What technology does y-history.net use?

y-history.net is built with Apache.

Is y-history.net secure (HTTPS)?

Yes. y-history.net uses TLS 1.2 with a certificate issued by Japan Registry Services Co., Ltd., valid until Nov 30, 2026.

Who hosts y-history.net?

y-history.net is hosted on TOHKNET - TOHKnet Co.,Inc., JP.

What is y-history.net's SEO score?

y-history.net scored 60/100 for SEO in the latest analysis (fair).

What is y-history.net's overall website score?

y-history.net has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.

y-history.net

世界史の窓

Last scanned Aug 24, 2026, 1:23 PM

Overall score

Fair

Summary

世界史学習のための用語集を中心としたページです。. This website uses Apache hosted on TOHKNET - TOHKnet Co.,Inc., JP. SEO is fair (60/100) and accessibility is good (80/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.

世界史学習のための用語集を中心としたページです。

Japan

Hosted on TOHKNET - TOHKnet Co.,Inc., JP

Top issues to fix

11 issues found · 3 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
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.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+5 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

139 ms

Security

HTTPS & header checks

Accessibility

2 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.

世界史学習のための用語集を中心としたページです。

Contact

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

Email: kimihira@y-history.net sekaisi@y-history.net

Meta tags

Title: 世界史の窓
Description: 世界史学習のための用語集を中心としたページです。
Canonical
Language
Charset: UTF-8
Viewport: width=device-width,initial-scale=1.0,minimum-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Apache

Hosting & CDN

Hosting provider: TOHKNET - TOHKnet Co.,Inc., JP
CDN provider: —
IP address: 219.109.139.69
ASN: AS7516 (TOHKNET - TOHKnet Co.,Inc., JP)

DNS records

Type	Value
A	219.109.139.69
AAAA	—
MX	y-history.net
TXT	v=spf1 ip4:219.109.139.0/24 ~all
NS	ns-1649.awsdns-14.co.uk ns-1289.awsdns-33.org ns-826.awsdns-39.net ns-89.awsdns-11.com
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.2
Issuer: Japan Registry Services Co., Ltd.
Subject: y-history.net
Valid from: Oct 31, 2025
Valid to: Nov 30, 2026
Days until expiry: 96
SAN domains: y-history.net, www.y-history.net

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 1

Links

5 internal · 0 external · 0 broken

Images

4 total · 0 missing alt

Scripts / Styles

1 scripts · 1 stylesheets

JS / CSS size

1.4 KB · 14.1 KB

Page size

16.0 KB

Robots.txt & Sitemap

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

SEO issues

Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://y-history.net
Final URL: https://y-history.net
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 139 ms
HTML size: 16.0 KB
Redirect chain: https://y-history.net

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