Trend User growth trend Review user movement across collected snapshots.
User Growth Over Time 2M 2M 2M 2M 2M 2026年7月13日 2026年7月16日 2026年7月19日 Latest: 2M
Rating trend 7-day rating trend View collected rating snapshots from the latest 7-day window to assess rating stability.
7-day rating change 1.18 1.23 1.28 1.33 1.38 2026年7月13日 2026年7月16日 2026年7月19日 Latest: 1.28
2026年7月13日 2026年7月19日
Growth overview Daily, weekly, and monthly growth Compare 1-day, 7-day, and 30-day net growth and growth rate.
Technical snapshot Version, languages, and crawl freshness Review publication date, version, supported languages, and crawl timestamps.
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Languages 0 Unknown
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Overview Product summary Review the store description, core capabilities, and common use cases.
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。
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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.
Connect to native Windows app (nta.chrome.ext) via Chrome native messaging for IC card reader communication Enable My Number card-based login to e-Tax (login.e-tax.nta.go.jp) Facilitate digital signing of tax filings and applications using electronic certificates on the card Support CSV file loading for tax application data preparation Bridge communication between e-Tax web pages and the native card reader application
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.
LOW
Publisher Unknown publisher Independent publisher
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Host access No host access data
判らない。電話相談できる所はないのか？
時短の為のオンラインのはずなのに使いづらいにもほどがある、意図的に使いづらくしてるのでしょうか。 そうすれば延滞金も発生しますしね。
昨年はdataが同じでも還付金が異なることがあった。 そのために、ソフト更新は必要だが始動が昨年と異なり動かないで困っている。 毎年変わるソフトに追従できないので、eｰtaxをあきらめるかの瀬戸際になっている。
クソ使いにくい わざとやってんのか
拡張機能入ってるのに入ってないって何？オンライン申請使わせる気ないやろ
使えたよ？ だけど、PCにインストールもさせて、さらに拡張機能もって...そんなに必要？
まず、使える人と使えない人がいますが、これはAPIのため、用途が多数存在します。 少なくとも、証明書の発行には使えました。
信じられないような使い勝手。時間を返して欲しい。
使えませんでした。残念です。
全然使えねー