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.
使い勝手が悪すぎる、デジタル庁の責任を問うべき
星つける価値なし! アプリをダウンロードしてもchromeに追加ボタンが表示されない! こんなの入る前の普通にパソコンで作成して送った今までのがやりやすかったし、なぜかカードリーダーも使える機種なのに読み取らず謎だらけ。こんなの導入してそれこそ税金の無駄。
どこで完成なのかわからない! 折角リーダーを買ったのに
折角ICカードリーターを買ったのに、今までのように手作業でパソコンで入力したほうが早い。次に何をしたらいいかの指示が分からないです!
ただ一言、ふざけんな!
99%評価できない。全く、操作不可能これでは何のためか理解に苦しむ。ソフトが開かない。
操作が分かりにくいうえに何度もログインさせられる。イライラしてるときにウサギのアイコンが出てくるとさらにむかつく。毎年嫌な思いをさせられるので確定申告が億劫になる。 それとこのレビューも星を最低1つつけないと投稿できない仕組みなので、星ゼロでも投稿できるようにしてください。 マイナス評価にしたいくらいです。
操作が全く分からない 理解できる人の割合は何パーセント?
全く指示の様にならない。なぜ文章にしないのか。何処の何をどうせと言っているのかわからない。単語を羅列して紙背を読め、方式ではだめだ。
なれないので時間はかかる。