princehotels.co.jp

Readiness by lane

Green: princehotels.co.jp. Thin bar: Hotels peer median.

Priority fixes for princehotels.co.jp

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

1. Priority 1 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for 1800 seconds, 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.

   51% of Hotels peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: Browser Caching Guide for Website Owners

2. Priority 2 · 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.

   36% of Hotels peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Harden

   DMARC policy enforces quarantine or reject

   Observed: The DMARC policy for princehotels.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.

   41% of Hotels peers do this.

   Guide: A Practical Website Health Check for Owners

4. 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.

   84% of Hotels peers do this.

   Guide: Canonical Tags: A Decision Guide for Duplicate URLs

What princehotels.co.jp already does well

Practices fewer than half of Hotels peers use.

• DNSSEC signedDNSSEC delegation (DS record) present.8.5% of peers
• Nameservers spread across providersNameservers spread across more than one operator.14% of peers

What we saw

Homepage checked

https://www.princehotels.co.jp/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

GlobalSign, 199-day validity, expiring 2027-04-02

CDN or edge

Imperva

DNS operators

3 self-run or other nameserver domains

DMARC policy

p=none

Homepage HTML

104 KB, gzip

Images on homepage

108 (jpg 79, png 29)

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 Hotels sites

• couples.jp47
• jalan.net46
• ostrovok.ru55
• pierreetvacances.com54
• yukoyuko.net51

Hotels readiness benchmark