Not a bad article. "Accurate" is a bit misleading. True to source and not using unverified primary source would be more
"accurate" as to what would be within policy, as well as keeping out original research and synthesis. The Wikipedia problem is mostly about biased or simply poor enforcement of policies.
Dekimasu is possibly Japanese. Time zone is either US ET [could also be Brazil) or CT or Japan, most likely. So the user, claimed to be a professor in the article, moves around some. It's plausible. I had extensive interaction with James Heilman (Doc James). Generally a good guy, was not yet a licensed physician when I first knew him, but apparently became so.
However, there is a limit to what expert editors can do. The project did not create reliable structure, the very concept of reliability is "un-Wikipedian." No responsibility equals no reliability. In spite of the adhocracy working to quickly create a project, it could never make it reliable, or not without much more sophisticated structure, which has always been rejected.
I looked at
Bleach (manga) . It absolutely sucks to have super-powers in high school. Eric, one of the factions I first tangled with on Wikipedia was the fancruft deletionists, who were willing to sock and generally create extensive disruption in order to delete "fancruft." My God, effing priorities! In any case, Dekimasu clearly was knowledgeable about the manga series and was able to handle Japanese sources. I suspect high school age or early twenties.
Not a bad start, began doing quasi-admin wikignoming early on, made newbie errors and fixed them.