Yahoo! JAPAN Crawler

Listed only

Web crawler operated by Yahoo! JAPAN (LY Corporation) to collect pages for its Japanese search index and related services. It identifies itself with Y!J-prefixed user-agent tokens and follows the Robots Exclusion Protocol.

Operated by LY Corporation (Yahoo! JAPAN) · Official documentation

User agents

Patterns this directory matches, with real observed strings.

regexY!J-
observedY!J-ASR/0.1 crawler (http://www.yahoo-help.jp/app/answers/detail/p/595/a_id/42716/)
observedY!J-BRJ/YATS crawler (http://help.yahoo.co.jp/help/jp/search/indexing/indexing-15.html)

How to verify

No verification recipe published by the operator.

Good Bot Practices scorecard

Identifies honestly
Stable UA token documented (1 pattern)
Verifiable
Operator publishes no verification path
Respects robots.txt
Honors robots.txt
Behaves
Crawl-rate behavior is operator-declared; not machine-verifiable from this dataset
Reachable operator
Operator and documentation published

Measured against the Good Bot Practices.