Website readiness profile · Snapshot 23 October 2026

itmedia.co.jp

itmedia.co.jp's public homepage, certificate and DNS checked against 31 practices and compared with 3,856 News & Media sites.

Readiness index: 66/100
Ahead of: 40%
Practices observed: 18/31
Popularity band: Top 10K

Measured 2026-10-23 12:10:31 UTC from one location. How we measure

Readiness by lane

Green: itmedia.co.jp. Thin bar: News & Media peer median.

Enable

87/100

Peers 89

Harden

58/100

Peers 56

Accelerate

63/100

Peers 68

Recover

0/100

Peers 11

Priority fixes for itmedia.co.jp

Ordered by impact and by how common each practice is among peers.

Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 16 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
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.
44% of News & Media peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for itmedia.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.
37% of News & Media peers do this.
Guide: A Practical Website Health Check for Owners
Priority 3 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 8 external scripts without async or defer.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
42% of News & Media peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 4 · Enable
Structured data present
Observed: The homepage had no JSON-LD structured data.
What to do: Add JSON-LD for your organization and main content types, then test it with Google's Rich Results Test.
76% of News & Media peers do this.
Guide: Structured Data Basics for Website Owners

What itmedia.co.jp already does well

Practices fewer than half of News & Media peers use.

Referrer-Policy setReferrer-Policy present.22% of peers
HSTS kept for at least a yearHSTS with a 365-day max-age.35% of peers
Framing restrictedFraming controls present.42% of peers

What we saw

Homepage checked: https://www.itmedia.co.jp/
Homepage response: HTTP 200
TLS: TLSv1.3, HTTP/2
Certificate: Amazon, 197-day validity, expiring 2027-05-03
CDN or edge: Amazon CloudFront
DNS operators: Amazon Route 53
HSTS: max-age 365 days
DMARC policy: p=none
Homepage HTML: 98 KB, gzip
Images on homepage: 16 (jpg 7, png 1, gif 1)

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.

Amazon CloudFront (cdn and edge platform)Amazon Route 53 (dns operator)Amazon (certificate authority)Service guide: AWS (Amazon Web Services)

All 31 checks

Select a gap for the method and fix. How each check works

Not observed 13

Observed 18

HTTP requests move to HTTPS
HSTS kept for at least a year
TLS 1.3 negotiated
Certificate has more than 14 days left
Framing restricted
Referrer-Policy set
HTTP/2 negotiated
HTML compressed
Static files cached for 30 days or more
Offscreen images lazy-loaded
robots.txt published
XML sitemap discoverable
Canonical URL declared
Meta description written
Mobile viewport configured
Social preview image set
Page language declared
At most one redirect to the homepage

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Live status for this site: Status Is Down: itmedia.co.jp. This profile covers configuration only.

Compare with other News & Media sites

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