costco.co.jp
コストコオンライン - 公式サイト | Costco Japan
Last scanned Aug 5, 2026, 1:00 PM · 9 views
Overall score
Great
Summary
コストコ公式オンラインショップ。コストコはアメリカ発祥の会員制倉庫型店です。高品質な商品とサービスをできる限りの低価格にて提供し続けることをモット�… This website uses WordPress. SEO is good (80/100) and accessibility is good (85/100). Security scores good (85/100) and performance good (80/100). Top issue: Meta description longer than 160 characters.
コストコ公式オンラインショップ。コストコはアメリカ発祥の会員制倉庫型店です。高品質な商品とサービスをできる限りの低価格にて提供し続けることをモットーに、全国に倉庫店を展開中。公式オンラインショップでは、自宅にいながらゆっくりとコストコでのお買物が可能に。
Top issues to fix
9 issues found
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
2 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+3 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
426 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
+1 overall since Jul 26, 2026
- Overall
- 82
- SEO
- 80
- Security
- 85
- Performance
- 80
- Accessibility
- 85
Organization
Company details published in this site's own structured data.
コストコ公式オンラインショップ。コストコはアメリカ発祥の会員制倉庫型店です。高品質な商品とサービスをできる限りの低価格にて提供し続けることをモットーに、全国に倉庫店を展開中。公式オンラインショップでは、自宅にいながらゆっくりとコストコでのお買物が可能に。
Meta tags
- Title
- コストコオンライン - 公式サイト | Costco Japan
- Description
- コストコ公式オンラインショップ。コストコはアメリカ発祥の会員制倉庫型店です。高品質な商品とサービスをできる限りの低価格にて提供し続けることをモットーに、全国に倉庫店を展開中。公式オンラインショップでは、自宅にいながらゆっくりとコストコでのお買物が可能に。
- Canonical
- https://www.costco.co.jp/
- Language
- ja
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index,follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- DigiCert Inc
- Subject
- prod-sip.costco.co.uk
- Valid from
- Jul 13, 2026
- Valid to
- Jan 20, 2027
- Days until expiry
- 168
- SAN domains
- prod-sip.costco.co.uk, costcowholesalees.costco.es, costcowholesalefr.costco.fr, media-prod-sip.costco.co.kr, media-prod-sip.costco.co.uk, media-prod-sip.costco.com.mx, media-prod-sip.costco.com.tw, media.costco.co.jp, media.costco.co.kr, media.costco.co.nz, media.costco.co.uk, media.costco.com.au, media.costco.com.mx, media.costco.com.tw, media.costco.es, media.costco.fr, media.costco.is, media.costco.se, prod-sip.costco.co.jp, prod-sip.costco.co.kr, prod-sip.costco.com.au, prod-sip.costco.com.mx, prod-sip.costco.com.tw, prod-sip.costco.es, prod-sip.costco.fr, prod-sip.costco.is, signin-intl.costco.com, signinapi-intl.costco.com, www.costco.co.jp, www.costco.co.kr, www.costco.co.nz, www.costco.co.uk, www.costco.com.au, www.costco.com.mx, www.costco.com.tw, www.costco.es, www.costco.fr, www.costco.is, www.costco.se, www.costcowholesalees.costco.es, www.costcowholesalefr.costco.fr, www.occ.costco.co.jp
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 7 · H2 4 · H3 10
Links
783 internal · 81 external · 20 broken
Images
375 total · 163 missing alt
Scripts / Styles
20 scripts · 3 stylesheets
JS / CSS size
105 KB · 181 KB
Page size
1.8 MB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Multiple H1 headings found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- More than 20% of images are missing alt text
Scan details
- Requested URL
- https://costco.co.jp
- Final URL
- https://www.costco.co.jp:443/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 388 ms
- HTML size
- 1.8 MB
- Redirect chain
- https://costco.co.jp → https://www.costco.co.jp:443/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does costco.co.jp use?
- costco.co.jp is built with Angular, WordPress.
- Is costco.co.jp secure (HTTPS)?
- Yes. costco.co.jp uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Jan 20, 2027.
- Who hosts costco.co.jp?
- Hosting provider information for costco.co.jp is not available yet.
- What is costco.co.jp's SEO score?
- costco.co.jp scored 80/100 for SEO in the latest analysis (great).
- What is costco.co.jp's overall website score?
- costco.co.jp has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
- Has costco.co.jp's score changed over time?
- costco.co.jp's overall score has improved by 1 point (from 81 to 82) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card