Safe Official docs Scrapers

Cotoyogi (ROIS-DS)

Operated by ROIS-DS

Quick Facts

User-Agent:
Cotoyogi
Category:
Scrapers
Operator:
ROIS-DS
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10
Official docs:
ds.rois.ac.jp

Confirmed by the operator

ROIS-DS names Cotoyogi on its own documentation page, linked above. The token, purpose and robots.txt behaviour on this profile come from that page, re-checked on October 19, 2026.

What is Cotoyogi (ROIS-DS)?

Cotoyogi (ROIS-DS) is an AI data-collection crawler operated by ROIS-DS. It gathers public web content to build or refine training datasets for large language models. Like other AI training crawlers, Cotoyogi (ROIS-DS) does not influence your search-engine rankings, so you can block it via robots.txt without any SEO penalty if you wish to opt out of AI training.

Cotoyogi (ROIS-DS) is an AI data-collection crawler operated by ROIS-DS. It gathers public web content to build or refine training datasets for large language models. Like other AI training crawlers, Cotoyogi (ROIS-DS) does not influence your search-engine rankings, so you can block it via robots.txt without any SEO penalty if you wish to opt out of AI training.
Cotoyogi (ROIS-DS) uses the user-agent token Cotoyogi. You can control it via robots.txt, meta tags (noai), or the emerging llms.txt standard. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.

What happens if you block Cotoyogi (ROIS-DS)?

✅ No SEO Impact - Blocking Cotoyogi (ROIS-DS) does not affect your rankings in Google, Bing, or any other search engine. Cotoyogi (ROIS-DS) is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.
Generally safe to allow; provides legitimate crawling value.

How to block Cotoyogi (ROIS-DS) with robots.txt

<code>User-agent: Cotoyogi</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)
User-agent: Cotoyogi Disallow: /
Allow all (robots.txt)
User-agent: Cotoyogi Allow: /
Block private only (robots.txt)
User-agent: Cotoyogi Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block Cotoyogi (ROIS-DS) if ($http_user_agent ~* "Cotoyogi") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block Cotoyogi (ROIS-DS) SetEnvIfNoCase User-Agent "Cotoyogi" bad_bot Order Allow,Deny Allow from all Deny from env=bad_bot
Meta robots tag
<meta name="robots" content="noindex, nofollow">
X-Robots-Tag header
X-Robots-Tag: noindex, nofollow

Is Cotoyogi (ROIS-DS) safe to allow?

Yes, Cotoyogi (ROIS-DS) is a safe and legitimate crawler operated by ROIS-DS. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Verify by reverse-DNS lookup: legitimate Cotoyogi (ROIS-DS) requests resolve to ROIS-DS's domain.

What does Cotoyogi (ROIS-DS) do?

Understanding Cotoyogi (ROIS-DS)'s purpose helps you decide whether to allow or block it.

  • Collects public web content to train large language models
  • Builds and refreshes AI training datasets
  • Harvests text, code, and structured data for model improvement
  • Does NOT affect search-engine rankings
  • Can be blocked to opt out of AI training without SEO loss

Cotoyogi (ROIS-DS) in context

Cotoyogi (ROIS-DS) is a training crawler operated by ROIS-DS. In plain terms, it collects pages to train AI models. Our database files it under data scrapers and ranks it Tier 6, the lowest priority: scrapers and tools that offer most sites little or nothing. 37 of the 39 data scrapers in our database share this tier.

Its safety rating is safe and its blocking impact is low. So the decision about Cotoyogi (ROIS-DS) rests on what you want from ROIS-DS, not on its behaviour. How we rate safety and impact.

How site owners treat Cotoyogi (ROIS-DS)

Our robots.txt study of the Tranco top 10,000 did not track Cotoyogi as a named token, so we do not publish an adoption figure for it. If you run a large site, your own logs are the best evidence of how often it visits.

Does it follow robots.txt?

Cotoyogi (ROIS-DS)'s operator does not clearly document how it treats robots.txt. Write the Cotoyogi (ROIS-DS) rule anyway, then confirm in your logs that its requests stop.

ROIS-DS crawlers and close alternatives

ROIS-DS runs only this one crawler in our database, so a single User-agent: Cotoyogi group controls everything ROIS-DS fetches through it.

Other data scrapers that do the same job (collects pages to train AI models) include TikTokSpider from ByteDance, Brightbot from Bright Data, CCBot from Common Crawl, Webzio-Extended from Webz.io. Deciding about Cotoyogi (ROIS-DS) is usually a decision about the whole group, so check how your file treats these too.

We first recorded Cotoyogi on March 17, 2026. ROIS-DS documents it on ds.rois.ac.jp, and we recheck that page before each release.

Which rule Cotoyogi (ROIS-DS) actually follows

Cotoyogi (ROIS-DS) reads exactly one group in robots.txt, the most specific one that names Cotoyogi, and never combines rules across groups. This short file shows the trap:

User-agent: *
Disallow: /private/

User-agent: Cotoyogi
Disallow: /drafts/
  1. Find the group. Cotoyogi (ROIS-DS) looks for a group naming Cotoyogi. One exists, so it ignores User-agent: * completely.
  2. Apply only that group. It is refused /drafts/ and nothing else.
  3. The surprise. /private/ is open to Cotoyogi (ROIS-DS), because that rule lives in the * group it no longer reads. To keep it out of both, repeat Disallow: /private/ inside its own group.
Test yourself: does a rule under User-agent: * apply to Cotoyogi (ROIS-DS) if the file also has a User-agent: Cotoyogi group?

