Global Support
Japan EC Market Entry & Operations Support
For international brands selling on Amazon Japan, Shopify Japan and DTC stores.
We help international brands organize and improve their Amazon Japan, Shopify Japan, GA4, Search Console and CSV data so they can make better decisions in the Japanese market.
Instead of relying on complex API integrations from day one, we start with the data you already have: Seller Central reports, Shopify orders, GA4 traffic, Search Console queries, ad reports and spreadsheets.
Our goal is to help your team understand what is happening in the Japanese market and what to improve next.
English & Japanese · JST (UTC+9) · Response within 1 business day (jst)
Practical support for Japan-specific EC decisions
Why Seller Sync Lab
Three things that make us different from a translation agency or generic consultancy
We focus on practical, Japan-specific decisions — not just translated reports.
Japanese-native operator who has run Amazon Japan and Shopify Japan accounts
Not a translation agency. We look at Seller Central, ad reports, GA4 and Japanese customer behavior the way an in-house operator would.
AI-ready EC data, not just reports
We structure your Amazon, Shopify and GA4 exports into CSVs and prompt templates that work directly in Claude, ChatGPT and Cursor — so your team can keep asking questions after we hand things over.
Cross-channel view in one place
Seller Central, Shopify, GA4 and Search Console reviewed together — so listing, ad and content decisions are based on the same picture, not three separate dashboards.
Who this is for
Built for international brands entering or growing in Japan
This service is for teams that need a clear, practical way to review Japanese EC performance before making larger investments.
What we help with
Japan EC operations, content and reporting support
We focus on the data and content your team can already access, then turn it into practical review points and next actions.
Amazon Japan Operations Review
Review your Amazon Japan listings, sales reports, inventory, ad data and product performance to identify practical improvement points.
Shopify Japan Localization & Analytics
Improve your Japanese Shopify storefront, product pages, GA4 data, Search Console queries and conversion paths for Japanese customers.
Japanese Listing & Content Review
Review product titles, descriptions, bullet points, FAQs and customer-facing copy to make them more natural and persuasive for Japanese buyers.
AI-Ready EC Reporting
Prepare your Amazon Japan, Shopify, GA4 and CSV data so your team can analyze it with ChatGPT, Claude or Cursor.
Monthly Japan EC Performance Report
Create a monthly report template covering sales, traffic, conversion, inventory, ad spend and key improvement actions.
Japan Market Entry Data Audit
Before investing heavily in Japan, review your current products, pricing, content and available data to clarify where to start.
Amazon Japan Support
Selling on Amazon Japan requires more than translating your product page. We help you review product listings, Japanese keywords, sales reports, inventory data and advertising reports so you can identify realistic improvement opportunities.
- Listing title, bullet point and description review
- Japanese keyword and search query review
- Seller Central report organization
- Product-level sales and inventory review
- Advertising report review based on available exports
- Practical action list for the next improvement cycle
Shopify Japan Support
For Shopify and DTC brands, we help improve the Japanese customer journey by reviewing product pages, localized content, analytics data and conversion paths.
- Japanese product page review
- GA4 and Search Console data review
- Shopify order and product data organization
- Conversion path and FAQ review
- Localization of customer-facing copy
- Monthly performance reporting
AI-ready reporting workflow
Make your EC data easier to understand and act on
We prepare your EC data so your team can work more effectively with AI tools. The goal is not to replace your team, but to make your sales, traffic, inventory and content data easier to understand and act on.
- Clean CSV and spreadsheet formats
- Monthly reporting templates
- Prompt templates for ChatGPT, Claude and Cursor
- Product-level performance summaries
- Actionable review checklists
- English summaries of Japanese market performance
Scope of support
Clear support boundaries for practical Japan EC work
We support operations review, data organization and content improvement. We keep the scope clear so expectations are realistic from the beginning.
What we do
- EC operations review
- Data organization
- Amazon Japan and Shopify Japan support
- Japanese content and listing review
- GA4, Search Console and CSV-based analysis
- AI-ready reporting workflow
- Monthly improvement recommendations
What we do not do
- Legal or tax advisory
- Import regulation judgment
- Guaranteed sales growth
- Full logistics outsourcing
- Guaranteed API access
- Fully automated advertising management
- Marketplace account ownership on behalf of clients
Process
How a typical 90-day engagement looks
An illustrative timeline so you can see what the first three months usually involve. The actual scope is agreed up front based on your channels, data availability and goals.
Phase 1 · Days 1–14
Kickoff & data audit
- Intro call (English or Japanese, JST)
- NDA and data-handling agreement
- Access to Seller Central, Shopify, GA4 and Search Console exports
- Snapshot of where you are today: listings, traffic, conversion, inventory, ads
Outcome
A written baseline and the 3–5 highest-impact issues to address first.
Phase 2 · Days 15–45
Review & first improvements
- Listing and Japanese content review
- GA4 and Search Console review
- Reporting template setup (CSV + AI prompt pack)
- First round of recommended changes implemented by you or with us
Outcome
A monthly reporting cadence in place and the first changes live on your store and listings.
Phase 3 · Days 46–90
Iteration & handoff
- Second review cycle based on the first 30 days of data
- Refinement of listings, content and reporting
- Documentation of the workflow for your internal team
- Decision point: continue with monthly support, pause, or hand off entirely
Outcome
Your team can run the monthly review independently, with optional ongoing support from us.
Illustrative timeline. Actual phases are scoped to your channels and data availability.
Pricing
Pricing is scoped per engagement
We do not publish fixed prices because every brand starts with different channels, data quality and goals. After the intro call we send a written proposal with scope, deliverables, timeline and fee.
What we look at when scoping
- Channels in scope (Amazon Japan, Shopify, GA4, Search Console, Rakuten, etc.)
- Number of SKUs and product pages
- Data availability and quality
- Whether you want a one-off review, a 90-day engagement, or ongoing monthly support
- Reporting language(s) and call cadence
How a proposal works
- Free 30-minute intro call to understand your situation
- Written proposal with scope, deliverables, timeline and fee — usually within 3 business days
- No obligation at the proposal stage
- Most engagements begin with a fixed-scope first phase before any retainer
About
Who you will be working with
We keep our company information clear so overseas brands know exactly who they are talking to before sharing data or signing anything.
- Business name
- SellerSyncLab
- Location
- Japan
- Working languages
- English & Japanese
- Timezone
- JST (UTC+9)
- Response time
- Within 1 business day (JST)
- Contact
- [email protected]
How we work with overseas brands
- Communication in English or Japanese — by email, shared docs, or scheduled video calls.
- We start from the data you can already export — no API access required for the first review.
- Engagements begin with a fixed-scope review so you can evaluate the work before committing to anything ongoing.
- We do not take ownership of marketplace accounts; we operate alongside your existing team and tools.
Full company registration details are disclosed without delay upon request, in line with Japanese disclosure practice for online services.
Start with a Japan EC Data Review
If you are already selling in Japan, or planning to enter the Japanese market, we can start by reviewing your existing store, product data and available reports.
Contact us to discuss Amazon Japan, Shopify Japan or Japanese EC operations. We reply in English or Japanese, typically within 1 business day (JST).