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Pepin

Bookings, invoices — all in Shopify.

Bookings, on-site search, invoices, revenue ranking. Where Shopify leaves Japanese merchants stuck, we build the answer as a Shopify app rather than another SaaS subscription — planned, built, operated and supported in-house.

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  • Four Shopify apps built in-house
  • Japanese UI and support
  • Customer data stays in your store
  • From planning through operation

The Maru series

Apps that close the gaps Shopify leaves for Japanese merchants — admin, docs and support all in Japanese.

Shopify booking app

Maru Booking

Booking calendar, deposits, staff and resource management, and booking confirmations for your customers.

Pricing：Free plan · 7-day trial / from $19.99

Learn moreView on the App Store

Shopify search app

Maru Search

Japanese spelling-variant matching, search across products, blog posts and pages, and search analytics.

Pricing：Free plan · 14-day trial / from $29.99

Learn moreView on the App Store

Shopify invoice app

Maru Invoice

Invoices, delivery notes, receipts and estimates, plus CSV export for accounting and shipping.

Pricing：Free plan · 7-day trial / from $9.99

Learn moreView on the App Store

Shopify ranking app

Maru Sales Ranking

Best-seller rankings published automatically, with attribution and A/B testing.

Pricing：Free plan · 7-day trial / from $12

Learn moreView on the App Store
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Why a Shopify app instead of another SaaS?

  1. 01

    Customer data is never split in two

    Hand a workflow to an outside SaaS and the customer list and history accumulate there. Built as a Shopify app, customers, orders and history stay in one place — your own store — so retention and email are yours to run.

  2. 02

    One admin, not five logins

    Separate services for bookings, search, invoices and revenue analysis mean duplicate records for inventory and customers. Inside the Shopify admin, the daily work happens on one screen.

  3. 03

    Nothing gets lost in translation

    Apps built abroad assume English for the admin, the docs and the support desk. The Maru series is planned, built, operated and supported in Japan, so questions about behaviour or bugs are answered in Japanese.

Projects

Products we plan, build and operate ourselves, centred on Shopify apps.

Shopify Apps
Maru Booking

Maru Booking

A Shopify-integrated booking app. Zero booking fees, 100% customer data ownership.

Shopify Apps
Maru Search

Maru Search

A Japanese search app for Shopify. Searches products, blogs, and pages together; Pro adds review collection, display, replies, review rating filters, and review-powered relevance. Basic $29.99 / Pro $49.99 — 7-day free trial.

Shopify Apps
Maru Invoice

Maru Invoice

Issue invoices, delivery slips, receipts, and estimates from Shopify admin. Adjust tax differences with accounting software down to 1 yen.

Shopify Apps
Maru Sales Ranking

Maru Sales Ranking

Auto-generate best-seller rankings from order data, with collection-specific displays plus Pro attribution and A/B testing.

Web Service
COSMA

COSMA

A cosplay-focused marketplace for costumes, wigs, props, and more, planned, built, and operated by Pepin.

External Link
Collaboration
DE BLANKK

DE BLANKK

Collaboration with DE BLANKK Inc. Direction, design, and coding for their corporate website.

External Link
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Journal

Field notes on running a Shopify store.

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Start by telling us what is stuck.

App questions and broader Shopify questions are equally welcome. Nothing needs to be fully specified yet.

Book a 30-min consultation