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SGSiteGraph

diamond.jp

ダイヤモンド・オンライン

Last scanned Jul 31, 2026, 8:00 PM · 5 views

85

Overall score

Great

Summary

ダイヤモンド社のビジネスパーソン向け情報サイト。業界を深掘りした独自特集、経営・経済・マネー情報やスキルアップ記事を提供し、ビジネスリーダーの意思�… This website uses Google Ads. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

ダイヤモンド社のビジネスパーソン向け情報サイト。業界を深掘りした独自特集、経営・経済・マネー情報やスキルアップ記事を提供し、ビジネスリーダーの意思決定や課題解決に応えます。

Top issues to fix

7 issues found · 2 high priority

  • 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.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

65

SEO

5 issue(s) found

100

Performance

137 ms

90

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Score history

+1 overall since Jul 24, 2026

Overall
85
SEO
65
Security
90
Performance
100
Accessibility
90

Organization

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

ダイヤモンド社のビジネスパーソン向け情報サイト。業界を深掘りした独自特集、経営・経済・マネー情報やスキルアップ記事を提供し、ビジネスリーダーの意思決定や課題解決に応えます。

X (Twitter)Facebook

Meta tags

Title
ダイヤモンド・オンライン
Description
ダイヤモンド社のビジネスパーソン向け情報サイト。業界を深掘りした独自特集、経営・経済・マネー情報やスキルアップ記事を提供し、ビジネスリーダーの意思決定や課題解決に応えます。
Canonical
https://diamond.jp/
Language
ja
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
max-image-preview:large
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
ダイヤモンド・オンライン
og:description
ダイヤモンド社のビジネスパーソン向け情報サイト。業界を深掘りした独自特集、経営・経済・マネー情報やスキルアップ記事を提供し、ビジネスリーダーの意思決定や課題解決に応えます。
og:type
website
og:url
https://diamond.jp/

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

Google Ads

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

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

TLS / SSL certificate

Version
TLS 1.3
Issuer
GlobalSign nv-sa
Subject
*.diamond.jp
Valid from
Jan 19, 2026
Valid to
Feb 20, 2027
Days until expiry
203
SAN domains
*.diamond.jp, diamond.jp

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 36 · H3 35

Links

131 internal · 31 external · 20 broken

Images

74 total · 0 missing alt

Scripts / Styles

20 scripts · 1 stylesheets

JS / CSS size

14.0 KB · 70.7 KB

Page size

183 KB

Robots.txt & Sitemap

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

SEO issues

  • Meta description longer than 160 characters
  • 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://diamond.jp
Final URL
https://diamond.jp
HTTP status
200
HTTP version
HTTP/2
Response time
134 ms
HTML size
183 KB
Redirect chain
https://diamond.jp

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Frequently asked questions

What technology does diamond.jp use?
diamond.jp is built with Google Ads.
Is diamond.jp secure (HTTPS)?
Yes. diamond.jp uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Feb 20, 2027.
Who hosts diamond.jp?
Hosting provider information for diamond.jp is not available yet.
What is diamond.jp's SEO score?
diamond.jp scored 65/100 for SEO in the latest analysis (fair).
What is diamond.jp's overall website score?
diamond.jp has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
Has diamond.jp's score changed over time?
diamond.jp's overall score has improved by 1 point (from 84 to 85) since Jul 24, 2026.