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costco.co.jp

コストコオンライン - 公式サイト | Costco Japan

Last scanned Jul 26, 2026, 5:18 AM

81

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 hosted on BBIL-AP - BHARTI Airtel Ltd., IN. SEO is good (85/100) and accessibility is good (85/100). Security scores good (85/100) and performance fair (70/100). 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。

United States
Hosted on BBIL-AP - BHARTI Airtel Ltd., IN

Top issues to fix

8 issues found

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • 3 cookies without Secure/HttpOnly flags

    Security

    Set 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

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+2 more issues — details in the sections below.

85

SEO

3 issue(s) found

70

Performance

2.51 s

85

Security

HTTPS & header checks

85

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

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。

Contact

Email, phone, and address published on this site's own pages.

Source: https://www.costco.co.jp:443/contact

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

OpenGraph & Twitter Card

OpenGraph

og:title
コストコオンライン - 公式サイト | Costco Japan
og: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。
og:type
website
og:url
https://www.costco.co.jp/

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

AngularWordPressGoogle Analytics

Hosting & CDN

CDN provider
—
IP address
23.208.178.158
ASN
AS9498 (BBIL-AP - BHARTI Airtel Ltd., IN)

DNS records

TypeValue
A
  • 23.208.178.158
AAAA—
MX—
TXT—
NS—
CAA—
CNAME
  • www.costco.co.jp.edgekey.net
IPv6 supportNo

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
176
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 · 3 cookie(s) observed

Content & assets

Headings

H1 7 · H2 4 · H3 10

Links

784 internal · 81 external · 3 broken

Images

330 total · 151 missing alt

Scripts / Styles

25 scripts · 5 stylesheets

JS / CSS size

143 KB · 189 KB

Page size

1.7 MB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Meta description longer than 160 characters
  • Multiple H1 headings found
  • sitemap.xml not found

Accessibility issues

  • More than 20% of images are missing alt text

Careers

View careers page

This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.

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
2.47 s
HTML size
1.7 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, Google Analytics.
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?
costco.co.jp is hosted on BBIL-AP - BHARTI Airtel Ltd., IN.
What is costco.co.jp's SEO score?
costco.co.jp scored 85/100 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 81/100, combining SEO, performance, security, and accessibility.
Is costco.co.jp hiring?
costco.co.jp has a careers page; check it directly for current openings.