Stable signalNo paid features detectedLow-risk permissions

e-Tax AP

ICカードリーダライタが接続されたパソコンからマイナンバーカードを利用したe-Taxへのログインや、電子証明書の発行機関が提供するICカードを利用した申告・申請等データへの署名、申請データ作成時のCSVファイル等を読込む機能等を提供するアプリケーションです。

Users2MCurrent public install base

Rating1.3Store average score

Reviews828Public review volume

Manifest version--Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

e-Tax AP Media preview

1 assets

Trend

User growth trend

Review user movement across collected snapshots.

User Growth Over Time

Rating trend

7-day rating trend

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7-day rating change

Start

1.28

Latest

1.28

7-day rating change

0.00

2026年7月15日2026年7月21日

Growth overview

Daily, weekly, and monthly growth

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1-day growthFlat

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7-day growthFlat

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30-day growthFlat

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Technical snapshot

Version, languages, and crawl freshness

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Languages0Unknown

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Overview

Product summary

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Reviews

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Store average score1.3Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average1.2Average computed only from synced review bodies below

Reviews with text645Synced review bodies

Total ratings / reviews828Chrome Web Store public rating/review count

Store average score: 1.3. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

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588

Shih-Po Wang2025年1月19日

ゴミ

Yuusei Hisatomi2025年1月16日

使えない　使えるように作り直してほしい

wagonr2025年1月13日

ESET Internet Security を利用していると、拡張機能のインストールがエラーになります。パッケージが無効です 'crx_file_not_readable'　となりました。保護を一時停止では状態は変わらず、ESET Internet Securityを一度アンインストールをして拡張機能をインストールしたら、問題なくインストール完了しました。その後再び、ESET Internet Securityをインストール。 ESETの問題かもしれないが、マイナポータル側に情報がないのはイマイチ。

YO SA2025年1月10日

イータックスのサイト通りにやりましたがエラーで全く読み込みません

Hi Tsu2025年1月10日

起動しません

BAI2024年12月7日

ゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミゴミ！！！！！！！！

木もれび2024年12月6日

全く使い物にならない

- SHTF2024年12月1日

起動しない話にならん

ナオヤん2024年11月28日

改善して欲しい。。。。。。。。。。。。。。。。。。。。全部

st l2024年11月21日

发生了js错误，登录画面完全无法显示 Uncaught Error: Could not load 'dojo.nls.etaxweb_dlparts_zh-cn'; 显然没怎么做测试就把这东西给发布出来了

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AI product read

Chrome extension that bridges the Japanese e-Tax web application with a native Windows application and IC card reader for My Number card authentication and digital signing

Enables Japanese taxpayers to log into the government's e-Tax electronic tax filing system and digitally sign tax filings/applications using their My Number card and IC card reader through Chrome, which otherwise cannot directly access hardware card readers

User installs the extension and a companion native Windows app. When visiting e-Tax websites (login.e-tax.nta.go.jp, keisan.nta.go.jp, etc.), the content script injects hidden elements for communication. The web page dispatches custom events (NtaChromeLaunch) which the content script relays to the background script, which forwards messages to the native app via native messaging. The native app interfaces with the IC card reader to read the My Number card, perform authentication, and return signed data back through the chain.

Target users: Japanese individual taxpayers filing taxes electronically via e-Tax / Japanese tax professionals and accountants / Businesses using e-Tax for corporate tax filings / Users with My Number cards and IC card readers

Chrome Web Store detail was unavailable (API error), so no store description or rating info could be cross-referenced
Cannot verify the native Windows companion app (nta.chrome.ext) as it is distributed separately by the National Tax Agency
Cannot confirm whether the extension works without the native companion app installed

Monetization

No paid features detected

This is an official free government extension from Japan's National Tax Agency (国税庁). No payment, subscription, license, premium, upgrade, or billing-related code was found in any source file. The e-Tax system is a free public service for Japanese taxpayers. The extension has no feature gating or paid tier.

Confidence: 98
Payment platform: --
Source: AI / High
Login required: Yes
Reason: The extension is a bridge to Japan's e-Tax system (login.e-tax.nta.go.jp and related domains). Users must log in to e-Tax using a physical My Number card (マイナンバーカード) and IC card reader. The extension itself has no login UI or account system—it facilitates the connection between the e-Tax web app and a native Windows application that reads the card. The login is required at the destination service (e-Tax) to use the extension's core workflow.

Permission risk

Low-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

未命中敏感权限或广域站点访问规则

Publisher

Unknown publisher

Independent publisher

Email: --
Phone: --
Address: --

Permissions

Host access