Automate Your
E-commerce
Operations
All-in-one core system for modern online businesses.
Tsuhan Ace is a core business system for EC and direct-sales companies, provided by A.R. System Co., Ltd. It unifies order management, inventory management, and customer management with 999 custom free fields for flexible data handling. Over 36 years of track record since launch in 1990.
- Real-time data synchronization
- Up to 999 free custom feilds
- 30+ years of industry experience
36-Year Track Record · 999 Custom Fields · IT Subsidy Ready
36
Track record since launch in 1990
999
Industry-leading custom field count
450
Max IT Subsidy AMount
Trusted by 100+ E-Commerce Brands


























The Challenges
Still managing operations menually?
- Managing inventory across multiple stores manually
- High error rate in order fulfillment
- Customer support disjointed from order data
- Lack of real-time sales visibility
- Hard to scal your business
The Solution
E-commerce Ace solves it all.
- Real-time automated inventory sync
- Streamlined, error-free fulfillment workflows
- Integrated order support system
- Comprehensive analytics dashboard
- Data-driven insights and analytics
Powerful Features for your business
Real-time Inventory Management
Real-time inventory sync across multiple warehouses and marketplaces. Achieve zero double-booking and eliminate missed sales.
Up to 999
Free Fields
Unmatched customizability for any industry or model. Standard features cover 90%; free fields handle the remaining 10% unique to your operations.
Order Management Automation
Centralize phone, fax, web, and marketplace orders. Covers automated routing, status tracking, and document output.
Customer Management & CRM
Unify purchase history, call center records, and LTV analysis into a single customer profile. Supports customer deduplication.
Data Analysis & Reports
Multi-dimensional aggregation of sales, inventory, and customer data. View LTV, ROAS, and churn KPIs instantly on the dashboard.
Multi-channel Integration
API connections to Rakuten, Yahoo, Amazon, major WMS, accounting, and MA tools — while preserving your existing system assets.
How E-commerce Ace Works
Connect Your Stores
Connect your e-commerce platforms and marketplaces to E-commerce Ace.
Sync All Data
Orders, inventory and customer data are synchronload in real life.
Automate & Grow
Connect your e-commerce platforms and marketplaces to E-commerce Ace
What is Tsuhan Ace?
Tsuhan Ace is a core business system for EC and direct-sales businesses, provided by A.R. System Co., Ltd. since 1990. It centralizes order management, shopping cart, call center, and WMS (warehouse management), enabling precise marketing strategies and operational cost reduction simultaneously. Its defining feature is the “Free Fields” function – up to 999 custom fields per master record (products, customers, media, vouchers) – allowing flexible adaptation to any business requirement without expensive customization. Rich integration experience with Rakuten, Yahoo, Amazon, Shopify, and EC-CUBE supports omnichannel operations across online, offline, and physical retail.
Seamless Integrations
Works with the platforms you already use
















How Tsuhan Ace differs from OMS, ERP & EC Carts
a horizontal ERP or a simple order-management add-on.
Success Stories From Our Customers
Amazing customer service made possible by online retailers Ace during COVID-19 pandamic .
CrushonCo, Ltd.
We offer hundreds of custom-made options, enabling a proactive e-commerce strategy with a high degree of flexibility.
CrushonCo, Ltd.
Ready to transfer your e-commerce business ?
Join 100+ businesses that trust e-commerce Ace for their growth.
Let's Talk About Your Business
Our experts are here to help you find the best solution for your e-commerce needs.
- 03-5811-1864
- info@ace-ars.jp
-
2-2-2 Nihonbashi Odenma-cho, chuo-ku,
Tokyo 103-0011, Japan