Does Cotoyogi respect robots.txt?

Yes. The operator documents that Cotoyogi reads robots.txt and follows Disallow rules for its own token. Rules take effect on the next fetch of the file, which can be hours or days after you publish them.

How do I block Cotoyogi?

Add the Cotoyogi token to robots.txt with Disallow: /. If the crawler ignores robots.txt, match the user agent at your CDN or reverse proxy and return 403 there instead.

IPScanner

Training crawlers

Cotoyogi

Q: How do I verify a request really came from Cotoyogi?

You cannot, at least not from the request itself. No IP range file and no reverse-DNS convention have been published for this agent. The user-agent string is the only signal, and any client can send it, so treat a match as a claim rather than proof. Compare the source IP against hosting and datacenter ranges instead, and rate limit anything that behaves like a crawler.

Cotoyogi is a bot operated by ROIS that collects pages used to train AI models. Scrapes data for AI training in Japanese language. It is documented as honouring robots.txt, but no IP range list or reverse-DNS convention is published, so a request carrying this user agent cannot be proven genuine.

Cotoyogi at a glance

Reference data for the Cotoyogi crawler
User agent	`Cotoyogi` Token only. The operator has not published a full user-agent string, so match on the substring rather than an exact header.
Operator	ROIS
Purpose	AI LLM Scraper.
Respects robots.txt	Yes, documented
Verification method	None published, user agent only No IP range file and no reverse-DNS convention have been published for this agent. The user-agent string is the only signal, and any client can send it, so treat a match as a claim rather than proof.
Crawl pattern	Not published
Robots.txt tokens	`Cotoyogi`
Operator documentation	None published

Scrapes data for AI training in Japanese language.

robots.txt

Allow or block Cotoyogi

Paste one of these into the robots.txt file at the root of your domain. Rules are per token, so a block on one crawler leaves every other bot untouched.

Block Cotoyogi

User-agent: Cotoyogi
Disallow: /

Blocks every path for this crawler only.

Allow Cotoyogi

User-agent: Cotoyogi
Allow: /

Explicit allow. Useful when a wildcard rule above it would otherwise catch this crawler.

Allow, except the pages you never want quoted

User-agent: Cotoyogi
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /search

Edit the Disallow paths to match your own account, checkout and search URLs.

What blocking actually costs you

Blocking Cotoyogi keeps your pages out of the next training run. It does not remove anything already collected, and it has no effect on how the site ranks in ordinary search.

Block every crawler in the directory at once

Verification

Is that really Cotoyogi?

A user-agent header is a string the client chooses. Scrapers copy Cotoyogi precisely because site owners allow it. No IP range file and no reverse-DNS convention have been published for this agent. The user-agent string is the only signal, and any client can send it, so treat a match as a claim rather than proof.

Paste the IP address from your access log below. You will see whether it belongs to a hosting provider, a residential proxy pool or a Tor exit, plus the ASN that announces it, which is what tells you whether the claim holds up.

Datacenter IP detectionNearly every real AI crawler egresses from cloud ranges. A residential IP claiming to be one is the first thing to check.IP reputation checkSee whether the address behind a fake crawler hit has a history of abuse elsewhere.Residential proxy detectionScrapers that get blocked by user agent often come back through residential proxy pools.

Related crawlers

anthropic-aiAnthropic · Training crawlers Applebot-ExtendedApple · Training crawlers ClaudeBotAnthropic · Training crawlers FacebookBotMeta/Facebook · Training crawlers Google-ExtendedGoogle · Training crawlers

Agentscan

Identify crawlers automatically instead of by hand

Agentscan checks a request against published crawler ranges, reverse DNS and hosting data, then returns a verdict your edge can act on. One call per request, no range files to keep up to date.

How Agentscan works API reference Pricing What is my IP

FAQ