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.
全く機能しない、高齢者には不適である。
使えない人は、『拡張機能を管理』に行き修復をクリックすると治る場合がありますよ
この馬鹿なアプリはchromeでは使えなくてedgeでのみ使えた。 いまどきedge使う層なんて紙で郵送するタイプだろ。 老害が偉そうに作らせるからこんなゴミアプリになるんだろうな。
少なくともMacでは一生使えないのだと思う。使えない機能拡張とドライバを国が配布して国民に混乱をもたらしているようなので「違反報告」をしておきました。
どうしたら使えるのか さっぱり分からん サイテー
PC版を使いたいのですが、インストール後どうすれば起動できるのか、いろいろやっても全く不明で、困り果てています。他の方のレビュにも同様なことが書かれていて私だけではなさそう。迅速な対応(起動方法、使用方法の説明)を願いたく。確定申告で使えないと困るんです。
どこがアプリやねん!全く反応せんわ。いくら払って作らせたんや?
中小機構の申し込み時に必要だったのでDLしたが反応せず。 PCやブラウザの再起動後も反応なし。 酷い拡張機能だわ。 デジタル庁は血税の予算を何に使ってるの? 無能な省庁は天下り先になるだけ。
カード認識しません! 色々時間を費やして試しましたが、全く使えません
まともに使えん ちゃんとテストしてるのか? くだらんお役所仕事しやがって