About this bot
Yahoo Japan SEO Crawler is a crawler associated with Yahoo! JAPAN and used for search and research content collection.
Primary directory identity signal: Y!J-BRW. Representative HTTP identity: Y!J-BRW/1.0 family.
Directory status: Active. Identity classification: Verified with High confidence. Identity type: official documented.
robots.txt behavior is currently unconfirmed. Do not assume robots.txt alone will control this traffic.
Risk classification: Safe. Recommended handling is to evaluate the request context before allowing, rate-limiting, or blocking.
How to identify this bot
- User-agent and crawler identifiers
-
Y!J-BRWY!J-BRW/1.0 family - Also known as
- YJ-BRW; J-BRW; Yahoo Japan SEO Crawler YJ-BRW; J-BRW
Details
- Kind
- Crawler
- Family
- Yahoo! JAPAN
- Purpose
- Search and research content collection
- Common Use
- Collecting public webpages for Yahoo! JAPAN search services, research, service quality, and development.
- Respects robots.txt
- Unknown
Verification
- Identity Type
- Officially documented
- Evidence Method
- Match the Y!J-BRW crawler token while allowing for version/format changes documented by Yahoo! JAPAN; corroborate with Yahoo! JAPAN source context where needed.
- Detection Notes
- This is a Yahoo! JAPAN crawler identity used in search/research/development workflows; it should not be reduced to a generic SEO crawler.
Website controls
- Robots.txt Snippet
User-agent: Y!J-BRW Disallow: /- Apache Rule
SetEnvIfNoCase User-Agent "Y!J-BRW" botcrawl_match=1- Nginx Rule
if ($http_user_agent ~* "Y!J\-BRW") { set $botcrawl_match 1; }