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。

Users2M

Rating1.3

Reviews813

Manifest version--

7-day growth0

7-day growth rate0%

Preview

e-Tax AP Media preview

1 assets

Trend

30-day user trend

Review user movement over the last 30 days.

User Growth Over Time

Rating trend

30-day rating change

Track rating movement over time to see whether quality signals remain stable.

30-day rating change

Start

1.28

Latest

1.28

30-day rating change

0.00

2026年5月29日2026年6月4日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthFlat

00%

7-day growthFlat

00%

30-day growthNo data

----

Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version--

Manifest--

Size--

Languages0Unknown

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

The Chrome Web Store shows 813 reviews, but only 0 review bodies have synced into ExtScope so far. Showing the synced reviews available right now.

5★

4★

3★

2★

1★

Similar and related extensions

Review related products from the Chrome Web Store detail page.

No related extensions are available yet

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