athome.co.jp

Readiness by lane

Green: athome.co.jp. Thin bar: Real Estate & Property Listings peer median.

Priority fixes for athome.co.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.

   94% of Real Estate & Property Listings 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

   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.

   On Amazon CloudFront: Attach a response headers policy with Strict-Transport-Security to each distribution.

   43% of Real Estate & Property Listings peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Enable

   XML sitemap discoverable

   Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.

   What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.

   74% of Real Estate & Property Listings peers do this.

   Guide: XML Sitemap Guide: Include Only URLs You Stand Behind

4. Priority 4 · Accelerate

   Modern image formats in use

   Observed: The homepage had 104 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.

   50% of Real Estate & Property Listings peers do this.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

What athome.co.jp already does well

Practices fewer than half of Real Estate & Property Listings peers use.

• Nameservers spread across providersNameservers spread across more than one operator.7.5% of peers
• DNSSEC signedDNSSEC delegation (DS record) present.11% of peers

What we saw

Homepage checked

https://www.athome.co.jp/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Cybertrust Japan Co., Ltd., 193-day validity, expiring 2026-11-30

CDN or edge

Amazon CloudFront

DNS operators

3 self-run or other nameserver domains

DMARC policy

p=quarantine

Homepage HTML

110 KB, gzip

Images on homepage

104 (svg 40, png 39, jpg 17, gif 8)

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 Real Estate & Property Listings sites

• al-in.fr51
• bellesdemeures.com51
• boplats.se51
• findauction.in52
• homeswapper.co.uk53

Real Estate & Property Listings readiness benchmark