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Security report for nttdocomo-group.com

株式会社NTTドコモ · Telecommunications · Japan

Medium risk. 8 critical or high findings in Email security, Security headers and 3 other checks.

Security score

60/100

Risk levelMedium

0–100, higher is better. How it is calculated

NTTドコモグループの公式ブランディングサイトは、日本の大手通信グループとして、通信技術の進化を基盤に多様なサービスを提供し、社会の豊かさと幸せを目指しています。サイトは日本語で提供され、個人消費者から法人顧客、パートナー企業まで幅広いターゲットに向けた情報を掲載しています。技術的には最新のJavaScriptライブラリやGoogle Tag Managerを活用し、Amazon AWSをホスティング基盤として利用していることが推察されます。サイトはモバイル対応も良好で、SEOやアクセシビリティも基本的に整っています。セキュリティ面ではHTTPSが適切に設定されているものの、DNSSEC未対応やセキュリティヘッダーの不足が見られます。プライバシーポリシーや利用規約は整備されているものの、クッキー同意メカニズムは未確認です。ドメインは非常に新しく、2024年8月に登録されたため、ブランドの歴史と比較すると若いですが、これは新しいブランドサイトとして妥当と考えられます。総合的に見て、サイトは高品質で信頼性が高く、主要な改善点はセキュリティ強化とプライバシー対応の拡充にあります。

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

8 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

Need hands-on remediation? Email guard@offseq.com

Keep watching nttdocomo-group.com

This scan found 27 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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Recommended

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
77
Security headers
15
Email security
60
DNS health
55
Network security
100
GDPR outside view
53
Average
60

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention nttdocomo-group.com, from OffSeq Breach.

No leaked records found

Breach holds no records for nttdocomo-group.com right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

NTTドコモグループは日本の通信業界における主要プレイヤーであり、個人向け通信サービスから法人向けICTソリューション、グローバル展開まで多角的に事業を展開しています。グループ内に複数の子会社を持ち、それぞれが専門分野でサービスを提供。ブランドスローガン「つなごう。驚きを。幸せを。」に象徴されるように、通信を通じた社会貢献とイノベーションを重視しています。サイトからはパートナーシップや社会的価値創造に注力していることが読み取れ、法人顧客や生活者をターゲットにした多様なソリューション提供が強みです。競合他社との差別化としては、グループ全体の連携と幅広い事業領域が挙げられます。

Security posture

サイトはHTTPSを適切に利用し、ドメインはclientTransferProhibitedステータスで保護されていますが、DNSSECが未設定である点はセキュリティ強化の余地があります。セキュリティヘッダーの設定状況は不明であり、明示的なセキュリティポリシーやインシデント対応情報も公開されていません。Google Tag Managerを利用しているため、外部スクリプト管理は行われていますが、クッキー同意やユーザートラッキングに関する透明性は限定的です。全体としては標準的な企業サイトのセキュリティ水準を満たしていますが、先進的なセキュリティ対策の導入が推奨されます。

Recommendations

  1. DNSSECを有効化し、ドメインのセキュリティを強化すること。
  2. Content-Security-PolicyやX-Frame-Optionsなどのセキュリティヘッダーを導入し、ウェブ攻撃リスクを低減すること。
  3. サイト訪問者に対するクッキー同意バナーやプライバシー設定の明示的な実装を検討すること。
  4. セキュリティポリシーやインシデント対応連絡先を公開し、透明性と信頼性を向上させること。
  5. 定期的なセキュリティ監査と脆弱性スキャンを実施し、最新の脅威に対応できる体制を整備すること。
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
株式会社NTTドコモ
Description
NTTドコモグループは通信技術の進化を基盤に多様なサービスを提供し、社会の豊かさと幸せを目指す日本の大手通信グループ。個人向け通信サービス、法人向けICTソリューション、グローバル展開など多岐にわたる事業を展開している。
Key services
個人向け通信サービス, 法人向けICTサービス・ソリューション, スマートライフサービス, 国際通信事業, ソフトウェア開発・保守・運用
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.7.1, Slick Carousel, CreateJS, Google Tag Manager, Adobe Animate (for animations)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Domain status clientTransferProhibited
  • Use of Google Tag Manager for controlled script loading

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professionally presented in Japanese with clear corporate branding.
  3. No direct contact emails or phone numbers found on the main page.
  4. Privacy policy and terms of service are present and linked.
  5. No explicit cookie consent mechanism detected.
  6. Use of modern JavaScript libraries and Google Tag Manager for analytics.
  7. No security.txt or explicit vulnerability disclosure found.
  8. No social media links explicitly found in the provided HTML.
  9. No explicit incident response or security contact information found.
  10. Domain DNSSEC is not enabled, which is a minor security gap.
Technical notes

Notes

サイトはjQueryやSlick Carousel、CreateJSなどのモダンなJavaScriptライブラリを活用し、アニメーションやカルーセル表示を実装しています。Google Tag Managerを利用して分析ツールを管理しており、パフォーマンスは中程度でモバイル対応も良好です。CMSの利用は検出されず、ホスティングはAmazon AWSのDNSサーバーを利用していることから信頼性の高いインフラが想定されます。SEO対策として適切なメタタグやOGPタグが設定されており、アクセシビリティは基本的なレベルで確保されています。今後はパフォーマンス最適化やアクセシビリティ強化の余地があります。
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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