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.
Worked fine for me. I had already bought an IC card reader for submitting things to the government online, so I had the Windows drivers already installed and working. So it worked fine the first time.
コメントを書くに値しない最悪のソフト、システムです。
e-taxの申請をパソコンで開始したら、すぐにこの画面で堂々巡りだ。
意味わからんできませんが
流石IT後進国って出来、レビューの苦情を見てやっと正常にログイン ただでさえ面倒でやりたくない、仕方なくやってる確定申告の準備段階でやる気を削ぎにきてるどうしようもない欠陥品
一旦古いバージョンを削除すれば、問題なくインストールできます。 解決のための努力もせず、酷評するのはおかしいと思います。
何回もインストール出来ない。 エッジはまったく反応されない 電話も出ない 確定申告期間くらい24時間対応できないですか? 議員は納税義務がないみたいですけど 、対応次第では来年から大変ですよ
最悪。何度やってもダウンロード,インストールを延々とさせられる
星すら付けたくない、時間の無駄だった。
こんなに使えないアプリ作ったやつは確実にバカだな・・ まあ国民を パカにてる(←誤字で無い) としか思えない