itkaigo.jp

Readiness by lane

Green: itkaigo.jp. Thin bar: Business Tools peer median.

Priority fixes for itkaigo.jp

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

1. Priority 1 · Enable

   Mobile viewport configured

   Observed: The homepage had no viewport meta tag, so phones may render it zoomed out.

   Why it matters: Without it, phones render the page at desktop width and shrink it, which makes text tiny and hard to use.

   What to do: Add <meta name="viewport" content="width=device-width, initial-scale=1"> and check the layout on small screens.

   95% of Business Tools peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.

   Guide: Responsive Web Design Checklist for Real Devices

2. Priority 2 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   85% of Business Tools peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   45% of Business Tools peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

4. Priority 4 · Harden

   DMARC policy enforces quarantine or reject

   Observed: No DMARC record was found at _dmarc.itkaigo.jp.

   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.

   50% of Business Tools peers do this.

   Guide: A Practical Website Health Check for Owners

What itkaigo.jp already does well

Practices fewer than half of Business Tools peers use.

• No render-blocking scripts in <head>Head scripts load without blocking.46% of peers

What we saw

Homepage checked

https://www.itkaigo.jp/

Homepage response

HTTP 200

TLS

TLSv1.2, HTTP/2

Certificate

Amazon, 197-day validity, expiring 2027-05-02

DNS operators

Amazon Route 53

Homepage HTML

3 KB, gzip

Images on homepage

4 (png 3, jpg 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.

All 31 checks

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

Compare with other Business Tools sites

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