What powers bac.ac.jp?
Last seen Jun 2026 · 16 technologies across 11 categories
Advertising
FreakOut
since Feb 2022
Yahoo Advertising
since Jul 2023
Analytics
Google Analytics
since Jan 2019
CDN
jsDelivr
since Jul 2020
Font scripts
Google Font API
since Sep 2019
JavaScript graphics
particles.js
since Sep 2019
JavaScript libraries
Maps
Google Maps
since Dec 2022
Miscellaneous
Open Graph
since Sep 2024
Tag managers
Google Tag Manager
since Jan 2019
Video players
YouTube
since Jan 2019
Web servers
Apache HTTP Server
since Jan 2019
Audience
- 68% phone
- 32% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.17 / 10 · ranked #471,239 of all domains
65 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 15.4 MB · 189 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- dropped Google Ads May 2026
- dropped Google Ads Conversion Tracking May 2026
- dropped Priority Hints May 2026
- dropped Twitter Ads May 2026
- detected Priority Hints Mar 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025