What is Y!J-DLC?
Y!J-DLC is an uncategorized agent. You can set up Agent Analytics to see when Y!J-DLC visits your website.
Category
| Example User Agent | Y!J-DLC/1.0 (https://support.yahoo-net.jp/PccSearch/s/article/H000007955) |
| Source | Official Website |
| Triggered By | Unknown |
| Used for AI Model Training | Unknown |
| Affects AI Chat & Search Visibility | Unknown |
| Expected To Follow Robots.txt | Yes |
Why Is Y!J-DLC Visiting My Website?
Y!J-DLC's purpose has not yet been identified. Until it is categorized or its operator explains it, its behavior on your site is the best evidence of its intent.
Should I Block Y!J-DLC?
Monitor it before deciding. Y!J-DLC has not been categorized, so there is no established behavior profile to rely on. Review which pages it requests and how often, then block it if the traffic is excessive or targets content you would not share with an unidentified bot. For context, 7% of the top websites we track currently have robots.txt rules for Y!J-DLC.
How Do I Block Y!J-DLC Using Robots.txt?
Add this rule to your robots.txt file to block Y!J-DLC from accessing your 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-DLC # https://knownagents.com/agents/yj-dlc
Disallow: /Insights for Y!J-DLC
As of October 30, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
Frequently Asked Questions
What Traffic Patterns Should I Expect From Y!J-DLC?
Y!J-DLC does not yet have an established behavior profile. Look for patterns in Agent Analytics: steady, considerate crawling may indicate an unannounced index, while fast, deep sweeps suggest scraping. Its user-agent string and IP addresses may offer the best clues to who operates it.
Does Y!J-DLC Follow Robots.txt Rules?
Y!J-DLC is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether Y!J-DLC respects it.
Is Y!J-DLC Used for AI Model Training?
Unknown. Y!J-DLC's operator has not documented enough about its purpose to determine whether collected content is used for AI model training.
Does Blocking Y!J-DLC Affect AI Search or Citations?
Unknown. Y!J-DLC's role is not documented well enough to determine whether blocking it affects AI search results or citations.
Does Y!J-DLC Access Private Content?
Unknown. Y!J-DLC has no established scope, so monitor what it requests. Repeated attempts to reach login or admin paths are a reason to investigate or block it.
How Can I Verify a Request From Y!J-DLC?
Agent Analytics tracks Y!J-DLC visits in real time. You can also check your server logs for requests whose user-agent string contains "Y!J-DLC". Record the paths it requests and how often because no reliable behavior profile exists yet. Because Y!J-DLC does not publish a verification method, any client can claim its identity and a log match is only a clue.