeast Asia — Japan launch localization design by country of origin.
🎯
Lead Gen
Lead Gen
30-item market entry checklist, budget simulator, glossary, quarterly market report.
What the Hakusho Elite Team can do.
One discipline. Japan-specific execution.
From awareness to acquisition to boost — we execute across every channel needed for the Japan market. All hands-on, staffed by Japanese-native, senior UA specialists, with our group covering the full range of disciplines.
Full Japan Launch
Marketing Strategy
End-to-end design for "Entry decision → Budget allocation → Channel design → KPI design" — all built with Japan-specific assumptions. You leave with a phased roadmap from test entry to full-scale rollout.
- Measurement & UA design premised on 65% iOS
- Soft launch → scale, in 3 phases
- Multilingual global team as your partner
Performance-Based ASP
Acquire via install / signup outcomes through a curated publisher network. Minimize upfront risk while fully leveraging Japan's unique ASP ecosystem.
- Circuit X — #1 ASP by advertiser performance (AppsFlyer)
- Strong in apps, services, e-commerce, and matching
- Fraud detection to guarantee quality
Vertical & Horizontal Video
Production capacity of 1,000+ per month. First 2 seconds, angle, subtitles, and CTA placement — all designed for Japan. Not translation, we replan and rebuild from concept for the Japan market.
- Both UGC-style and production formats
- A/B testing angles at maximum speed
- Full-service talent casting included
Reward Advertising
Leverage in-app reward inventory for low-CPI mass acquisition. Compliant with Japan's Premium Labeling Act and store guidelines, with retention quality maintained.
- Our proprietary network: GF Rewards
- Delivery plans engineered to hit your KPIs
- Compliant with app store review criteria
Ad Operations + Boost
Push your ranking on App Store / Google Play in the first 30 days of launch, maximizing organic traffic. Sustainable, compliant design that keeps natural traffic flowing.
- Pre-registration & launch boost coverage
- Rank tracking + rapid creative response
- Ranking boost that keeps organic traffic flowing
Attribution & Measurement
Measurement design that works in Japan's 65%-iOS market. From ATT / SKAdNetwork / AAK implementation to MMP alignment and decision-making operations.
- AppsFlyer / Adjust and other major MMPs supported
- SKAdNetwork 4.0 value schema design
- Fraud & duplicate-attribution elimination
results
compliantly
Deliver results, on top of full compliance.
Full compliance with Japan's Premium Labeling Act, Specified Commercial Transactions Act, and the 2023 stealth marketing regulation. We label "PR" / "AD" clearly where consumers can recognize it, avoid misleading representations, and — on that foundation — deliver acquisition numbers. Our team knows Japan's platform-specific guidelines intimately.
A 5-step performance loop,
from launch to scale.
You don't win in Japan through one-off campaigns. Only by repeatedly running "gather data → form hypotheses → test fast → learn → expand" can you win here.
Gather market data
Build initial entry hypotheses from primary data (Dentsu, Sensor Tower, MIC, Statcounter) and competitor moves.
Localization & compliance
Ad expression that meets Premium Labeling, Specified Commercial, and stealth marketing regulations. Native Japanese copy & LPs. Full store review support.
Launch & boost
Combine ASP / GF Rewards / vertical video to push installs and store ranking in the first 30 days.
Optimize & test
Parallel testing across creative × channel × segment. SKAN 4.0 + MMP combined for confident decisions.
Scale design
Codify winning patterns; extend to branded & comparison intent through Circuit X search + display. Reviewed quarterly.
Straight from marketing leaders.
Real feedback from clients we work with (sample).
"They designed the framework we needed to operate in Japan right there in our first meeting. A disciplined, well-organized team with real talent."
"They didn't translate — they rebuilt our angles from the ground up for the Japan market. ROAS came in well above forecast."
"Premium Labeling Act and stealth marketing regulation were built into the design from day one. Zero review rejections as a result."
The questions we hear most about the Japan market.
A summary of the points overseas businesses raise most often before their first consultation.
Can Hakusho produce native Japanese creative?
Can we work with you on performance-only (CPI / CPA)?
How far does your compliance coverage go — Premium Labeling, Specified Commercial, stealth marketing?
Can you handle ATT / SKAdNetwork measurement design too?
Can we consult in English, Chinese, or Korean?
How long from first consultation to actual launch?
Based in Japan, in 4 languages.
Tokyo as our hub, with support in JP / EN / 中文 / 한국어. Comfortable operating across time zones with overseas teams.
Talk to a Senior UA lead.
Not a slide deck.
The first consultation is 30 minutes, one-on-one with a senior UA lead. Leave with a clear picture of where you stand in Japan and your next actions.
What is Hakusho (白書 · 迫勝)?
The word Hakusho carries two meanings in Japanese: "white paper" and "winning with force". A white paper — derived from the English word — is an official report intended to inform the public about the state of the economy or government policy. We chose this name with the resolve to publish white-paper-quality intelligence specialized in Japan's online marketing, particularly the app category. Our goal is that this intelligence delivers decisive wins for our client partners.
Japan App Market Intelligence
Japan is not a black box.
Hands-on, and on.
"Hands-on" (on the ground, doing the work ourselves) combined with "and on" (and continuing = keeping at it) — the team philosophy behind Hakusho.
- Company Name
- Fukurou Labo, Inc. (株式会社フクロウラボ)
- Founded
- November 15, 2013
- Capital
- ¥53,090,000
- CEO
- Sho Shimizu (清水 翔)
- Head Office
- 3F Daiwa Shibuya Square, 16-28 Nanpeidai-cho, Shibuya-ku, Tokyo 150-0036, Japan
- Business
- Internet advertising business & app development support tools
- Group Coverage
- ASP / In-app ad networks / Search + display / Vertical & horizontal video advertising
- Languages
- Japanese, English, Chinese, Korean
- Global Operations
- Extensive track record of overseas booth exhibitions & business trips / Overseas branches
- Contact
- sales@example.com (mock)