"Elementary, my dear Watson!"
1. Even though the new measure here made it more difficult for him to appear, he's a person with strong obsessions and he thinks most of the time how to come back and to start to do what he wants.
So, first, I expected him soon.
2. "Komobini" is very similar to the Japanese コンビニ (konbini). He's learning (or at least trying to learn) Japanese and he already knows some simple words and sentences in that Altaic language. So, I made an educated guess, that it's just his way to spell it (not very correct) in/with Latin letters.
3. The third (which is showing the probability "more likely" than the second) is that his registration e-mail is with a 100% Japanese word ("hikikomori"). Not just a Japanese word
but the one that he used in that post (
http://www.seo-forum-seo-luntan.com/else-topics/why-do-i-feel-so-good-today/msg53196/#msg53196) written in Japanese (as "引き篭り").
So, if he start again to demonstrate hallucinations, curses, lies, insinuations, calls for violence, death and so on, just BAN, BAN, BAN!
If he pretends to be another incel/nearcel/noncel/..., then you may let him participate (
as long as he do not pose a serious thread to the community and to out earnings!)
As you may notice, he is a very lonely, isolated person, who is unable to find real friends, love, understanding and he's kicked out from many other forums. So, if he just hides his real self and pretends to be a better, a more normal subject, give him this chance.