Sell on Amazon Japan — Without Speaking a Word of Japanese.
amazon.co.jp is a ¥6 trillion marketplace with 67 million users and only 175,000 sellers — Amazon's quiet goldmine. But the gates are real: Japanese-only everything, ACP imports, JCT invoices, PSE and PMDA compliance. We hold every key. Japanese PPC, SEO, listings, A+ Content, reinstatement and FBA Japan — 35,000+ ASINs managed, $50M+ in client sales, one team fluent in Amazon and native in Japanese business.
Trusted by Amazon Sellers, Global Brands & FBA Founders
The team behind Japan's Amazon winners
Japan Is a Goldmine With Gates. We Hold Every Key.
¥6 trillion in GMV, 67 million users — guarded by language, customs, tax and compliance walls that filter out lazy sellers. That is exactly why margins survive here. We clear all six, every week.
Every Amazon Japan Service Under One Roof
From first co.jp launch to category leadership — Japanese PPC, SEO, listings, A+, reinstatement and FBA. One team, one rhythm, zero finger-pointing.
Amazon Japan PPC & DSP — co.jp
Sponsored Products, Brands, Display and DSP on amazon.co.jp — Japanese keyword strategy tuned to cut ACoS while you climb the rankings.
Japanese SEO & Native Listings
4-phase SEO with Japanese keyword research, native copy, backend terms and rank tracking — built for how Japan actually searches.
A+ Content, Brand Store & Design
Premium A+ modules, Brand Story and Stores in flawless Japanese — detail-rich content for buyers who read everything before they buy.
Amazon Account Management: Seller & Vendor Central
Full 3P/1P oversight — FBA Japan inventory, reimbursements, Japanese case logs, account health, SLA concierge.
Reinstatement & Suspension Appeals
Suspension appeals, POAs that stick, verification support, Brand Registry, hijacker removal, infringement defense — in Japanese.
Amazon Product Launch Service
Review velocity, Vine Japan, early-traction PPC and ratings engineered for page one on amazon.co.jp — ruthlessly.
Japan Entry Consulting & JCT Analytics
True break-evens with duty, import JCT, FBA Japan fees and ads modeled before you commit a shipment. No surprises at customs.
Foreign-Brand Entry: ACP, JCT & MOR
ACP imports, JCT registration and Japanese compliance for overseas brands — or skip Seller Central entirely with our record service.
Sales flatlining — locked out, failed checks, frozen funds? Skip the sales call — talk to a reinstatement specialist.
Diagnose My Account →Every lever. One connected machine.
PPC drives organic momentum, relevance lifts conversion, conversion decides if it all pays — sustainably. That's how you win amazon.co.jp instead of renting rank.
- ✓Average 20% ACoS reduction after onboarding
- ✓SEO + PPC planned as one P&L
- ✓Weekly scorecards in JPY & USD, async across time zones
- ✓Compliance wireframed into every launch
Engine
Six reasons sellers on amazon.co.jp choose us over any other agency
Every claim substantiated. No buzzwords. Just verifiable differentiators from full-time Amazon specialists.
Japan-Entry Natives
ACP imports, JCT invoices, Japanese Seller Central — we run entries most agencies have never attempted. Japan is not a division here; it is a practice.
Japanese Without Accent
Ex-marketplace editors, not translators. Your listings read Tokyo-born, not machine-made — down to the keigo.
Landed-Cost First
Every plan starts with duty, import JCT, FBA Japan fees and ads modeled per size tier. If the math fails, we tell you before you ship.
Reinstatement Depth
Suspension appeals and POAs are a core practice, not a favor. Frozen funds recovered, ASINs relisted.
Tokyo-Clock Coverage
Async-first across Japan–US–EU time zones: email, chat, video and SLA portal. Wake up to progress, not questions.
Your Account, Your Rules
Your account, your data, your brand. Month-to-month, cancel anytime, seniors only.
📋 Your report — sample layout
Illustrative layout — figures shown are examplesAmazon Agency vs Freelancer vs In-House Hire
All three can work. Here is the honest math for a brand doing $50K–$1M a year on amazon.co.jp — no sales spin.
| GrowithAmazon | Freelancers | In-House Hire | |
|---|---|---|---|
| Monthly cost | One flat fee, full team | Cheap per head, adds up fast | Salary + benefits + hiring risk |
| Amazon coverage | PPC, SEO, listings, A+, FBA, reinstatement | One skill each, gaps everywhere | One generalist, stretched thin |
| Japanese level | Native-Japanese copy & support | Hit or miss | Rare outside Japan |
| Speed to results | Week-one execution | Weeks of briefing | Months of ramp-up |
| Reporting & accountability | Weekly scorecards + SLA | Screenshots (maybe) | Whatever they feel like |
| Scales beyond Japan | Japan + 8 marketplaces, same team | Hire again per market | Impossible solo |
Serving Sellers Across Japan. Scaling Brands Worldwide.
