Tsun Inc. has been awarded "Ecosystem App Developer of the Year" at the Shopify Partner of the Year 2025 Japan awards, presented by Shopify Japan.
Learn MoreIntroducing "RuffRuff Order Bonus" - the Shopify app that makes any discount strategy possible! 🎉
Learn MoreThe number of stores using the RuffRuff series has reached a total of 10,000 stores! 🎉
We are the first Japanese company to receive the highest quality certification Built for Shopify from Shopify official. Built for Shopify can only be earned by Shopify apps that meet Shopify's highest quality standards for speed, usability, and merchant benefits.
We have earned Built for Shopify for four apps, the highest number among Japanese companies.The apps that received the certification are RuffRuff PreOrders, RuffRuff Order Limits, RuffRuff Table of Contents, and RuffRuff Product & Blog Tags.
We are the first Japanese company to receive the highest quality certification Built for Shopify from Shopify official. Built for Shopify can only be earned by Shopify apps that meet Shopify's highest quality standards for speed, usability, and merchant benefits.
We have earned Built for Shopify for four apps, the highest number among Japanese companies.The apps that received the certification are RuffRuff PreOrders, RuffRuff Order Limits, RuffRuff Table of Contents, and RuffRuff Product & Blog Tags.
90+
Countries where the app is used
10,000+
Total number of stores using the app
98%+
Percentage of positive reviews
RuffRuff Apps
RuffRuff Order Bonus
June 2025 — New Release
A Shopify app that enables various promotional benefits such as "discounts by membership tier," "first-come-first-served discounts," "volume discounts," "free gift distribution," and "sample distribution."
RuffRuff Pre Order
💎 Built for Shopify
A Shopify app that enables pre-orders, limited-time sales, VIP member exclusive sales, early-bird discounts, release announcements, pay later options, purchase restrictions, bundling control, and quantity limits - all in one solution
RuffRuff Order Limits
A Shopify app that can implement all types of purchase restrictions in one solution - including quantity limits, price limits, customer restrictions, and bundling restrictions
RuffRuff Table of Contents
💎 Built for Shopify
A Shopify app that can automatically generate tables of contents for blog posts, products, pages, and collections
RuffRuff Product & Blog Tags
💎 Built for Shopify
A Shopify app that can automatically display tag lists for products, blog posts, collections, and blog lists
RuffRuff Author Profiles
A Shopify app that can automatically display tag lists for products, blog posts, collections, and blog lists
RuffRuff Selling Periods
A Shopify App that Enables Product Sales Period Settings, Pre-release Announcements, and Limited-time Sales
Trusted by over 10,000 brands of all sizes
Why Choose Us
Why Many Stores Continue to Choose Our RuffRuff App
Technical Excellence Recognized as Top-Quality App
We are the first Japanese company to receive Shopify's highest quality certification "Built for Shopify." With technical capabilities worthy of being selected as a top-quality app, we continue to develop secure, user-friendly, high-quality apps for merchants.
Reliable Japanese Language Support
As an app developed by a Japanese company, the admin panel, help pages, and customer support are all available in Japanese.
Over 95% Positive Reviews
More than 95% of reviews for our apps have received 5 stars or higher ratings.
Track Record of Over 9,000 Stores
RuffRuff apps have been used by more than 9,000 stores in total. With widespread usage, our apps continue to improve in both functionality and stability.
Expertise in Store Building, Operation, and Growth
Our development team consists of members with hands-on experience in building Shopify stores, achieving actual sales growth, and operating stores themselves.
Shopify × ディスカウント
How to Set Up Discounts on Subscription Products by Membership Rank in Shopify
Learn how to vary subscription prices by membership rank using Shopify Subscription. Using the RuffRuff Order Bonus app, this guide walks through — with screenshots — how to automatically apply a t...
The complete guide to Shopify discount strategies. From free built-in features to advanced apps, this article covers 17 strategies that boost sales and drive repeat purchases at the same time. Expl...
How to Set Up Volume Discounts on Shopify | Simple Bulk-Purchase Discount Settings
This article explains how to set up volume discounts (bulk-purchase discounts) on Shopify using the easy-to-configure Shopify app "RuffRuff Order Bonus."
This article clearly explains, step by step, how to use the Shopify app "RuffRuff Order Bonus" — which is easy to use with simple settings — to set up half-price or free shipping when customers pur...
How to Set Discount Rates by Membership Rank in Shopify | Discounts Using Customer Tags
Learn how to set up membership-rank discounts using the simple, easy-to-configure Shopify app "RuffRuff Order Bonus." This guide walks through the setup steps in detail for applying tiered discount...
Boost customer loyalty by offering free shipping exclusively to VIP members! This article gives a beginner-friendly explanation of how to set up shipping discounts using customer tags with the easy...
Shopify × ギフト
How to Set Up a Repeatable Gift on Shopify | Give a Gift Every Time a Condition Is Met
A guide to setting up a repeatable gift on Shopify, like "1 free gift for every 3 purchased." With the Shopify app "RuffRuff Order Bonus," you can implement automatic gifts based on purchase quanti...
A guide to setting up a "choice gift" on Shopify, letting customers pick their favorite gift when a condition is met. Learn how to use the Shopify app "RuffRuff Order Bonus" to build a novelty camp...
