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.
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.