What powers ndl.go.jp?
Last seen Jun 2026 · 49 technologies across 24 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| tojo | #5 | 690 |
| national diet library | #1 | 490 |
| diet library | #1 | 490 |
| potsdam declaration | #2 | 470 |
| kyoto-shi | #24 | 420 |
| koto musical instrument | #5 | 310 |
| deshima | #2 | 310 |
| shibuya-ku | #80 | 280 |
| ryoma sakamoto | #6 | 270 |
| kiyomizu temple | #17 | 260 |
| zaibatsu | #5 | 250 |
| shinjuku-ku | #32 | 190 |
| mori ougai | #3 | 190 |
| akiko yosano | #6 | 180 |
| tokyo 1940 | #3 | 160 |
| national diet | #3 | 160 |
| sakamoto ryma | #7 | 160 |
| february 26 incident | #2 | 140 |
| yosano akiko | #8 | 110 |
| yoshinobu tokugawa | #6 | 98 |
| girth to diameter | #17 | 95 |
| mukden incident | #7 | 92 |
| pi and circles | #8 | 87 |
| tojo ww2 | #3 | 86 |
| japanese constitution | #4 | 86 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 66% desktop
- 32% phone
- 2% tablet
Japan
South Korea
Taiwan
Hong Kong SAR China
United States
Germany
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
8.65 / 10 · ranked #1,349 of all domains
5,342 referring domains · OpenPageRank
Search traffic
11,900 est. monthly organic visits (US)
3,100 keywords in Google's top 30
Core Web Vitals
| LCP | 1.3 s |
| INP | 75 ms |
| CLS | 0.85 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese (Japan)
- CDN: Amazon CloudFront
- Weight: 3.1 MB · 116 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| current.ndl.go.jp | 21 |
| kn.ndl.go.jp | 10 |
| kn2.ndl.go.jp | 10 |
| mina.ndl.go.jp | 9 |
| ndlsearch.ndl.go.jp | 9 |
| openinq.dl.ndl.go.jp | 9 |
| www.dl.ndl.go.jp | 9 |
| www.ndl.go.jp | 9 |
| rnavi.ndl.go.jp | 8 |
| dl.ndl.go.jp | 7 |
| hourei.ndl.go.jp | 7 |
| kidsopac.ndl.go.jp | 7 |
| kokkai.ndl.go.jp | 7 |
| rekion.dl.ndl.go.jp | 7 |
| teikokugikai-i.ndl.go.jp | 7 |
| crd.ndl.go.jp | 6 |
| dajokan.ndl.go.jp | 6 |
| enquete.ndl.go.jp | 6 |
| lab.ndl.go.jp | 6 |
| warp.ndl.go.jp | 6 |
| ndl.go.jp | 5 |
| warp.da.ndl.go.jp | 5 |
| ndlonline.ndl.go.jp | 4 |
| iss.ndl.go.jp | 3 |
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Recent changes
- detected Leaflet Mar 2026
- detected Livefyre Mar 2026
- detected Alpine.js Jan 2026
- detected Htmx Jan 2026
- detected Tailwind CSS Jan 2026
- detected Priority Hints Nov 2025