Some supposedly Japanese users are sending signup requests with very vague reasons. I can't be sure, so unfortunately can't accept some of them. If you got rejected by mistake, please let me know by email at admin@mementomori.social.
To make sure your account gets approved, always introduce yourself and give a clear, legitimate reason for joining us. Everyone, regardless of language, is welcome to join mementomori.social, but we have a signup process for a reason - it helps us maintain control, safety, security, privacy, and properly shared resources.