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SGSiteGraph

idolmaster-official.jp

【公式】アイドルマスター ポータル（アイマス）

Last scanned Aug 7, 2026, 6:00 AM · 6 views

76

Overall score

Fair

Summary

「アイドルマスター（アイマス）」シリーズの、最新情報やイベントスケジュール、グッズやメディア掲載情報など、アナタの気になるアイドルの情報満載！. This website uses Next.js behind CloudFront CDN. SEO is fair (55/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

「アイドルマスター（アイマス）」シリーズの、最新情報やイベントスケジュール、グッズやメディア掲載情報など、アナタの気になるアイドルの情報満載！

Top issues to fix

12 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Title longer than 60 characters

    SEO

    Shorten the title to under 60 characters so search results don't truncate it.

+6 more issues — details in the sections below.

55

SEO

7 issue(s) found

100

Performance

5 ms

65

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Score history

+6 overall since Jul 26, 2026

Overall
76
SEO
55
Security
65
Performance
100
Accessibility
90

Organization

Company details published in this site's own structured data.

「アイドルマスター（アイマス）」シリーズの、最新情報やイベントスケジュール、グッズやメディア掲載情報など、アナタの気になるアイドルの情報満載！

X (Twitter)X (Twitter)YouTubeX (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)

Meta tags

Title
【公式】アイドルマスター ポータル（アイマス）
Description
「アイドルマスター（アイマス）」シリーズの、最新情報やイベントスケジュール、グッズやメディア掲載情報など、アナタの気になるアイドルの情報満載！
Canonical
Language
ja
Charset
utf-8
Viewport
width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no
Robots meta
index,follow
Manifest
https://idolmaster-official.jp/manifest.json

OpenGraph & Twitter Card

OpenGraph

og:title
【公式】アイドルマスター ポータル（アイマス）
og:description
「アイドルマスター（アイマス）」シリーズの、最新情報やイベントスケジュール、グッズやメディア掲載情報など、アナタの気になるアイドルの情報満載！
og:type
website
og:url
https://idolmaster-official.jp/

Twitter Card

twitter:card
summary_large_image
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Next.js

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
*.idolmaster-official.jp
Valid from
Jul 22, 2026
Valid to
Feb 4, 2027
Days until expiry
181
SAN domains
*.idolmaster-official.jp, idolmaster-official.jp

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 10 · H3 11

Links

47 internal · 45 external · 3 broken

Images

152 total · 0 missing alt

Scripts / Styles

60 scripts · 8 stylesheets

JS / CSS size

1.2 KB · 107 KB

Page size

78.6 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://idolmaster-official.jp
Final URL
https://idolmaster-official.jp
HTTP status
200
HTTP version
HTTP/2
Response time
4 ms
HTML size
78.6 KB
Redirect chain
https://idolmaster-official.jp

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does idolmaster-official.jp use?
idolmaster-official.jp is built with Next.js.
Is idolmaster-official.jp secure (HTTPS)?
Yes. idolmaster-official.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Feb 4, 2027.
Who hosts idolmaster-official.jp?
Hosting provider information for idolmaster-official.jp is not available yet.
What is idolmaster-official.jp's SEO score?
idolmaster-official.jp scored 55/100 for SEO in the latest analysis (fair).
What is idolmaster-official.jp's overall website score?
idolmaster-official.jp has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
Has idolmaster-official.jp's score changed over time?
idolmaster-official.jp's overall score has improved by 6 points (from 70 to 76) since Jul 26, 2026.