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News
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2026.10.02
Fixed a bug where orders were left without post...
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2026.10.02
You can now show cancellation terms and accept ...
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2026.10.02
All 7 Apps Have Earned "Built for Shopify" Stat...
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2026.10.02
We've Earned "Built for Shopify" Status, the Ma...
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2026.10.01
Clearer error when an automatic discount exceed...
Our Track Record
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🏆 Winner of Shopify Partner of the Year 2025 Japan
“Shopify Partner of the Year 2025 Japan” recognizes the most outstanding achievements within Shopify’s partner ecosystem in Japan.
Tsun received the Ecosystem App Developer of the Year award — the highest honor, given to the app development partner that has contributed most to expanding the Shopify ecosystem through public apps widely adopted by merchants in Japan. -
💎 Japan’s First, and Most, Marks of Highest Quality
View our Shopify appsOur Shopify apps were the first from a Japanese company to earn “Built for Shopify,” Shopify’s official badge for the highest-quality apps. Today we hold the badge for seven apps — more than any other company in Japan.
“Built for Shopify” is granted only to apps that meet Shopify’s highest standards for speed, ease of use, and the value they deliver to merchants.
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📈 Trusted by Over 15,000 Stores
View our Shopify appsOur “RuffRuff” series of Shopify apps, developed and provided in-house, has now been installed by over 15,000 stores.
By continuously incorporating the real feedback and operational know-how we receive from so many merchants, our apps keep evolving into tools that are genuinely useful in the field. We remain committed to prioritizing “voices from the field” as we continue delivering more convenient, high-quality apps.
Services
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🛠️ E-Commerce Store Development
Stores built to sell, easy to run, and tied directly to results
We design each store around both marketing strategy and operational efficiency, building e-commerce experiences that accelerate your business growth.
We go beyond simply building a site: we deliver higher sales and more efficient operations at the same time. Drawing on extensive build experience and deep industry knowledge, we create stores that keep working for years to come. -
📈 IT & Marketing Support
Meaningful operational improvement, planned for the long term
Rather than short-term fixes, we select the right IT tools with a long-term perspective and support sustainable operational improvement. Full custom development is also available.
Proven tactics plus speed, to uncover each store’s own growth drivers
We start with proven tactics that support growth reliably. From there, rapid cycles of hypothesis and testing let us identify the growth drivers unique to your store early and accelerate from there.
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📱 Shopify App Development
High-quality, user-driven apps that solve real e-commerce challenges
We were the first Japanese company to earn “Built for Shopify,” Shopify’s official badge for the highest-quality apps, and our apps have since grown to more than 15,000 stores.
By feeding the practical knowledge we gain from store development and marketing support straight into our product work, we deliver apps that are genuinely useful in day-to-day operations, at a consistent level of quality.
RuffRuff Apps
Every app comes with a free trial, so you can try it out with ease.
RuffRuff Pre-orders
💎 Built for ShopifyPre-orders, VIP-only sales, and deferred payments
Learn more →RuffRuff Order Limits
💎 Built for ShopifyPurchase limits by quantity, amount, customer, shipping, and more
Learn more →RuffRuff Order Bonus
💎 Built for ShopifyMember-tier discounts, gifts, and other purchase bonuses
Learn more →RuffRuff Selling Periods
💎 Built for ShopifyLaunch announcements and limited-time sales
Learn more →RuffRuff Table of Contents
💎 Built for ShopifyAutomatic tables of contents for articles and products
Learn more →RuffRuff Product & Blog Tags
💎 Built for ShopifyAutomatic tag lists and tag filters
Learn more →RuffRuff Author Profiles
💎 Built for ShopifyAuthor profiles for articles and products
Learn more →View on the App Store
Check reviews and pricing plans on the Shopify App Store.
Go to the App Store ↗Shopify Blog
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[2026 Latest] Recommended Shopify Apps: A Compl...
TsunライターチームA detailed, purpose-by-purpose guide to recommended apps that streamline Shopify operations. Covers customer acquisition, CVR improvement, blog extensions, CRM, workload reduction, and AI-powered apps. Curated information useful for beginners and...