No. Once a group names it, Cotoyogi (ROIS-DS) reads only that group. Put every rule you want it to follow inside its own group.

Test yourself: will blocking Cotoyogi (ROIS-DS) remove your pages from AI answers?

No. Cotoyogi (ROIS-DS) collects training data. Blocking it changes what future models learn, not which pages AI answers cite today.

Test yourself: is User-agent: cotoyogi the same as User-agent: Cotoyogi?

Yes. RFC 9309 makes user-agent matching case-insensitive. Paths are a different story: Disallow: /Blog/ does not block /blog/.

Should you allow Cotoyogi (ROIS-DS)? Decide by situation

Recommended setting for Cotoyogi (ROIS-DS) by type of site
If you are...Recommended setting
You publish content and want AI answers to cite itYour call. Cotoyogi (ROIS-DS) is a training crawler, so blocking it does not remove you from AI answers; retrieval crawlers do that job.
You license content and want to stop AI trainingBlock it by name with User-agent: Cotoyogi and Disallow: /.
You run an online shopConsider blocking it, especially on price and stock pages that competitors scrape.
Your server is under load from botsRate-limit before blocking. It is rated safe in our database.

Check Cotoyogi (ROIS-DS) on your own site

  1. Open /robots.txt on your domain and search for Cotoyogi. If it is not named, it follows User-agent: *.
  2. List the Disallow lines in the group Cotoyogi (ROIS-DS) follows and test your key URLs against them; the longest match wins, and Allow wins a tie.
  3. Look beyond the file. A firewall or bot manager can refuse Cotoyogi (ROIS-DS) even when robots.txt allows it, and that never shows in the file.
  4. Run our live AI crawler test to see how Cotoyogi (ROIS-DS) and every other crawler we track are treated in one pass, including firewall refusals.

Common mistakes with Cotoyogi (ROIS-DS)

The errors we see most often with Cotoyogi (ROIS-DS) in the files and firewalls we test:

  1. Assuming that blocking Cotoyogi (ROIS-DS) removes you from AI answers. It is a training crawler; AI answers are fed by retrieval and user-triggered crawlers with different tokens.
  2. Blocking Cotoyogi (ROIS-DS) with a broad User-agent: * rule that also catches search engines. Name Cotoyogi in its own group instead.
  3. Expecting a Cotoyogi (ROIS-DS) block to remove content already collected. robots.txt only affects future visits.

All three hide inside a file that looks correct, so check Cotoyogi (ROIS-DS) from outside after every change.

Spotting Cotoyogi (ROIS-DS) in your logs

robots.txt says what Cotoyogi (ROIS-DS) may do; your access logs show what it actually did.

Count requests

On a server with standard Nginx or Apache logs, this counts matching requests per day (adjust the log path for your host):

grep -iE "Cotoyogi" /var/log/nginx/access.log \
  | awk '{print $4}' | cut -d: -f1 | sort | uniq -c

And this shows which paths it requested most, which is the quickest way to see whether your Disallow lines are being respected:

grep -iE "Cotoyogi" /var/log/nginx/access.log \
  | awk '{print $7}' | sort | uniq -c | sort -rn | head -20

Check the requests are genuine

Anyone can send the Cotoyogi (ROIS-DS) user-agent, so confirm the source before acting on a match:

  • Cotoyogi: we hold no published IP list, so use reverse DNS where the operator documents a hostname and treat an unverifiable Cotoyogi (ROIS-DS) request with caution.

Frequently Asked Questions

What is the official user-agent string for Cotoyogi (ROIS-DS)?
The official user-agent string for Cotoyogi (ROIS-DS) is: Cotoyogi. Use this exact string in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. Matching in robots.txt is case-insensitive. Verify a request genuinely comes from Cotoyogi (ROIS-DS) by performing a reverse-DNS lookup on the source IP.
Is Cotoyogi (ROIS-DS) safe?
Yes, Cotoyogi (ROIS-DS) is a safe and legitimate crawler operated by ROIS-DS. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Will blocking Cotoyogi (ROIS-DS) hurt my SEO?
✅ No SEO Impact - Blocking Cotoyogi (ROIS-DS) does not affect your rankings in Google, Bing, or any other search engine. Cotoyogi (ROIS-DS) is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.
How do I block Cotoyogi (ROIS-DS) in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: Cotoyogi
Disallow: /

This instructs Cotoyogi (ROIS-DS) not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does Cotoyogi (ROIS-DS) respect robots.txt?
Cotoyogi (ROIS-DS) is operated by ROIS-DS and is expected to fetch and parse /robots.txt before crawling, following RFC 9309. For hard enforcement, combine robots.txt with server-level IP or user-agent blocking.
How do I verify if Cotoyogi (ROIS-DS) is crawling my site?
Search your web server access logs for the string Cotoyogi (case-insensitive: grep -i "Cotoyogi" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

Related Bots

WhatsApp us