From Tokyo's D2C brands to Osaka's wholesalers, Nagoya manufacturing to Fukuoka startups — plus foreign brands entering from the US, EU and China. Account, FBA-inbound and compliance handling tailored to your base and category.
Japan FBA Inbound
Ocean/air booking, ACP customs clearance, inbound scheduling, prep, labeling and inspections.
JP Compliance Ready
PSE, Giteki, PMDA, Food Sanitation and JCT know-how — filings and Amazon docs handled.
JPY-Aware Margins, Protected
Price plans that survive duty, import JCT and USD/JPY moves — planning first.
Golden Week & Year-End Calendar
Stock buffers around Golden Week, Obon, and the year-end/New Year peak.
Enter Japan. We'll Carry the Paperwork.
Our Japan Entry Service lets overseas brands sell on amazon.co.jp — ACP importer setup, JCT registration and Japanese compliance handled. No entity, no paperwork maze.
You ship & supply
Focus on product and production capacity.
We handle Japan end-to-end
ACP imports, JCT, listings, PPC, FBA Japan and Seller Central.
You collect clean JPY payouts
Scalable co.jp income without entity or paperwork risk.
Real Amazon Wins From Real Brands
No anonymous screenshots. Real names, real numbers — we'll walk you through each on a call.
Think Play Toys: the 250% climb
Stuck and no north star — fixed with PDP refreshes, PPC restructuring, inventory resets, return-reduction, and bundles.
Read the full case study →Multihome Furniture: the $3M+ turnaround
Stagnant shelves, defect claims, stockouts — after multiple agencies failed. Deep diagnosis and operational rebuild: throughput 3X.
Read the full case study →Home Harbour: the +45% comeback
Metrics sliding for months with return rates over 40% eating the bottom line — recovered through total overhauls, tighter inventory, PPC, and better packaging.
Read the full case study →Amazon Ads Certified · Advertising Partner
Verified for managed ad volume and badged staff. In plain English: it confirms our relationship with Amazon — not a forecast of your outcomes.
Native-Japanese Bench
Text, A+, and support written by mother-tongue talent — the believability gap most newcomers never close solo.
Dedicated growth teams
One senior-led team across PPC, SEO, and operations — so nothing falls between owners.
Amazon SPN Listed
Amazon's directory of vetted providers — searchable by service, language, and location. Verify us yourself.
Hot Categories on Amazon Japan
From amazon.co.jp to every major marketplace
Win Japan first — then clone your winners to the US, UK, EU and APAC. Same team, same playbook, localized per market.
Win Amazon Japan First
Deep demand, thinner competition. Japanese PPC, SEO, and ratings engineered for page one on amazon.co.jp — ruthlessly.
Then Conquer the US, EU & APAC
Replicate your winners across the US, Europe, and APAC — with localization done in-house.
From Free Audit to Lift-Off in 5 Clear Steps
Progress starts immediately. Most sellers feel movement in week one — not after endless decks.
Free Japan Audit
40+ checkpoints across listings, PPC, compliance & FBA — in 1 business day.
Launch Roadmap
Category, landed-cost math and timeline — agreed before you ship.
Listings + Compliance Build
Japanese titles rewritten, A+ deployed, PSE/JCT filed.
PPC Ignition
Ads firing, reviews compounding — reported in JPY & USD.
Scale Worldwide
New ASINs, new marketplaces, same playbook.
You'll always know exactly what's happening
No black-box reporting. Real data, real cadence, real accountability — async-first across Japan–US–EU time zones. Every KPI that matters, reported in JPY & USD.
Weekly Scorecards
ACoS, TACoS, ROAS, and CVR — weekly.
Monthly Strategy Huddles
Live video check-ins with your pod to set the course.
SLA-Based Ticketing
Every request tracked and resolved within defined SLA windows.
Veteran Operators
PPC, SEO, and creative pros behind one quarterback.
📊 Performance Dashboard
↑ Trending UpWhat Amazon sellers say
“GrowithAmazon transformed our Amazon sales strategy. Their expertise in listing optimization and PPC management increased our visibility and boosted conversions within the first 60 days. Highly recommended.”
“Their Amazon account management service is reliable, professional, and result-driven. From fixing backend issues to managing inventory and account health, they handled our store like true experts. Our ACOS dropped by 35%.”
“From the very first call, GrowithAmazon impressed us. Their understanding of Amazon's marketplace, coupled with attention to detail, means we've grown to depend on them as our own team. An exceptional ecommerce agency.”
Everything you want to know before hiring an Amazon agency in Japan
The GrowithAmazon Promise
Cancel anytime. No annual contracts, ever.
Your account, your data, your brand. Always.
No juniors learning on your budget.
Ranking commitment, in writing, guaranteed.
Get Your Free Amazon Japan Audit
Discover exactly what's holding your Amazon sales back — free audit, limited slots each month.
- ✓40+ checkpoint Japan review
- ✓Japanese listing assessment with fixes
- ✓Landed-cost & profit-leak findings
- ✓Custom co.jp action plan for your lineup
- ✓No strings. No annual contracts.
- ✓Running in 5–7 days, no office needed