---
title: "Checkout Address Validator JP Shopify App Profile"
description: "For stores outside Japan shipping to customers in Japan. Shopify fills in the prefecture and city from a postal code but does not check the town or the house number, so typos become label errors. The app checks the address typed in Latin letters against Japan Post data inside the checkout. Errors appear under the field with the expected value and are fixed before ordering. Spelling variations are accepted. Works on every Shopify plan. No customer data is stored on our servers."
canonical_url: "https://shoplist.co/shopify-apps/-36"
markdown_url: "https://shoplist.co/shopify-apps/-36.md"
last_updated: "2026-10-23"
entity_type: "shopify_app"
slug: "-36"
source: "public Shopify app profile allowlist"
---

# Checkout Address Validator JP Shopify App Profile

> For stores outside Japan shipping to customers in Japan. Shopify fills in the prefecture and city from a postal code but does not check the town or the house number, so typos become label errors. The app checks the address typed in Latin letters against Japan Post data inside the checkout. Errors appear under the field with the expected value and are fixed before ordering. Spelling variations are accepted. Works on every Shopify plan. No customer data is stored on our servers.

## Quick answer
Checkout Address Validator JP has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: Checkout Address Validator JP
- Monitoring status: Storefront detection limited
- Developer: Flatto Inc.
- Developer profile: https://shoplist.co/app-developers/appbrew-labs
- Shopify App Store URL: https://apps.shopify.com/checkout-address-validator
- Website: https://flatto.dev/en/checkout-address-validator/
- Launch date: February 9, 2024
- Shoplist category: Shipping & Fulfillment
- Rating: 5
- Review count: 22
- Free plan signal: Yes
- Free trial signal: Yes

## Pricing summary
Free: Free; Standard: $17.99/month; Growth: $39.99/month; Enterprise: $99.99/month

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## Public callouts
- Character Limit Function
- 郵便番号から正しい住所をチェック。\(「ケ」「数字」「住所重複」「郵便番号と住所不一致」等を検知してエラーメッセージを表示可能\)
- Function to trigger an error when specific phrases are included
- 文字数制限\(配送先が日本の場合のみ発動させる設定が可能\)
- Function to set a list of valid postal codes and error out all others.
- 設定した文字列の入力禁止
- 全角ハイフン・長音記号等を禁止\(半角ハイフンのみ許可\)
- 全角数字の入力禁止
## Shopify App Store categories
- Notifications - Other
- Shipping solutions - Other

## Data note
Profile updated: October 23, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-10-30 15:35:19.576806\+00
Detection metrics refreshed: 2026-10-30 14:53:23.662062\+00
Public app evidence date: 2026-10-23 01:55:23.550382\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/-36)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)