What powers bitter.jp?
Last seen Sep 2026 · 88 technologies across 29 categories
Advertising
Advertising Networks
Affiliate programs
Analytics
Authentication
CDN
CMS
Databases
Editors
Font scripts
JavaScript graphics
JavaScript libraries
Maps
Miscellaneous
Operating Systems
Page builders
Performance
Programming languages
Security
Static site generator
Tag managers
UI frameworks
Video players
Web Frameworks
Web Server Extensions
Web servers
Widgets
WordPress plugins
WordPress themes
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 100% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.17 / 10 · ranked #99,192 of all domains
207 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 300 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 0.0 MB · 2 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
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pratham.org 4 shared
plathome.co.jp 4 shared
abeshokai.jp 3 shared- cultura.ro 3 shared
- wp-x.jp 5 shared
netblocks.org 3 shared
Closest technology stacks among the highest-authority sites we track; "shared" counts the distinctive technologies in common.
Organisation
- m4a
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on GMO Internet (150.95.250.159)
- DNS: Lolipop
- Email: mail.bitter.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 2,239,954, 251 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| m4a.bitter.jp | 23 |
| mix-shirokuma.bitter.jp | 21 |
| shinpan.bitter.jp | 21 |
| vnat.bitter.jp | 21 |
| ouma-house.bitter.jp | 19 |
| tmwo.bitter.jp | 17 |
| pioneer-edh.bitter.jp | 16 |
| kashiwaneko.bitter.jp | 15 |
| allergy.bitter.jp | 14 |
| kansou.bitter.jp | 14 |
| www.bitter.jp | 14 |
| aged-usa-6897.bitter.jp | 13 |
| yamashina-sweets.bitter.jp | 13 |
| ungouter.bitter.jp | 12 |
| yushu.bitter.jp | 12 |
| amamik.bitter.jp | 11 |
| alocer.bitter.jp | 10 |
| chalon.bitter.jp | 10 |
| cookiehouse.bitter.jp | 10 |
| yae.bitter.jp | 10 |
| std-smile.bitter.jp | 9 |
| cafetheo.bitter.jp | 8 |
| bluewood.bitter.jp | 7 |
| whitewing.bitter.jp | 7 |
Full technology history →
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Recent changes
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Bot Management Nov 2025