This page is not an official page of the app or its developer, but an independent editorial publication created for informational and commentary purposes. Unless expressly stated otherwise, neither the app nor its developer is affiliated with, endorsed by, sponsored by, authorized by, or otherwise officially connected with MWM, Apple, Google Play, the app publisher, or the app's developer, and nothing on this page implies that the app was developed using MWM's services. Any trademarks, logos, screenshots, and other content remain the property of their respective owners.

Graffer電子署名アプリ

Skip the city hall visits and sign administrative documents in seconds. Securely verify your identity with your My Number Card directly from your smartphone, anytime, anywhere.

Key Figures

Downloads

380K+

User Rating

2.0/5

Total Ratings

200

Publisher

Graffer, Inc.

Government Procedures, Done in Minutes

The modern way to handle administrative filings. Securely sign official documents using your My Number card directly from your iPhone, anywhere in the world.

Seamless NFC Integration

No bulky card readers required. Simply tap your My Number card to your iPhone for instant, secure authentication via the built-in NFC chip.

Enterprise-Grade Security

Your privacy is our priority. We are ISO 27001 certified and never store personal information or My Number data on your device or our servers.

FAQ

Frequently Asked Questions

Everything you need to know about Graffer電子署名アプリ

What is the Graffer電子署名アプリ?

The Graffer電子署名アプリ enables electronic signatures using your My Number Card for official applications on government websites. It acts as a secure identity verification tool for digital public services.

What are the requirements for using Graffer電子署名アプリ?

To use the Graffer電子署名アプリ, you need a My Number Card, your 6-digit or longer PIN for the electronic signature certificate, and an NFC or Felica compatible smartphone.

How does the Graffer電子署名アプリ facilitate electronic signatures?

The Graffer電子署名アプリ works by requiring you to input your PIN, read your My Number Card with your smartphone, and then confirm your address and name from the card's IC chip to complete the signature.

Does the Graffer電子署名アプリ store personal information?

No, the Graffer電子署名アプリ does not store personal information or My Number data within the application. Its design prioritizes user privacy and data security during the verification process.

Which browser is recommended for use with Graffer電子署名アプリ?

The Graffer電子署名アプリ recommends using the latest version of Safari. Using web browser features like incognito or private browsing modes is not supported, as they can prevent proper app-browser cooperation.

What should I do if Graffer電子署名アプリ fails to read my My Number Card?

If the Graffer電子署名アプリ cannot read your My Number Card, remove your iPhone's case, place the card face up on a table, align the iPhone's top edge with the card's photo line, and hold them still for 5 to 10 seconds.

What is the PIN for the electronic signature certificate in Graffer電子署名アプリ?

The PIN for the electronic signature certificate is an alphanumeric code, 6 to 16 characters long. You establish this PIN at the municipal office when you receive your My Number Card.

The following screenshots and description are sourced directly from the app's official store listing and are the property of the app developer.

App Store

Screenshots

Graffer電子署名アプリ - Smartphone screen showing step by step instructions on how to scan a Japanese My Number card for digital signature — Smartphone screen showing step by step instructions on how to scan a Japanese My Number card for digital signature

Graffer電子署名アプリ - Mobile app screen instructions requesting a My Number card and a password of 6 or more characters for digital signature preparation. — Mobile app screen instructions requesting a My Number card and a password of 6 or more characters for digital signature preparation.

Graffer電子署名アプリ - Step-by-step flowchart showing the 4-step process for using the Graffer Digital Signature app with government websites — Step-by-step flowchart showing the 4-step process for using the Graffer Digital Signature app with government websites

Graffer電子署名アプリ - Security and privacy information page for the Graffer app showing ISO 27001 and Privacy Mark certifications. — Security and privacy information page for the Graffer app showing ISO 27001 and Privacy Mark certifications.

Graffer電子署名アプリ - Smartphone screen showing step 1 of the Graffer electronic signature process where users enter their 6 digit alphanumeric PIN. — Smartphone screen showing step 1 of the Graffer electronic signature process where users enter their 6 digit alphanumeric PIN.

Graffer電子署名アプリ - An instructional screen showing how to align a smartphone over a My Number card for digital scanning and signature verification. — An instructional screen showing how to align a smartphone over a My Number card for digital scanning and signature verification.

Graffer電子署名アプリ - A smartphone screen showing the third step of the identity verification process where the user confirms their name and address read from a My Number card. — A smartphone screen showing the third step of the identity verification process where the user confirms their name and address read from a My Number card.

Graffer電子署名アプリ - Guide explaining the password for My Number card electronic signatures. — Guide explaining the password for My Number card electronic signatures.

Description

■電子署名とは電子署名とは、マイナンバーカードを使用した本人確認です。自治体のWebサイトで申請に必要な内容を入力した後、このスマホアプリを使用して電子署名を行います。 ■ご利用に必要なもの・マイナンバーカード・暗証番号（6けた以上）：署名用電子証明書用暗証番号（6けた以上）は、市区町村の窓口でマイナンバーカードを受け取った際に、設定した6〜16文字の英数字です ■電子署名の方法 1. 暗証番号（6けた以上）を入力します 2. スマートフォンでマイナンバーカードのICチップを読み取ります 3. マイナンバーカードのICチップ内の住所と氏名を確認します ■セキュリティ・アプリ内に個人情報やマイナンバーは保存されません・運営会社の株式会社グラファーはプライバシーマークとIS 689557 / ISO 27001を取得しています ■対応機種 NFCまたはFelicaに対応したスマートフォン ■推奨ブラウザこのアプリは、自治体のWebサイトで必要な情報を入力した後に電子署名を行うサービスです。正常に電子署名を行うためには、自治体のWebサイトで入力する際、推奨ブラウザを使用する必要があります。・「Graffer 電子署名アプリ」の推奨ブラウザ Safari（最新版） ※シークレットモードやプライベートモードなどの、Webブラウザの機能が制限されるモードは、Webブラウザとアプリの連携ができないため、電子署名が行えません。 ■運営会社株式会社グラファーは「プロダクトの力で行動を変え社会を変える」を経営理念に掲げ、行政サービスを中心とした社会のデジタル化を推進しています。・コーポーレートサイト：https://graffer.jp/ ・情報セキュリティ方針：https://graffer.jp/legal/isms-policy ・プライバシーポリシー：https://graffer.jp/legal/privacy-policy —------------------------------------------------------------ ■マイナンバーカードが読み取れない場合次の手順で読み取りをお試しください。 1. iPhoneのケースを外す 2. 写真の面を上にしてマイナンバーカードを机の上に置く 3. 写真の上の線とiPhoneの上の端を合わせる 4. マイナンバーカードとiPhoneをぴったり重ねるマイナンバーカードとiPhoneの間に隙間があったり、iPhoneを動かしたりすると読み取れません。 5. 5から10秒で読み取りが完了しますさらに詳しい読み取り方法は、よくあるご質問ページをご確認ください。 https://graffer.jp/faq/smart-apply/60a4c6cff472370008b77763