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dh-jac.net

International Joint Digital Archiving Center for Japanese Art and Culture (ARC-iJAC) | ART RESEARCH CENTER, RITSUMEIKAN UNIVERSITY

Last scanned Aug 24, 2026, 1:23 PM

82

Overall score

Great

Summary

アート・リサーチセンターは、私たち人類が持つ文化を後世に伝達するために、芸術、芸能、技術、技能を中心とした有形・無形の人間文化の所産を、歴史的、社�… This website uses Apache hosted on OPTAGE - OPTAGE Inc., JP. SEO is fair (60/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

アート・リサーチセンターは、私たち人類が持つ文化を後世に伝達するために、芸術、芸能、技術、技能を中心とした有形・無形の人間文化の所産を、歴史的、社会的観点から研究・分析し、記録・整理・保存・発信することを目的とした研究所です。

Japan
Hosted on OPTAGE - OPTAGE Inc., JP

Top issues to fix

11 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 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.

  • Title longer than 60 characters

    SEO

    Shorten the title to under 60 characters so search results don't truncate it.

  • Meta description longer than 160 characters

    SEO

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

  • 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.

60

SEO

7 issue(s) found

100

Performance

266 ms

75

Security

HTTPS & header checks

100

Accessibility

0 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.

アート・リサーチセンターは、私たち人類が持つ文化を後世に伝達するために、芸術、芸能、技術、技能を中心とした有形・無形の人間文化の所産を、歴史的、社会的観点から研究・分析し、記録・整理・保存・発信することを目的とした研究所です。

YouTubeInstagramX (Twitter)

Meta tags

Title
International Joint Digital Archiving Center for Japanese Art and Culture (ARC-iJAC) | ART RESEARCH CENTER, RITSUMEIKAN UNIVERSITY
Description
アート・リサーチセンターは、私たち人類が持つ文化を後世に伝達するために、芸術、芸能、技術、技能を中心とした有形・無形の人間文化の所産を、歴史的、社会的観点から研究・分析し、記録・整理・保存・発信することを目的とした研究所です。
Canonical
Language
en
Charset
Viewport
width=device-width
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

jQueryGoogle AnalyticsApache

Hosting & CDN

Hosting provider
OPTAGE - OPTAGE Inc., JP
CDN provider
—
IP address
219.75.130.178
ASN
AS17511 (OPTAGE - OPTAGE Inc., JP)

DNS records

TypeValue
A
  • 219.75.130.178
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
dh-jac.net
Valid from
Jul 29, 2026
Valid to
Oct 27, 2026
Days until expiry
62
SAN domains
dh-jac.net, www.dh-jac.net

Security headers

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

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 2 · H2 5 · H3 7

Links

95 internal · 23 external · 15 broken

Images

22 total · 1 missing alt

Scripts / Styles

11 scripts · 5 stylesheets

JS / CSS size

606 KB · 65.1 KB

Page size

625 B

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
15
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters
  • Missing canonical link
  • Multiple H1 headings found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://dh-jac.net
Final URL
https://www.dh-jac.net/
HTTP status
200
HTTP version
HTTP/2
Response time
266 ms
HTML size
625 B
Redirect chain
https://dh-jac.net → https://www.dh-jac.net/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does dh-jac.net use?
dh-jac.net is built with jQuery, Google Analytics, Apache.
Is dh-jac.net secure (HTTPS)?
Yes. dh-jac.net uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 27, 2026.
Who hosts dh-jac.net?
dh-jac.net is hosted on OPTAGE - OPTAGE Inc., JP.
What is dh-jac.net's SEO score?
dh-jac.net scored 60/100 for SEO in the latest analysis (fair).
What is dh-jac.net's overall website score?
dh-jac.net has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.