What powers call4.jp?

Last seen Jun 2026 · 20 technologies across 14 categories

Analytics

Google Analytics
since Apr 2019

Authentication

Facebook Login
since Jul 2021

CDN

cdnjs
since Nov 2021
Cloudflare
since May 2022

Email

Google Workspace
since Aug 2022

Font scripts

Google Font API
since Apr 2019

JavaScript libraries

Dojo v1
since Aug 2020
jQuery v3.3.1
since Apr 2019
Marked
since Apr 2019
Slick
since Apr 2019
Swiper
since Oct 2022

Marketing automation

MailChimp
since Feb 2021

Miscellaneous

Open Graph
since Oct 2022
Popper
since Apr 2022

Operating systems

AlmaLinux
since Nov 2024

Programming languages

PHP v8.2.21
since Apr 2019

Tag managers

Google Tag Manager
since Apr 2019

UI frameworks

Bootstrap v4.1.3
since Apr 2019

Web server extensions

OpenSSL v3.0.7
since Nov 2024

Web servers

Apache HTTP Server v2.4.57
since Apr 2019

Top search keywords

KeywordPositionEst. monthly visits
bsl4 #66 4
4 call #6 2
why doesn't japan allow dual citizenship #86 0
yoiko fujimi manga #29 0
us embassy tokyo / twitter #71 0
rjtt chart #26 0
seeking asylum in japan #29 0
pacs icd 10 #79 0
pacs icd 10 #79 0
japanese refugees #80 0
japanese civil code #81 0
japan on refugees #82 0
komagane japan #68 0
hostage justice #49 0
fujimi yoiko #28 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

  • 66% desktop
  • 34% phone
  • Japan

Countries where the site has Chrome traffic, strongest markets first.

Open Page Rank

5.32 / 10 · ranked #189,897 of all domains

117 referring domains · OpenPageRank

Search traffic

6 est. monthly organic visits (US)

15 keywords in Google's top 30

Core Web Vitals

LCP1.5 s
INP25 ms
CLS0.3
TTFB800 ms

Real user p75, Chrome UX Report, Jun 2026.

Page

  • Language: English
  • Weight: 17.7 MB · 142 requests
  • Structured data: OpenGraph, Twitter Cards

Homepage as crawled by the HTTP Archive, Jul 2026.

Full technology history →
Report an incorrect detection

Recent changes

Look up any website for free

No paywall, no lead-gen, no account. Paste a domain and see what powers it.

No account neededHistory since 2018