Yeah, the phonetic spelling/Hepburn romanization would be Zajirou. But the author (per his Twitter is username and how he spells it elsewhere) opts for Zajirogh.
The manga description may need updating as well – for consistency – but not as important.
Thanks!
The author of https://mangadex.org/manga/20023/rapid-commuter-underground officially romanizes his name Zajirogh (and this is how it's listed on Baka-Updates Manga, MAL, etc.), not Zajiro.
@Nick86 Translations for the first chapter are done and I'm working on typesetting it now. Note: It's… bad, and I don't know if I'm going to continue. But if you're just reading for the art then whatever.