What powers under.jp?
Last seen Aug 2026 · 97 technologies across 33 categories
Advertising
Amazon Advertising
since Sep 2022
Google AdSense
since Aug 2018
Google Publisher Tag
since Mar 2021
ID5
since Jul 2024
Twitter Ads
since Jul 2021
Advertising Networks
AdRoll
since Jun 2018
Affiliate programs
Moshimo
since Oct 2024
Analytics
Authentication
Facebook Login
since Jul 2021
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Litespeed Cache
since Jul 2022
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since Oct 2022
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
Google Hosted Libraries
since Feb 2022
jQuery CDN
since Feb 2022
jsDelivr
since Jun 2021
CMS
WordPress
since Aug 2018
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MySQL
since Aug 2018
Ecommerce
Cart Functionality
since Oct 2023
Welcart
since Oct 2023
Editors
Font scripts
Font Awesome
since Aug 2018
Google Font API
since May 2019
JavaScript Frameworks
JavaScript graphics
JavaScript libraries
Clipboard.js
since Jun 2021
LazySizes
since Feb 2022
LazySizes unveilhooks plugin
since Jul 2022
Lodash
since Jun 2021
Lozad.js
since Jan 2026
prettyPhoto
since Oct 2022
Slick
since Jun 2018
Swiper
since Oct 2022
Maps
Google Maps
since Sep 2020
Miscellaneous
Babel
since Jul 2021
Gravatar
since Aug 2018
Open Graph
since Sep 2022
Prism
since Nov 2018
RSS
since Dec 2022
Swiper Slider
since Mar 2020
SyntaxHighlighter
since Jul 2019
Mobile frameworks
Operating Systems
CentOS
since Jun 2018
Page builders
WordPress Block Editor
since Oct 2024
WordPress Site Editor
since Aug 2024
Performance
Priority Hints
since Aug 2023
Programming languages
Security
Cloudflare Bot Management
since Oct 2023
reCAPTCHA
since Sep 2022
Segmentation
Adobe Audience Manager
since Dec 2025
Tag managers
Google Tag Manager
since Jun 2018
UI frameworks
Bootstrap
since Apr 2019
Video players
YouTube
since Jul 2022
Web Frameworks
Material Design Lite
since Jun 2018
Web Server Extensions
Web Servers
Widgets
WordPress plugins
GoDaddy CoBlocks
since Aug 2023
Imagely NextGEN Gallery
since Oct 2022
Jetpack
since Feb 2022
Popup Maker
since Aug 2023
RankMath SEO
since Jan 2026
TablePress
since Feb 2022
WordPress themes
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
- Sep 2026 * removed from robots.txt
- Sep 2026 robots.txt removed
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.85 / 10 · ranked #53,875 of all domains
381 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 275 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 0.1 MB · 11 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Similar sites
- her.jp 6 shared
- jps.or.jp 4 shared
- punyu.jp 4 shared
- itigo.jp 7 shared
- uh-oh.jp 5 shared
- shobunsha.co.jp 3 shared
- oops.jp 7 shared
- jspe.or.jp 3 shared
Closest technology stacks among the highest-authority sites we track; "shared" counts the distinctive technologies in common.
Infrastructure
- Hosted on GMO Internet (150.95.250.159)
- DNS: Lolipop
- Email: mail.under.jp
- Email security: no SPF record, DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 425,764, 421 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| oneroomlab.under.jp | 19 |
| udl-darts.under.jp | 19 |
| umi-nagisa.under.jp | 19 |
| 305lab.under.jp | 18 |
| tambayoung.under.jp | 18 |
| hakomama0716.under.jp | 17 |
| massiveinitiativ.under.jp | 17 |
| fj1008.under.jp | 15 |
| coded.under.jp | 14 |
| daydream.under.jp | 14 |
| mono.under.jp | 14 |
| wakuwaku-math.under.jp | 14 |
| www.under.jp | 14 |
| mandara.redredsea.under.jp | 13 |
| niihamaswallows.under.jp | 13 |
| therapy.under.jp | 13 |
| dip.under.jp | 12 |
| kokoroseitaiin.under.jp | 12 |
| meshizanmai.under.jp | 12 |
| asahi-kg-2020.under.jp | 11 |
| chitoseya.under.jp | 11 |
| asakusa.under.jp | 10 |
| watchandc.under.jp | 10 |
| ckhp.under.jp | 9 |
Full technology history →
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Recent changes
- dropped Microsoft ASP.NET Aug 2026