Mastodon is a decentralized, federated social network, with an interface similar to Twitter. Because Mastodon is federated, this means that users of one instance can follow and interact with users on many other Mastodon instances.
Yamabi.co is a Mastodon instance for fans of the Touhou Project series, although you are free to post about whatever you want here. It's a great place to meet others with a mutual interest in Touhou. If you aren't a fan of Touhou, I'd recommend making an account on a different instance; you'll still be able to interact with users on Yamabi.co. You can view a curated list of Mastodon instances here, but there are many more.
The following guidelines are not a legal document, and final interpretation is up to the administration of Yamabi.co; they are here to provide you with an insight into our content moderation policies:
Mastodon generally allows you to view content from and interact with users from any other server in the fediverse. These are the exceptions that have been made on this particular server.
No data from these servers will be processed, stored or exchanged, making any interaction or communication with users from these servers impossible: