What technology does kantei.go.jp use?

We did not detect any specific technologies for kantei.go.jp in the latest scan.

Is kantei.go.jp secure (HTTPS)?

Yes. kantei.go.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Sep 26, 2026.

Who hosts kantei.go.jp?

Hosting provider information for kantei.go.jp is not available yet.

What is kantei.go.jp's SEO score?

kantei.go.jp scored 70/100 for SEO in the latest analysis (fair).

What is kantei.go.jp's overall website score?

kantei.go.jp has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.

Has kantei.go.jp's score changed over time?

kantei.go.jp's overall score has improved by 3 points (from 84 to 87) since Jul 22, 2026.

kantei.go.jp

首相官邸

Last scanned Jul 29, 2026, 10:00 PM · 10 views

Overall score

Great

Summary

首相官邸のホームページです。内閣や総理大臣に関する情報をご覧になれます。. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: No H1 heading found.

首相官邸のホームページです。内閣や総理大臣に関する情報をご覧になれます。

Top issues to fix

6 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

4 issue(s) found

100

Performance

486 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

+3 overall since Jul 22, 2026

Overall: 87
SEO: 70
Security: 90
Performance: 100
Accessibility: 90

Organization

Company details published in this site's own structured data.

首相官邸のホームページです。内閣や総理大臣に関する情報をご覧になれます。

Meta tags

Title: 首相官邸
Description: 首相官邸のホームページです。内閣や総理大臣に関する情報をご覧になれます。
Canonical: https://www.kantei.go.jp/
Language: ja
Charset: UTF-8
Viewport: width=device-width, viewport-fit=cover
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: CloudFront
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: Amazon
Subject: *.kantei.go.jp
Valid from: Mar 13, 2026
Valid to: Sep 26, 2026
Days until expiry: 59
SAN domains: *.kantei.go.jp

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 4 · H3 2

Links

29 internal · 0 external · 20 broken

Images

27 total · 0 missing alt

Scripts / Styles

2 scripts · 2 stylesheets

JS / CSS size

737 B · 0 B

Page size

18.7 KB

Robots.txt & Sitemap

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

SEO issues

No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://kantei.go.jp
Final URL: https://www.kantei.go.jp/
HTTP status: 200
HTTP version: HTTP/2
Response time: 486 ms
HTML size: 18.7 KB
Redirect chain: https://kantei.go.jp → https://www.kantei.go.jp/

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Frequently asked questions

What technology does kantei.go.jp use?: We did not detect any specific technologies for kantei.go.jp in the latest scan.
Is kantei.go.jp secure (HTTPS)?: Yes. kantei.go.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Sep 26, 2026.
Who hosts kantei.go.jp?: Hosting provider information for kantei.go.jp is not available yet.
What is kantei.go.jp's SEO score?: kantei.go.jp scored 70/100 for SEO in the latest analysis (fair).
What is kantei.go.jp's overall website score?: kantei.go.jp has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
Has kantei.go.jp's score changed over time?: kantei.go.jp's overall score has improved by 3 points (from 84 to 87) since Jul 22, 2026.