What is Y!J-ASR?
Y!J-ASR is an uncategorized agent. Agent Analytics can track when it visits your website.
Overview
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 15, 2026 |
Category
Expected Behavior
Y!J-ASR has no established behavior profile yet. Read its pattern in Agent Analytics: steady polite crawling suggests an unannounced index, while fast deep sweeps suggest scraping. Its user agent string and IP addresses are the best clues to who runs it.
Y!J-ASR's User Agent
| User Agent | Y!J-ASR/1.0 crawler (https://support.yahoo-net.jp/PccSearch/s/article/H000007955) |
How To Block Y!J-ASR With Robots.txt
Add this rule to your robots.txt file to block Y!J-ASR from accessing your entire website, or use Automatic Robots.txt to block all uncategorized agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Y!J-ASR # https://knownagents.com/agents/yj-asr
Disallow: /Global Insights for Y!J-ASR
As of July 15, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
0% of top websites block Y!J-ASR in their robots.txt files.
Overall Uncategorized Traffic
2.2% of all web traffic came from uncategorized agents.
Top Visited Website Categories
The types of websites most frequently visited by Y!J-ASR.
Frequently Asked Questions
Should I Block Y!J-ASR?
Watch it first. Y!J-ASR has not been categorized yet, so there is no track record to lean on. Check which pages it requests and how often, and block it if the traffic is heavy or pointed at content you would not give an unknown bot. Almost none of the top websites we track have robots.txt rules for Y!J-ASR right now.
Does Y!J-ASR Follow Robots.txt Rules?
Yes. Y!J-ASR is expected to follow robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms Y!J-ASR actually follows it.
Does Y!J-ASR Access Private Content?
Unknown. Y!J-ASR has no documented scope, so watch what it actually requests. Repeated hits on login or admin paths are the signal to block it.
Why Is Y!J-ASR Visiting My Website?
Nobody knows yet. Y!J-ASR is undocumented, so until its operator explains it, its behavior on your site is the only evidence of its intent.
How Can I Tell if Y!J-ASR Is Visiting My Website?
Agent Analytics tracks Y!J-ASR visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "Y!J-ASR". Log the paths it requests and how often, since nothing about it is documented. Keep in mind that Y!J-ASR doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.