Rank 531 in the Majestic Million · checked October 19, 2026
Does yahoo.co.jp block AI crawlers?
Yes, 2 of 17. As of October 19, 2026, yahoo.co.jp's robots.txt blocks GPTBot and Google-Extended from the whole site. It allows the other 15 everywhere. 2 of them are named in a group of their own; the others follow its rules for every crawler.
Its /llms.txt returns an HTML page, not an llms.txt file. Its homepage is 7,975 tokens of raw HTML, 53 as Markdown (0.7%) and 34 pruned for the question “What is yahoo.co.jp?”.
Each crawler, by its robots.txt rules
From https://www.yahoo.co.jp/robots.txt (87 bytes, 3 user-agent groups), parsed per RFC 9309. Blocked: no path allowed. Partly blocked: some paths disallowed. The rule counts are those of the groups that apply.
| Crawler | Operator | Verdict | Rules that apply | Disallow rules | Allow rules |
|---|---|---|---|---|---|
| GPTBot | OpenAI | Blocked | Its own group | 1 | 0 |
| ChatGPT-User | OpenAI | Allowed | Rules for all crawlers (*) | 0 | 0 |
| OAI-SearchBot | OpenAI | Allowed | Rules for all crawlers (*) | 0 | 0 |
| ClaudeBot | Anthropic | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Claude-User | Anthropic | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Claude-SearchBot | Anthropic | Allowed | Rules for all crawlers (*) | 0 | 0 |
| anthropic-ai | Anthropic | Allowed | Rules for all crawlers (*) | 0 | 0 |
| PerplexityBot | Perplexity | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Perplexity-User | Perplexity | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Google-Extended | Blocked | Its own group | 1 | 0 | |
| Applebot-Extended | Apple | Allowed | Rules for all crawlers (*) | 0 | 0 |
| CCBot | Common Crawl | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Bytespider | ByteDance | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Amazonbot | Amazon | Allowed | Rules for all crawlers (*) | 0 | 0 |
| meta-externalagent | Meta | Allowed | Rules for all crawlers (*) | 0 | 0 |
| cohere-ai | Cohere | Allowed | Rules for all crawlers (*) | 0 | 0 |
| Diffbot | Diffbot | Allowed | Rules for all crawlers (*) | 0 | 0 |
| ContextFetchBot (us) | ContextFetch | Allowed | Rules for all crawlers (*) | 0 | 0 |
Its homepage in tokens
https://www.yahoo.co.jp/, fetched once and converted locally with the ContextFetch engine. Tokens are characters divided by four, rounded up, the count the API reports in its X-Raw-Tokens and X-Output-Tokens headers.
| Group | Raw HTML | Markdown | Pruned |
|---|---|---|---|
| Tokens | 7,975 | 53 | 34 |
Read yahoo.co.jp through ContextFetch
GET /r/ returns a page as Markdown, with X-Raw-Tokens and X-Output-Tokens headers. Add ?q= and a question to get only the passages that answer it. No key needed for 25 requests a day; a free key has 2,500 credits.
curl -si "https://api.contextfetch.dev/r/https://yahoo.co.jp/"curl -X POST https://api.contextfetch.dev/v1/keys/freeHow ContextFetchBot behaves · All sites and the method · Raw data
Give your agent the web
Your free key comes with 2,500 credits, no signup. One credit reads one page.