Let The Right Hon InI'm gonna be that guy and point out that when people say "the Fediverse" what they probably more specifically mean is "what's implemented by Mastodon, a social network built on top of ActivityPub" and that for certain conversations, this matters.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.