We teamed up with Tsun Inc., the Japanese team behind the RuffRuff Shopify apps, on a guide to Mysbox for Japanese merchants. The article went live on Tsun's blog on November 3, 2026: What is Mysbox? Sell lucky bags, kuji and gacha on Shopify (in Japanese).
What the guide covers
The guide is written for Shopify stores that want to sell lucky bags (fukubukuro), kuji and gacha online. It walks through:
- The opening animation, so customers unbox their prize right on the storefront
- Automatic win-rate calculation based on the items you put in each box
- The buyback feature, which lets customers sell unwanted items back at a price you set
- Mysbox pricing plans
- How to set up your first box
Why we wrote it with Tsun
Tsun's blog is read by Japanese Shopify merchants, and its RuffRuff apps help stores run pre-orders, limited releases and member sales. Lucky bags and kuji fit naturally into that way of selling, which made Tsun's blog the right home for a Mysbox guide.
We drafted the article using Tsun's contributor format, our Japan team reviewed the Japanese, and Tsun published it on their blog.
About Tsun Inc.
Tsun Inc. builds and runs RuffRuff, a series of Shopify apps used by more than 15,000 stores in over 90 countries. Tsun was the first Japanese company to earn the Built for Shopify badge, and seven of its apps now carry it, the most of any developer in Japan. In 2025, Tsun was named Ecosystem App Developer of the Year at Shopify Partner of the Year 2025 Japan.
The RuffRuff series has seven apps. Four help with selling and promotions: Pre-orders, Order Limits, Order Bonus and Selling Periods. Three improve blog and content pages: Table of Contents, Product and Blog Tags, and Author Profiles. Every app comes with a free trial and setup support in Japanese.
Open a free box: our BFCM Mystery Box
Want to see Mysbox from the shopper's side? For BFCM, we built our own mystery box with it.
From November 5 to 12, Shopify stores can open one free box each, and every box wins. Prizes include up to 50% off Qikify apps, plus free gifts. There are only 100 boxes, so the campaign may close early.
Read the full guide
You can read Tsun's full guide to Mysbox, in Japanese, on the Tsun blog.
Curious about Mysbox itself? Learn more about Mysbox.
Thank you again to the Tsun team for the collaboration.
