AI product readBrowser bridge/launcher enabling My Number Card (マイナンバーカード) digital authentication on Japanese government online services via native messaging to a local card reader application
Japanese residents need a way to use their physical My Number Cards for digital authentication on various government web portals (e-tax, local government services, etc.) through Chrome. The extension acts as a communication bridge between government web pages and the native My Number Card reader application.
User visits a government service website → the website detects the extension via a hidden input element → the website dispatches a 'launchApp' custom event → the content script forwards this to the background service worker → the service worker connects to the native 'jp.go.cao.mpa' messaging host → the native app communicates with the physical card reader to read the My Number Card and request PIN → authentication result is returned through the chain back to the government website.
Injects extension detection signals into government web pages so they can confirm the bridge is installedRelays authentication requests from government websites to the native My Number Card reader app (jp.go.cao.mpa) via Chrome native messagingReturns authentication results from the native app back to the government web pageHandles cleanup/disconnection when pages are unloadedSupports 24+ government and related service domains (*.go.jp, e-taxrenkei.jp, local government portals, etc.)
- Target users
- Japanese residents who need to authenticate with online government services using their My Number Card / Users filing taxes, applying for certificates, or accessing local government online portals in Japan
- Extension is very small (4 text files, ~8KB of source), making analysis straightforward
- The native host application (jp.go.cao.mpa) source is not included and is distributed separately via a dedicated installer, so its internals cannot be verified
- No popup UI exists — the extension operates entirely as a content script + background service worker bridge
MonetizationNo paid features detected
No evidence of any paid features, payment platforms, subscriptions, or premium tiers in the extension code. This is a government-provided (内閣府 / Cabinet Office) free tool for enabling My Number Card authentication on government services. The 'pro' keyword hit is only in verified_contents.json metadata and is unrelated to payment.
- Confidence
- 95
- Payment platform
- --
- Source
- AI / High
- Login required
- Yes
- Reason
- The extension is a bridge that enables My Number Card (マイナンバーカード) authentication on Japanese government online services. The extension itself has no login UI, but its core workflow requires the user to authenticate via a physical My Number Card + PIN on destination government services (e.g., *.go.jp tax portals, local government sites). The native host app 'jp.go.cao.mpa' handles the card reader interaction, and the government websites require My Number Card-based identity verification to complete any workflow.
さすが㋰野有が作り出した九素アプリなだけありますね。 財務省自体が称える日本海の斜め上なだけありますね。 国民が汗水たらして働いて手にした大事な資金を財務省は㋰田にするのが、凄ーく好きですね。
分かり肉すぎます
なんでPCもブラウザも変えてないのに毎年インストールしないといけないんですかね? 税金使ってこんなのしか出来ないのか、アプリ開発業者との癒着でもあるのか疑いたくなるレベル。
この画面は、何を意味するのですか。
なんでこんなに使いずらい、マイナンバーをセットしたらすぐに起動できるようにしてください。 マイナンバー作業したくなくなるソフトです
操作方法が判り難い! もっと簡単に情報が取れる様に出来ないの?
全く認識してくれませんでした。残念ながら削除したので文字通りゴミでした。。。
デジタル庁に巨額の税金を使ってこの程度のソフトしか作れないんですね。
だめだこりゃ
悲しくなるほどゴミ。こんなのもまともに動く物を作れない日本はもう完璧に後進国。