[2026 Latest] Recommended Shopify Apps: A Compl...
TsunライターチームA detailed, purpose-by-purpose guide to recommended apps that streamline Shopify operations. Covers customer acquisition, CVR improvement, blog extensions, CRM, workload reduction, and AI-powered apps. Curated information useful for beginners and...
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What is Shopify Canvas? Capabilities, how to us...
Tsun ライターチームShopify Canvas, announced on October 1, 2026, is a design screen where you can edit your theme together with Sidekick while viewing every page of your store side by side....
What is Shopify Canvas? Capabilities, how to us...
Tsun ライターチームShopify Canvas, announced on October 1, 2026, is a design screen where you can edit your theme together with Sidekick while viewing every page of your store side by side....
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[2026 Edition] How to Migrate Data from STORES ...
TsunライターチームFor merchants considering a move from STORES to Shopify, this guide explains the differences in pricing and features between the two services, which data can and cannot be migrated, the...
[2026 Edition] How to Migrate Data from STORES ...
TsunライターチームFor merchants considering a move from STORES to Shopify, this guide explains the differences in pricing and features between the two services, which data can and cannot be migrated, the...
Partners
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Shopify
Shopify is one of the world’s largest commerce platforms, used by millions of stores across 175 countries.
With several plans to match the scale of your business, it serves everyone from small merchants to large enterprises.
It also offers a vast ecosystem of apps and integrations, so you can customize it to fit the way you work — from inventory syncing to connecting data with physical stores. -
BASE
BASE is one of Japan’s largest domestic e-commerce platforms, used by more than 1.8 million stores. Its biggest draw is that you can build an online store with no setup fee and no monthly fee.
Free templates also mean you can launch a store without any design or development knowledge.
Despite being free to start, it offers a rich set of extensions and payment methods. -
SHOPLINE
SHOPLINE is an e-commerce platform used by more than 600,000 stores worldwide, with particular strength in cross-border commerce across Asia.
Anyone can build a store without code, and standard features include multi-language and multi-currency support, live commerce, and POS integration — covering everything from domestic sales to cross-border e-commerce.
Interviews & Case Studies
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[Store Interview, Part 2] Building and Growing ...
テキサス・アユミ"Even when e-commerce is the main battlefield, e-commerce isn't the goal." An in-depth look at our interview with Yuji Kono of Mon Marché, whose brand "Yasai wo MOTTO" grew its...
[Store Interview, Part 2] Building and Growing ...
テキサス・アユミ"Even when e-commerce is the main battlefield, e-commerce isn't the goal." An in-depth look at our interview with Yuji Kono of Mon Marché, whose brand "Yasai wo MOTTO" grew its...
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[Store Interview, Part 1] Even When E-Commerce ...
テキサス・アユミ"Even when e-commerce is the main battlefield, e-commerce isn't the goal." Part 1 of our interview with Yuji Kono of Mon Marché, whose brand "Yasai wo MOTTO" grew its e-commerce...
[Store Interview, Part 1] Even When E-Commerce ...
テキサス・アユミ"Even when e-commerce is the main battlefield, e-commerce isn't the goal." Part 1 of our interview with Yuji Kono of Mon Marché, whose brand "Yasai wo MOTTO" grew its e-commerce...
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[Store Interview, Part 2] As Long as You Don't ...
テキサス・アユミKei Kinoshita, President of Beverich, discusses his strategy for splitting roles between Shopify and Amazon, how he uses the RuffRuff apps, and a management philosophy that turns failure into learning....
[Store Interview, Part 2] As Long as You Don't ...
テキサス・アユミKei Kinoshita, President of Beverich, discusses his strategy for splitting roles between Shopify and Amazon, how he uses the RuffRuff apps, and a management philosophy that turns failure into learning....
EC Know-How & Operations Guide
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Using Social Listening to Boost E-Commerce Sale...
Meltwater Japan株式会社An overview of social listening for boosting e-commerce sales. Covers how to analyze reviews and UGC, steps for using insights to improve product pages and marketing, and key points for...
Using Social Listening to Boost E-Commerce Sale...