How to Give Away a Free Digital Product on Shopify When a Condition Is Met
A guide to giving away digital products as a gift on Shopify. Learn how to connect the "Digital Downloads" app with "RuffRuff Order Bonus" to automatically send buyers digital content, step by step.
How to Give VIP Customers a Free Gift on Shopify | Gift Distribution Based on Customer Tags
A detailed guide to automatically distributing a free gift to VIP customers based on a customer tag, using the RuffRuff Order Bonus Shopify app. Boost customer satisfaction and repeat purchase rate...
A guide to automatically distributing sample products on Shopify. Learn how to use the RuffRuff Order Bonus app to give away a sample product on orders of ¥10,000 or more, boosting average order va...
How to Give Away Free Gifts on Shopify | Gift Distribution Based on Quantity
A step-by-step guide with screenshots to automatically distribute free gifts on Shopify. Learn how to configure a 3-or-more quantity condition and enable your theme with the RuffRuff Order Bonus ap...
Order Limits
A thorough 2026 comparison of 9 must-have order limiting apps for Shopify stores! From quantity, price, and selling period limits to fraud prevention, find the best app for your store based on feat...
Explains how to set up complex shipping conditions in Shopify. Introduces the concrete steps for combining prefecture, product weight, and purchase amount to differentiate Standard Shipping and Nek...
[2026 Latest] Price Limits on Shopify | Recommended Order Limits Apps Included
Learn how to set price limits on Shopify. Using RuffRuff Order Limits, this article explains in detail how to set a price limit per order, along with the steps and various applications of price lim...
A thorough explanation of how to set up bundle control in Shopify! We introduce recommended apps for handling various shipping conditions, along with the steps for setting up effective bundle restr...
[2026 Latest] How to Disable Single-Item Purchases on Shopify
This article explains how to prevent a specific product from being purchased individually on Shopify. We introduce in detail the steps for setting up bundle restrictions with RuffRuff Order Limits,...
[2026 Latest] How to Implement Quantity Limits on Shopify! Restrict Purchases Based on Quantity
Learn how to set up quantity limits on your Shopify store. Using RuffRuff Order Limits, this article provides beginner-friendly steps for easily managing quantity limits. It delivers information to...
Shopify x 予約販売
Shopify Limited-Time Sale Guide: Comparing and Explaining 3 Methods
A thorough guide to the three ways to run a limited-time sale on Shopify. Compares the built-in feature, manual setup, and dedicated apps, along with the pros and cons of each and how to use RuffR...
Implementing VIP Member-Only Sales on Shopify | The Complete Guide with RuffRuff Apps
A detailed guide to implementing VIP member-only sales on Shopify. A complete step-by-step setup guide using the RuffRuff Order Limits and RuffRuff Pre Order apps. Boost customer loyalty and increa...
How to Use and Specifications of the Countdown Timer Feature in the Shopify App "RuffRuff Pre Order"
Explains the basic steps for installing the "Countdown Timer" feature of RuffRuff Pre Order on the product page. Assuming an Online Store 2.0 compatible theme, this briefly summarizes the key point...
Explains how to combine CRM PLUS on LINE with RuffRuff Pre Order to offer products exclusively to LINE-linked members and sell at discounted prices. This article introduces, step by step, effective...
This article explains how to sell products exclusively to LINE-linked members on Shopify. It introduces recommended Shopify apps and shares example settings for exclusive sales and promotions for L...
A detailed explanation of how to run early access exclusively for VIP members on Shopify. Using the RuffRuff Pre Order app, this article introduces step by step how to implement effective member-ex...
Shopify × ブログ
How to Implement Tag Lists and Tag Filtering in Shopify
A complete guide to Shopify's tag feature. Implement tag list display and filtering using three methods: themes, apps, or code. We also cover setup and customization steps for RuffRuff Product & Bl...
Comparing 3 Shopify Tag List Apps | Pricing, Features, and Setup Explained
Compare the Shopify tag list apps "RuffRuff Product & Blog Tags," "Simple Blog Tag Filter," and "Quick Tag Search." We break down pricing, features, and setup to help you choose the best app for yo...
3 Ways to Automatically Display a Table of Contents in Shopify Blog Posts | Free App Setup Guide
Learn three methods to display a table of contents in Shopify blog posts (source code customization, app usage, theme usage). Step-by-step instructions focus on setup using the free app RuffRuff Ta...
How to Display Author Profiles on Shopify Blog Posts [Comparing 3 Options]
A thorough comparison of three ways to display author profile information on Shopify blog posts. We explain the features, advantages, and disadvantages of the standard feature, source code customiz...
Learn how to display tag lists on Shopify collection pages by language. This guide provides step-by-step instructions with screenshots on using the RuffRuff Product & Blog Tags app (Regular Pla...
Sales Period Setting
[Updated for 2026] How to Run Limited-Time Sales on Shopify | Selling Period Setting Apps Compared
A detailed guide to setting up limited-time sales on Shopify, plus our recommended apps. Learn the strategies for boosting sales in a short period of time!
[Updated for 2026] How to Run Release Announcements on Shopify | Recommended Apps
Learn how to run release announcements on Shopify and which apps to use. We explain concrete techniques and setup methods to build customer anticipation and boost sales on launch day, along with ti...
Learn the basic setup and usage of the RuffRuff Selling Periods countdown timer. Discover how showing the remaining time can create urgency and boost your conversion rate.