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SGSiteGraph

kobunsha.com

光文社

Last scanned Aug 24, 2026, 1:22 PM

87

Overall score

Great

Summary

総合出版社「光文社」の企業情報です。「光文社」の会社概要・沿革・関連施設や関連企業・アクセスマップをご紹介しています。また「光文社」のパーパスもご�… This website uses WordPress behind CloudFront CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

総合出版社「光文社」の企業情報です。「光文社」の会社概要・沿革・関連施設や関連企業・アクセスマップをご紹介しています。また「光文社」のパーパスもご覧いただけます。

Top issues to fix

8 issues found · 2 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.

  • 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.

  • Meta description longer than 160 characters

    SEO

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

  • robots.txt not found

    SEO

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

+2 more issues — details in the sections below.

85

SEO

3 issue(s) found

100

Performance

555 ms

65

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

総合出版社「光文社」の企業情報です。「光文社」の会社概要・沿革・関連施設や関連企業・アクセスマップをご紹介しています。また「光文社」のパーパスもご覧いただけます。

Meta tags

Title
光文社
Description
総合出版社「光文社」の企業情報です。「光文社」の会社概要・沿革・関連施設や関連企業・アクセスマップをご紹介しています。また「光文社」のパーパスもご覧いただけます。
Canonical
https://www.kobunsha.com/
Language
ja
Charset
UTF-8
Viewport
width=device-width
Robots meta
index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
光文社
og:description
総合出版社「光文社」の企業情報です。「光文社」の会社概要・沿革・関連施設や関連企業・アクセスマップをご紹介しています。また「光文社」のパーパスもご覧いただけます。
og:type
website
og:url
https://www.kobunsha.com/

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

WordPressGoogle AnalyticsApache

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
kobunsha.com
Valid from
Dec 8, 2025
Valid to
Jan 6, 2027
Days until expiry
134
SAN domains
kobunsha.com, *.kobunsha.com

Security headers

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

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 4 · H3 20

Links

36 internal · 25 external · 20 broken

Images

57 total · 0 missing alt

Scripts / Styles

6 scripts · 4 stylesheets

JS / CSS size

722 B · 13.0 KB

Page size

59.7 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
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://kobunsha.com
Final URL
https://www.kobunsha.com/
HTTP status
200
HTTP version
HTTP/2
Response time
554 ms
HTML size
59.7 KB
Redirect chain
https://kobunsha.com → https://www.kobunsha.com/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does kobunsha.com use?
kobunsha.com is built with WordPress, Google Analytics, Apache.
Is kobunsha.com secure (HTTPS)?
Yes. kobunsha.com uses TLS 1.3 with a certificate issued by Amazon, valid until Jan 6, 2027.
Who hosts kobunsha.com?
Hosting provider information for kobunsha.com is not available yet.
What is kobunsha.com's SEO score?
kobunsha.com scored 85/100 for SEO in the latest analysis (great).
What is kobunsha.com's overall website score?
kobunsha.com has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.