What powers jsum.or.jp?
Last seen Jun 2026 · 15 technologies across 11 categories
Analytics
Google Analytics
since May 2024
CDN
CMS
WordPress
since May 2025
Databases
MySQL
since May 2025
Font scripts
Google Font API
since May 2024
Hosting
Sakura Internet
since Aug 2022
JavaScript libraries
Miscellaneous
Open Graph
since May 2025
Operating systems
Ubuntu
since Aug 2018
Programming languages
PHP
since May 2025
Web servers
Nginx
since May 2024
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| jsum | #3 | 4 |
| jsam | #41 | 4 |
| vena contracta | #73 | 2 |
| eroa | #47 | 2 |
| fetal biometry bpd | #97 | 2 |
| fetal biometry | #98 | 2 |
| ellipse circumference | #98 | 1 |
| bpd ultrasound | #92 | 0 |
| bpd on ultrasound | #92 | 0 |
| carotid artery stenosis chart | #96 | 0 |
| carotid artery anatomy ultrasound | #38 | 0 |
| commissure mitral valve | #66 | 0 |
| wfumb 2025 | #72 | 0 |
| rar ultrasound | #66 | 0 |
| mr vena contracta | #50 | 0 |
| p2 a3 | #73 | 0 |
| pisa tee | #48 | 0 |
| pisa eroa | #57 | 0 |
| jsum | #85 | 0 |
| jsum | #83 | 0 |
| jsum | #81 | 0 |
| jsum | #79 | 0 |
| jsum | #59 | 0 |
| jsum | #39 | 0 |
| jsum | #17 | 0 |
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
- 54% phone
- 44% desktop
- 2% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
5.31 / 10 · ranked #195,933 of all domains
106 referring domains · OpenPageRank
Search traffic
17 est. monthly organic visits (US)
26 keywords in Google's top 30
Core Web Vitals
| LCP | 0.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 3.8 MB · 46 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.jsum.or.jp | 13 |
| pr.jsum.or.jp | 5 |
| jsum.or.jp | 4 |