nii.ac.jp

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nii.ac.jp is ranked #7,338 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), down 22 places in four weeks. Its homepage uses Alpine.js, jQuery and Google Tag Manager. It is served through jsDelivr by Apache.

Global rank

#7,338

▲ 89 this week

Domain age

—

Registration date unavailable

Technologies

detected on the homepage

SEO score

91/100

homepage checks

Popularity rank

#7,338 of the top 1 million sites in the Tranco research ranking, which averages several traffic and DNS sources over 30 days. Best rank in the period shown: #7,019.

Weekly Tranco rank (lower is more popular).

See where nii.ac.jp sits in the top 10,000

Domain registration

The registry for .ac.jp does not publish registration data over RDAP.

Technology stack

JavaScript frameworks

JavaScript libraries

Analytics

CDN

Web servers

Detected from the homepage HTML and response headers on Oct 14, 2026. Tools loaded only after scripts run (or after consent banners) may be missing.

Homepage SEO check

Checked from the HTML our scanner received on Oct 14, 2026. Content added later by JavaScript isn't counted.

91/100

https://www.nii.ac.jp/

国立情報学研究所 / National Institute of Informatics

国立情報学研究所は、情報学という新しい研究分野での「未来価値創成」を目指すわが国唯一の学術総合研究所として、ネットワーク、ソフトウェア、コンテンツなどの情報関連分野の新しい理論・方法論から応用展開までの研究開発を総合的に推進しています。

20 passed · 2 warnings · 1 failed

Content

✓Title44 characters
✓Meta description118 characters
✓H1 headingExactly one H1
✓Subheadings1 H2 headings
✕Image alt text21 of 25 images have no alt text
✓Content lengthAbout 2,936 words

Indexing

✓IndexableNo noindex directive
✓Canonical URLhttps://www.nii.ac.jp/
✓robots.txtFound
✓XML sitemapFound
✓Language attributeja
!Structured dataNo JSON-LD or microdata

Social sharing

✓Open GraphTitle, description and image set
✓Twitter / X cardsummary_large_image

Technical

✓HTTPSServed over HTTPS
✓Mobile viewportFound
✓FaviconFound
✓Character encodingUTF-8

Security headers

✓Strict-Transport-SecuritySet
✓Content-Security-PolicySet
✓Clickjacking protectionSet
✓X-Content-Type-OptionsSet
!Referrer-PolicyNot set

Server response

Final URL: https://www.nii.ac.jp/
HTTP status: 200
Server: Apache
Response time: 313 ms (first byte 158 ms, from our scanner in a US data centre)
HTML size: 50 KB
Compression: gzip

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Sites ranked near nii.ac.jp

Rank	Website	Registered	Built with
#7,333	lpsg.com	1997	Nginx, jQuery, Google Analytics
#7,334	w.org	1993	WordPress, Nginx, Google Tag Manager
#7,335	attentivemobile.com	2017	Webflow, Cloudflare, jsDelivr
#7,336	baltimoresun.com	1997	WordPress, jsDelivr, Nginx
#7,337	thalesgroup.com	2000	—
#7,339	elnacional.cat	2015	Cloudflare, Cloudflare Web Analytics, Google Tag Manager
#7,340	google.com.kw	—	—
#7,341	a47b.com	2015	—
#7,342	robertsspaceindustries.com	2012	cdnjs, Envoy, Nginx
#7,343	pxltag.com	2025	—

Questions about nii.ac.jp

How popular is nii.ac.jp?

nii.ac.jp is #7,338 worldwide in the Tranco list published Oct 13, 2026.

What is nii.ac.jp built with?

We detected Alpine.js, jQuery, Google Tag Manager, jsDelivr and Apache on its homepage.