Cotoyogi

Operator

Joint Support-Center for Data Science Research (ROIS-DS)

Type

Crawler

Official page

ds.rois.ac.jp

robots.txt token

Cotoyogi

Follows robots.txt

Yes, according to ai.robots.txt.

In Vireo

Excluded, reported under Other bots

What it does

Scrapes data for AI training in Japanese language.

ai.robots.txt describes its function as: AI LLM Scraper.

Source: ai.robots.txt.

User agent

Requests from Cotoyogi carry a user agent like this:

Mozilla/5.0 (compatible; Cotoyogi/4.0; +https://ds.rois.ac.jp/center8/crawler/

Device Detector identifies it with this pattern (a case-insensitive regular expression):

Cotoyogi

Anyone can put any name in a user agent. Where the operator publishes IP ranges, checking the request's address against them is the way to confirm a visit is genuine.

How to block or allow Cotoyogi

Add a group for its token to the robots.txt file at the root of your site. To keep it out of the whole site:

User-agent: Cotoyogi
Disallow: /

To let it crawl everything, use an empty Disallow: or Allow: / instead. WordPress serves a virtual robots.txt that many SEO plugins let you edit. A real robots.txt file uploaded to the site root takes its place.

robots.txt is a request, so it only works on crawlers that honour it. A bot that ignores it has to be blocked at the server or firewall, by user agent or IP address.

How Vireo counts Cotoyogi

Vireo keeps requests from Cotoyogi out of your pageviews and visitors and counts them on its bot report under Other bots, so you can see how much it left out rather than wonder why your server logs show more traffic.

Checked by running Vireo Analytics' own bot filter over Cotoyogi's user agents.

Sources

• Cotoyogi information page (ds.rois.ac.jp)
• Matomo Device Detector, bots.yml (LGPL-3.0)
• ai.robots.txt (MIT)