What is Cotoyogi?
Cotoyogi is a research crawler operated by Japan's Research Organization of Information and Systems that collects web content to build AI training datasets for research purposes. Agent Analytics can track when it visits your website.
Category
Expected Behavior
Cotoyogi crawls websites to build AI training datasets, and its operator decides which sites, how often, and how deep it goes. Expect broad sweeps that fetch far more pages per visit than a search crawler would, on an unpredictable schedule. Volume can run heavy while a collection pass is underway, then stop entirely.
Overview
| Operated By | Research Organization of Information and Systems |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 7, 2026 |
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
As of July 7, 2026, 4% of top websites block Cotoyogi in their robots.txt files.
Overall AI Data Scraper Traffic
As of July 7, 2026, 2.4% of all web traffic came from AI data scrapers.
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.
Cotoyogi's User Agent
| User Agent | Cotoyogi |
Access other known user agents and IP addresses using the Enterprise API.
How To Block Cotoyogi
Add this rule to your robots.txt file to block Cotoyogi from accessing your entire website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Cotoyogi # https://knownagents.com/agents/cotoyogi
Disallow: /Frequently Asked Questions
Should I Block Cotoyogi?
Block it if you want control over how your work trains AI models. Cotoyogi downloads your content into training datasets without attribution, compensation, or any promise of traffic back. The case for allowing it is reach, because models trained on your content can surface your brand in AI answers. Neither choice changes your Google rankings. For comparison, 4% of the top websites we track already have robots.txt rules for Cotoyogi.
Does Cotoyogi Respect Robots.txt?
Yes. Cotoyogi is expected to honor 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 Cotoyogi actually honors it.
Does Cotoyogi Access Private Content?
Cotoyogi targets public content, but the boundary is not always respected. Some training data scrapers go after paywalled or gated pages when the operator wants that data. If a page loads without signing in, assume it can be collected.
Why Is Cotoyogi Visiting My Website?
Your content matched what Research Organization of Information and Systems wants in a training dataset. Cotoyogi discovers pages mechanically, through links from other sites, sitemaps, and seed lists, not because anyone chose your site personally.
How Can I Tell if Cotoyogi Is Visiting My Website?
Agent Analytics tracks Cotoyogi 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 "Cotoyogi". Look for broad sweeps that fetch large numbers of pages in sequence. Keep in mind that Cotoyogi 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.