kikkoman.co.jp

Readiness by lane

Green: kikkoman.co.jp. Thin bar: Food & Grocery Delivery peer median.

Priority fixes for kikkoman.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 16 hours, 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.

   59% of Food & Grocery Delivery 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 · Accelerate

   Modern image formats in use

   Observed: The homepage had 47 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.

   40% of Food & Grocery Delivery peers do this.

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

3. Priority 3 · Harden

   Content Security Policy present

   Observed: The homepage response did not include a Content-Security-Policy header.

   What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

   37% of Food & Grocery Delivery peers do this.

   Guide: Payment Security and PCI DSS: What Website Owners Need to Know

4. Priority 4 · Accelerate

   HTTP/3 advertised

   Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.

   What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.

   35% of Food & Grocery Delivery peers do this.

   Guide: CDN Guide for Website Owners

What kikkoman.co.jp already does well

Practices fewer than half of Food & Grocery Delivery peers use.

• HSTS kept for at least a yearHSTS with a 365-day max-age.42% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.42% of peers
• No render-blocking scripts in <head>Head scripts load without blocking.43% of peers

What we saw

Homepage checked

https://www.kikkoman.co.jp/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

DigiCert, 339-day validity, expiring 2026-12-18

DNS operators

Akamai Edge DNS

HSTS

max-age 365 days

DMARC policy

p=reject

Homepage HTML

50 KB, br

Images on homepage

47 (svg 25, jpg 21, png 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 Food & Grocery Delivery sites

• hyperpure.com73
• jerseymikes.com73
• joyfull.co.jp73
• leukerecepten.nl73
• scooterscoffee.com73

Food & Grocery Delivery readiness benchmark