Cotoyogi (ROIS-DS)
SafeUser-agent: Cotoyogi
Category: Scrapers
SEO impact if blocked: 2/10
ROIS-DS
1 crawler operated by ROIS-DS
Who ROIS-DS is, for site owners
ROIS-DS operates 1 crawler in our directory, filed under Scrapers. Its crawl behaviour is rated safe.
Blocking ROIS-DS carries an SEO impact score of 2/10. Blocking impact is rated: Low - No SEO ranking impact.
Our recommendation for ROIS-DS: Generally safe to allow; provides legitimate crawling value.
ROIS-DS at a glance
| Operator | ROIS-DS |
|---|---|
| Crawler in directory | 1 |
| Categories | Scrapers |
| SEO impact if blocked | 2/10 |
| Crawl behaviour | 1 rated safe |
| Official crawler docs | ROIS-DS crawler documentation |
Crawler operated by ROIS-DS
What ROIS-DS's crawlers are for
ROIS-DS runs 1 crawler in our database. Grouped by the job each one does:
- a training crawler:
Cotoyogi
The highest-priority token is Tier 6. That makes ROIS-DS a lower-priority operator for most sites: worth a deliberate decision, but rarely the one that decides your visibility.
How site owners treat ROIS-DS
None of ROIS-DS's tokens were among the names tracked in our robots.txt study of the Tranco top 10,000, which usually means few large sites write rules for them yet. Your own logs are the best evidence of how often they visit.
Writing one policy for ROIS-DS
A robots.txt file cannot say "ROIS-DS"; it can only name ROIS-DS's tokens, one group at a time. With a single token, one group is the whole policy.
# One token controls everything ROIS-DS fetches through it
User-agent: Cotoyogi
Disallow: /private/
Allow: /- Decide per job, not per company. Training, search and user-triggered fetching have different trade-offs, even from the same operator.
- Name every token you mean. A token you leave out follows
User-agent: *. - Repeat shared rules. A named group ignores the
*group, so copy anyDisallowlines you still want it to obey. - Verify from outside. Run the AI bot checker after any change to see the result for each ROIS-DS token, including firewall refusals.
Test yourself: does User-agent: ROIS-DS block all of ROIS-DS's crawlers?
No. robots.txt matches crawler tokens, not company names. Use the token Cotoyogi.
Test yourself: if you block one ROIS-DS token, are the others blocked too?
No. Each token is read separately. Blocking one leaves the rest following whatever group applies to them.
Each ROIS-DS crawler, explained
A one-paragraph brief for every ROIS-DS token in our database, covering what it does, how it treats robots.txt and how often large sites write rules for it:
- Cotoyogi (ROIS-DS) (
Cotoyogi, Tier 6): a training crawler that collects pages to train AI models. Rated safe. 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. Not tracked in our robots.txt study.
Common mistakes with ROIS-DS's crawlers
The errors we see most often with ROIS-DS's crawlers in the files and firewalls we test:
- Assuming that blocking ROIS-DS's crawlers removes you from AI answers. It is a training crawler; AI answers are fed by retrieval and user-triggered crawlers with different tokens.
- Blocking ROIS-DS's crawlers with a broad
User-agent: *rule that also catches search engines. NameCotoyogiin its own group instead. - Expecting a ROIS-DS's crawlers block to remove content already collected. robots.txt only affects future visits.
All three hide inside a file that looks correct, so check ROIS-DS's crawlers from outside after every change.
What our own data shows about ROIS-DS
Everything below comes from the AI Crawler Check bot database and our two most recent robots.txt scans of the Tranco top 10,000, not from ROIS-DS's marketing. ROIS-DS has one token in our database, so the whole picture fits in one place.
Cotoyogi in our records
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. No file in our top-10,000 scans names Cotoyogi, so any rule you write for it puts you ahead of almost every large site.
Among the 39 data scrapers in our database, Cotoyogi sits tenth by priority (Tier 6), level with Amazon Kendra, ApifyBot, Barkrowler, BLEXBot. 29 of the 39 share its safe rating. Other operators with a crawler that collects pages to train AI models: ClaudeBot (Anthropic, Tier 1), Google-Extended (Google, Tier 1), GPTBot (OpenAI, Tier 1), Meta-ExternalAgent (Meta, Tier 1), AI2Bot (Allen Institute for AI, Tier 2). A policy for Cotoyogi is usually a policy for these too.
