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.
去年は何とか確定申告が出来たのに、今年はエラー出まくりで全く進めない。 その対処方法のサイトの説明も何言っているのか、日本語になっていない。 このままだと今年度の確定申告ができない。 ゼロ☆評価にしたいが出来ないので最低点。PC版もスマホ版も最悪なソフト。
役所の象徴とはいえ、よくこんな使いづらいアプリを作ると感心してしまう・・・ この時代に紙とペンを使って窓口でやれ、といわれているようなもの 以前はもっと簡単だった。だんだん使いづらくなるのはどうしてかな?
さいあく!全く使えない! 使い方がわからん!せっかくカードリーダーを買ったのに使えないのでむだな出費になってしまった。 年寄りにもわかりやすくしてほしい。
操作がありえないくらい面倒。作業に進むまでのほうが大変ってどういうことですか
まったくやりたいところに行きつかない よけいなものが多すぎる 何が簡単なのか理解できない
日本の公的機関は無駄でいらない仕事を多めに作る必要があるところだけど、それと同じ感覚でソフトを作ってはいけない。 無駄だらけ。 無駄は公的機関以外では嫌われるものだと認識してもらいたい。
使いにくく、最低なソフト。
ゴミ
クロームへ入らないと使えないらしい、使いたくないので中止
去年まで普通にできていたのに再インストールからやらされた。そして拡張機能が全く入らない、確定申告できません。何とかして下さい。