What powers 
sfwj.jp?
Last seen Oct 2026 · 26 technologies across 18 categories
Advertising
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Page builders
Performance
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Security
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Web servers
Webmail
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AI Crawlers
Blocks 1 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- GPTBot Blocked
The other 32 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
1 of 33 AI crawlers blocked
Audience
- 51% desktop
- 49% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.79 / 10 · ranked #722,063 of all domains
50 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 5.7 MB · 133 requests
- WordPress theme: lightning-pro · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Science Fiction and Fantasy Writers of Japan
- Founded: 1963
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on Xserver (162.43.120.11)
- DNS: xdomain.ne.jp
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 666,785, 3 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
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Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- detected Twitter Emoji (Twemoji) Mar 2026