Website readiness profile · Snapshot 23 October 2026
ntv.co.jp
ntv.co.jp's public homepage, certificate and DNS checked against 31 practices and compared with 536 Entertainment & Video Streaming sites.
- Readiness index
- 64/100
- Ahead of
- 56%
- Practices observed
- 19/31
- Popularity band
- Top 50K
Entertainment & Video Streaming median 62
of measured Entertainment & Video Streaming sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: ntv.co.jp. Thin bar: Entertainment & Video Streaming peer median.
Enable
82/100
Peers 80
Harden
62/100
Peers 52
Accelerate
48/100
Peers 60
Recover
100/100
Peers 12
Priority fixes for ntv.co.jp
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for no max-age, short of the 30-day benchmark.
Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
46% of Entertainment & Video Streaming peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Accelerate
Modern image formats in use
Observed: The homepage had 11 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Next.js: The next/image component serves optimized formats automatically.
32% of Entertainment & Video Streaming peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 3 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for ntv.co.jp was p=none, which asks receivers to take no action on failing mail.
What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.
31% of Entertainment & Video Streaming peers do this.
Priority 4 · Enable
Canonical URL declared
Observed: The homepage did not declare a canonical URL.
What to do: Add a self-referencing canonical link to every indexable page, using the final https:// URL.
69% of Entertainment & Video Streaming peers do this.
What ntv.co.jp already does well
Practices fewer than half of Entertainment & Video Streaming peers use.
- DNSSEC signedDNSSEC delegation (DS record) present.5.6% of peers
- Nameservers spread across providersNameservers spread across more than one operator.12% of peers
- Referrer-Policy setReferrer-Policy present.21% of peers
What we saw
- Homepage checked
- https://www.ntv.co.jp/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Cybertrust Japan Co., Ltd., 391-day validity, expiring 2026-11-09
- CDN or edge
- Amazon CloudFront
- Platform or framework
- Next.js
- DNS operators
- 3 self-run or other nameserver domains
- HSTS
- max-age 365 days, includeSubDomains, preload
- DMARC policy
- p=none
- Homepage HTML
- 59 KB, gzip
- Images on homepage
- 11 (svg 10, gif 2)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 12
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- security.txt published
- DMARC policy enforces quarantine or reject
- Framing restricted
- Content Security Policy present
- HTTP/3 advertised
- Static files cached for 30 days or more
- Modern image formats in use
- No render-blocking scripts in <head>
- Canonical URL declared
- Structured data present
Observed 19
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DNSSEC signed
- X-Content-Type-Options: nosniff
- Referrer-Policy set
- HTTP/2 negotiated
- HTML compressed
- Offscreen images lazy-loaded
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Meta description written
- Mobile viewport configured
- Social preview image set
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Own ntv.co.jp?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: ntv.co.jp. This profile covers configuration only.