Yahoo Japan SEO Crawler

Review

Yahoo Japan SEO Crawler is a search crawler from Yahoo used for search indexing, URL discovery, page rendering, result freshness.

User-Agent

J-BRW

User-agent strings are identity signals, not proof of identity. Use Edge to compare the user-agent with IP, datacenter, behavior, path, and request history.

Verification and Detection

Verification method: Verify Yahoo Japan SEO Crawler by matching `J-BRW` to Yahoo evidence, then checking reverse DNS, source-network ownership, signed request data, or published crawler documentation when available.

Yahoo Japan SEO Crawler traffic is primarily detected by the `J-BRW` user-agent pattern; related patterns include `J-BRW/`; a representative HTTP user-agent is `Y!J-BRW/1.0 (https://support.yahoo-net.jp/PccSearch/s/article/H000007955)`. Compare source IPs, reverse DNS, request paths, and crawl cadence with Yahoo infrastructure before trusting the traffic.

Handling Guidance

Use this public record as identity context, then verify source, behavior, and site impact inside Edge before creating rules.

Yahoo Japan SEO Crawler is used for search indexing, URL discovery, page rendering, result freshness, and search-quality checks.

Record Details

Aliases: J BRW/
Type: search
Operator: Yahoo
Family: Yahoo
Kind: Crawler
Purpose: Indexing
Identity: Verified Bot
Detection confidence: Medium
Spoofing risk: Yahoo Japan SEO Crawler Has Medium Spoofing Risk Because User Agent Strings Can Be Copied; Pair The Match With DNS, IP, Behavior, Or Operator Evidence.
Status: Active
Respects robots.txt: No
Last verified: 2026 06 23

Robots.txt Snippet

User-agent: J-BRW
Disallow: /

Traffic Matching

Live IP verification, reverse DNS, ASN and datacenter correlation, request history, connected-domain matches, behavioral context, and rule creation are kept inside Botcrawl Edge.

Open full record in Edge