Hatena

Hatena is a Japanese web service bot that automatically visits web pages to gather information for its social bookmarking, blogging, and content aggregation platforms.

Hatena::RUssia::Crawler is a web crawler operated by Hatena, a Japanese internet services company, used to fetch and index web content for their various services and platforms.

HatenaBlog-bot is a web crawler operated by Hatena that fetches content from websites, likely to generate link previews, embed cards, or other content previews when users include links in their HatenaBlog posts.