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SGSiteGraph

nhk-book.co.jp

NHK出版

Last scanned Aug 24, 2026, 1:23 PM

76

Overall score

Fair

Summary

This website uses Apache. SEO is fair (50/100) and accessibility is good (80/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: Missing meta description.

Top issues to fix

11 issues found · 3 high priority

  • Missing Content-Security-Policy header

    Security

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

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • 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.

  • 3 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • No structured data (JSON-LD) found

    SEO

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

+5 more issues — details in the sections below.

50

SEO

7 issue(s) found

90

Performance

1.20 s

90

Security

HTTPS & header checks

80

Accessibility

2 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.

Meta tags

Title
NHK出版
Description
Canonical
Language
Charset
utf-8
Viewport
width=device-width
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

jQueryMeta PixelApache

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
Cybertrust Japan Co., Ltd.
Subject
*.nhk-book.co.jp
Valid from
Feb 4, 2026
Valid to
Feb 28, 2027
Days until expiry
186
SAN domains
*.nhk-book.co.jp, nhk-book.co.jp

Security headers

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

Compression: gzip · 3 cookie(s) observed

Content & assets

Headings

H1 0 · H2 10 · H3 4

Links

53 internal · 21 external · 20 broken

Images

56 total · 3 missing alt

Scripts / Styles

15 scripts · 4 stylesheets

JS / CSS size

669 B · 0 B

Page size

47.7 KB

Robots.txt & Sitemap

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

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found
  • Missing <html lang> attribute

Scan details

Requested URL
https://nhk-book.co.jp
Final URL
https://www.nhk-book.co.jp/
HTTP status
200
HTTP version
HTTP/2
Response time
1.20 s
HTML size
47.7 KB
Redirect chain
https://nhk-book.co.jp → https://www.nhk-book.co.jp/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does nhk-book.co.jp use?
nhk-book.co.jp is built with jQuery, Meta Pixel, Apache.
Is nhk-book.co.jp secure (HTTPS)?
Yes. nhk-book.co.jp uses TLS 1.3 with a certificate issued by Cybertrust Japan Co., Ltd., valid until Feb 28, 2027.
Who hosts nhk-book.co.jp?
Hosting provider information for nhk-book.co.jp is not available yet.
What is nhk-book.co.jp's SEO score?
nhk-book.co.jp scored 50/100 for SEO in the latest analysis (fair).
What is nhk-book.co.jp's overall website score?
nhk-book.co.jp has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.