A decision record for Cotoyogi
Teams that review crawlers once a quarter keep one short entry per token, so anyone can see why a rule exists and when it was last checked. Filled in from our data, the Cotoyogi entry reads:
- Operator and job: ROIS-DS; it collects pages to train AI models.
- Priority and behaviour: Tier 6, rated safe, blocking impact low.
- Suggested starting point: Your licensing call: Disallow to refuse training, Allow to permit it.
- Enforcement: Cotoyogi's operator does not clearly document how it treats robots.txt. Write the Cotoyogi rule anyway, then confirm in your logs that its requests stop.
User-agent: Cotoyogi
Allow: /Paste the line into the validator with one of your own URLs before it goes live. Revisit the Cotoyogi entry once a quarter, or when ROIS-DS publishes a new token next to it.
Checking Cotoyogi on your own site
Because ROIS-DS runs only Cotoyogi in our records, one check covers the whole operator. Search your access logs for the string Cotoyogi over the last 30 days, note how many requests it made and which paths it asked for, then compare that with what your robots.txt allows. Match the requests against what ROIS-DS publishes about the crawler, since that page is the only authority on its behaviour. A Tier 6 crawler rated safe rarely needs more than a quarterly look, and our log checker does the counting for you.
How top sites treat ROIS-DS's crawlers
From our robots.txt study of the Tranco top 10,000 (5,583 valid files, fetched October 20, 2026):
None of the tokens for ROIS-DS's crawlers is tracked by name in our study. For scale, 20.1% of top-site files block at least one AI training crawler and 4.3% refuse every unnamed crawler with User-agent: * and Disallow: /, which would catch ROIS-DS's crawlers too.
More questions about ROIS-DS
- Will blocking ROIS-DS affect my Google rankings?
- Only if one of its tokens is a Google search crawler. None of ROIS-DS's tokens are Googlebot, so classic Google rankings are unaffected.
- How quickly does a robots.txt change take effect for ROIS-DS?
- Crawlers cache robots.txt, commonly for up to a day. Expect a change to apply within about 24 hours, and confirm it in your logs.
- Can I allow ROIS-DS on some sections and block it on others?
- Yes. Inside the group for
Cotoyogi, addDisallowlines for the paths to keep private andAllowlines for exceptions. The longest matching rule wins. - Does blocking ROIS-DS delete content it already collected?
- No. robots.txt only controls future visits. For content already collected, check whether ROIS-DS offers a removal or opt-out process.
- Is a firewall block better than robots.txt for ROIS-DS?
- A firewall enforces the decision, while robots.txt asks politely. Many operators recommend robots.txt because blocking their IPs can stop them reading your rules at all. Use robots.txt first, and add a firewall rule only if requests continue.
A five-minute ROIS-DS review
- Confirm the token. Compare the user-agent in your logs with the tokens listed on this page. A close spelling is not the same crawler.
- Decide the outcome per crawler. Use the briefs above to choose allow, limit or block for each token.
- Write the group. Add or edit one
User-agentgroup per decision and repeat any shared rules inside it. - Publish and wait. Allow about a day for crawlers to fetch the new file.
- Confirm the result. Check your logs, then run the AI bot access checker to see the outcome from outside, including any firewall layer.
How to block or allow ROIS-DS in robots.txt
This rule covers the single crawler ROIS-DS operates. Add it to the robots.txt file at the root of your domain.
Block ROIS-DS completely
User-agent: Cotoyogi
Disallow: /
Allow ROIS-DS explicitly
User-agent: Cotoyogi
Allow: /
These ROIS-DS rules ask; they do not enforce. If a ROIS-DS token ignores them, block it at the server or CDN. Paths are case-sensitive, and each rule matches the token, not the full user-agent string.
Frequently asked questions about ROIS-DS
What crawler does ROIS-DS run?
ROIS-DS operates 1 crawler in our directory: Cotoyogi (ROIS-DS) (user-agent Cotoyogi).
Should I block ROIS-DS?
Generally safe to allow; provides legitimate crawling value. The SEO impact score for blocking is 2/10, where 10 means blocking costs you the most visibility.
How do I block ROIS-DS in robots.txt?
Add the following to robots.txt at your domain root: User-agent: Cotoyogi then Disallow: /.
Does blocking ROIS-DS hurt my search rankings?
Blocking impact is rated: Low - No SEO ranking impact. Google's own ranking crawler is Googlebot, which this operator does not run, so blocking ROIS-DS does not by itself remove you from Google's index. What it can change is whether AI assistants and analytics tools can read your pages.