steranet.jp
ステラnet | NHK財団が運営するネットメディア
Last scanned Jul 26, 2026, 12:49 PM
Overall score
Great
Summary
大河ドラマ・朝ドラをはじめ、NHK番組の最新情報をご提供します。撮影裏話や出演者の素顔がわかるインタビュー、専門家の解説、番組レビューなど独自記事を多�… This website uses WordPress behind CloudFront CDN. SEO is good (85/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Meta description longer than 160 characters.
大河ドラマ・朝ドラをはじめ、NHK番組の最新情報をご提供します。撮影裏話や出演者の素顔がわかるインタビュー、専門家の解説、番組レビューなど独自記事を多数掲載。NHK財団の社会貢献活動もご紹介。メディアリテラシー、先端技術、防災、国際交流など、財団の活動がわかります。さらに、月刊誌「ラジオ深夜便」のおすすめ記事が読めます。NHK財団が運営。
Top issues to fix
9 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+3 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
1.22 s
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
大河ドラマ・朝ドラをはじめ、NHK番組の最新情報をご提供します。撮影裏話や出演者の素顔がわかるインタビュー、専門家の解説、番組レビューなど独自記事を多数掲載。NHK財団の社会貢献活動もご紹介。メディアリテラシー、先端技術、防災、国際交流など、財団の活動がわかります。さらに、月刊誌「ラジオ深夜便」のおすすめ記事が読めます。NHK財団が運営。
Meta tags
- Title
- ステラnet | NHK財団が運営するネットメディア
- Description
- 大河ドラマ・朝ドラをはじめ、NHK番組の最新情報をご提供します。撮影裏話や出演者の素顔がわかるインタビュー、専門家の解説、番組レビューなど独自記事を多数掲載。NHK財団の社会貢献活動もご紹介。メディアリテラシー、先端技術、防災、国際交流など、財団の活動がわかります。さらに、月刊誌「ラジオ深夜便」のおすすめ記事が読めます。NHK財団が運営。
- Canonical
- https://www.steranet.jp
- Language
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- max-image-preview:large
- Manifest
- https://www.steranet.jp/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- CloudFront
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Amazon
- Subject
- www.steranet.jp
- Valid from
- Jun 11, 2026
- Valid to
- Dec 25, 2026
- Days until expiry
- 150
- SAN domains
- www.steranet.jp
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 33 · H3 6
Links
72 internal · 14 external · 20 broken
Images
46 total · 1 missing alt
Scripts / Styles
13 scripts · 5 stylesheets
JS / CSS size
1.5 KB · 11.7 KB
Page size
81.0 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
- Missing <html lang> attribute
Scan details
- Requested URL
- https://steranet.jp
- Final URL
- https://www.steranet.jp/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.22 s
- HTML size
- 81.0 KB
- Redirect chain
- https://steranet.jp → https://www.steranet.jp/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does steranet.jp use?
- steranet.jp is built with WordPress, jQuery, Google Analytics, Nginx.
- Is steranet.jp secure (HTTPS)?
- Yes. steranet.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 25, 2026.
- Who hosts steranet.jp?
- Hosting provider information for steranet.jp is not available yet.
- What is steranet.jp's SEO score?
- steranet.jp scored 85/100 for SEO in the latest analysis (great).
- What is steranet.jp's overall website score?
- steranet.jp has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card