Meltwater Japan株式会社An overview of social listening for boosting e-commerce sales. Covers how to analyze reviews and UGC, steps for using insights to improve product pages and marketing, and key points for...
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How to Sell Original T-Shirts? 4 Selling Method...
Tsun ライターチームAn explanation of how to sell original T-shirts. Compares four methods—all-in-one POD services, online marketplaces, events, and your own online store—and covers how to decide on product specifications, the process...
How to Sell Original T-Shirts? 4 Selling Method...
Tsun ライターチームAn explanation of how to sell original T-shirts. Compares four methods—all-in-one POD services, online marketplaces, events, and your own online store—and covers how to decide on product specifications, the process...
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How to Sell Original Merchandise: Choosing Your...
Tsun ライターチームIndividuals and small circles or teams can sell original merchandise, too. This guide covers how to choose your first product, decide on an inventory approach (in-stock, POD, or pre-order), compare...
How to Sell Original Merchandise: Choosing Your...
Tsun ライターチームIndividuals and small circles or teams can sell original merchandise, too. This guide covers how to choose your first product, decide on an inventory approach (in-stock, POD, or pre-order), compare...
EC Platforms (Introduction, Comparison, and Migration)
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[2026 Edition] Comparison of 17 E-Commerce ASPs...
Tsun ライターチームA comparison of 17 e-commerce ASP services by pricing, payment processing fees, and features. Introduces them by purpose—free and low-cost, full-scale operation, recurring mail-order, and cross-border e-commerce—and explains cost estimates...
[2026 Edition] Comparison of 17 E-Commerce ASPs...
Tsun ライターチームA comparison of 17 e-commerce ASP services by pricing, payment processing fees, and features. Introduces them by purpose—free and low-cost, full-scale operation, recurring mail-order, and cross-border e-commerce—and explains cost estimates...
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[2026 Edition] What Is STORES? A Thorough Guide...
Tsun ライターチームLearn what STORES is, its pricing plans, pros and cons, main features, support options, and examples of businesses using it. We also explain the differences between the Free and Standard...
[2026 Edition] What Is STORES? A Thorough Guide...
Tsun ライターチームLearn what STORES is, its pricing plans, pros and cons, main features, support options, and examples of businesses using it. We also explain the differences between the Free and Standard...
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Complete Guide to Migrating from BASE to Shopif...
TsunライターチームFor merchants considering a move from BASE to Shopify, this guide explains how to decide based on fee estimates by monthly sales, which data can and cannot be carried over,...
Complete Guide to Migrating from BASE to Shopif...
TsunライターチームFor merchants considering a move from BASE to Shopify, this guide explains how to decide based on fee estimates by monthly sales, which data can and cannot be carried over,...
Tech Blog
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What Is a Shopify Webhook? Types, Setup Methods...
Tsun ライターチームThis article explains how Shopify Webhooks automatically notify external systems of order and product changes, along with their types, setup methods, differences from the API, and key points to keep...
What Is a Shopify Webhook? Types, Setup Methods...
Tsun ライターチームThis article explains how Shopify Webhooks automatically notify external systems of order and product changes, along with their types, setup methods, differences from the API, and key points to keep...
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What Is the Shopify Catalog API? The Difference...
Tsun ライターチームThe Shopify Catalog API is a mechanism that lets AI agents search for and retrieve products and guide shoppers to where they can buy them. This article explains, for developers,...
What Is the Shopify Catalog API? The Difference...
Tsun ライターチームThe Shopify Catalog API is a mechanism that lets AI agents search for and retrieve products and guide shoppers to where they can buy them. This article explains, for developers,...
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What Are Shopify Functions? A Clear Explanation...
Tsun ライターチームA complete guide to Shopify Functions, including how they differ from Shopify Scripts, what they can do, and how to implement them. Prepare for the June 2026 retirement of Scripts...
What Are Shopify Functions? A Clear Explanation...
Tsun ライターチームA complete guide to Shopify Functions, including how they differ from Shopify Scripts, what they can do, and how to implement them. Prepare for the June 2026 retirement of Scripts...