shuminoengei.jp

Readiness by lane

Green: shuminoengei.jp. Thin bar: Forums & Communities peer median.

Priority fixes for shuminoengei.jp

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

1. Priority 1 · Accelerate

   HTML compressed

   Observed: The homepage HTML (128 KB) was delivered without gzip, Brotli or zstd compression.

   Why it matters: Compression usually shrinks HTML several times over, so the first bytes of the page arrive sooner on slow connections.

   What to do: Enable Brotli or gzip for text responses (HTML, CSS, JavaScript, JSON, SVG) at the CDN or origin.

   On Amazon CloudFront: Enable Compress objects automatically on the cache behaviour.

   96% of Forums & Communities peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: How to Set a Website Performance Budget That Teams Can Keep

2. Priority 2 · Enable

   Mobile viewport configured

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

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

   87% of Forums & Communities peers do this.

   Guide: Responsive Web Design Checklist for Real Devices

3. Priority 3 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for 600 seconds, short of the 30-day benchmark.

   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 Forums & Communities peers do this.

   Guide: Browser Caching Guide for Website Owners

4. Priority 4 · Accelerate

   Modern image formats in use

   Observed: The homepage had 155 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.

   30% of Forums & Communities peers do this.

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

What shuminoengei.jp already does well

Practices fewer than half of Forums & Communities peers use.

• HSTS kept for at least a yearHSTS with a 365-day max-age.28% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.31% of peers
• X-Content-Type-Options: nosniffnosniff header present.47% of peers

What we saw

Homepage checked

https://www.shuminoengei.jp/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Cybertrust Japan Co., Ltd., 198-day validity, expiring 2026-11-25

CDN or edge

Amazon CloudFront

DNS operators

Amazon Route 53

HSTS

max-age 365 days, preload

DMARC policy

p=reject

Homepage HTML

128 KB, uncompressed

Images on homepage

155 (jpg 108, png 28, gif 19)

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 Forums & Communities sites

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