Cotoyogi
Web crawler for content and data aggregation
About this crawler
Cotoyogi is a web crawler identified by the regular-expression pattern Cotoyogi in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Cotoyogi traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
1.1%
Technical details
- Name
- Cotoyogi
- Pattern
Cotoyogi- Tags
- seo
- Reference
- https://ds.rois.ac.jp/center8/crawler/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; Cotoyogi/4.0; +https://ds.rois.ac.jp/center8/crawler/)
Block this crawler
robots.txt — disallow Cotoyogi:
User-agent: Cotoyogi
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Cotoyogi [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Cotoyogi") {
return 403;
}
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