@shouldsleep And so is the tag "historical" and "fantasy". In the tag historical, we have middle age, victorian era, antiquity, World wars, ... We even have Alternate worlds with a past era settings, even some of them contain fantasy or sci-fi (In particular, most of the wuxia have the historical tag)
In fantasy, we have eastern and western fantasy. Nearly all isekai are fantasy, same for xanxia (Things like tales of demons and gods), and even some of the video-game (Vrmmo,...) have the fantasy tags. I mean 1/5 of the mangas have the fantasy tag, that's pretty broad.
As for the logistical work: When we create any tag, it involves a lot of work. Tag are created when a popular theme is present enough to require the need of adding one, so it always concern a lot of mangas. Also, the tagging of the mangas is not all at once, lot of them are added little by little. For that reason, lot of mangas have missing tags, and sometimes wrong ones.
In fantasy, we have eastern and western fantasy. Nearly all isekai are fantasy, same for xanxia (Things like tales of demons and gods), and even some of the video-game (Vrmmo,...) have the fantasy tags. I mean 1/5 of the mangas have the fantasy tag, that's pretty broad.
As for the logistical work: When we create any tag, it involves a lot of work. Tag are created when a popular theme is present enough to require the need of adding one, so it always concern a lot of mangas. Also, the tagging of the mangas is not all at once, lot of them are added little by little. For that reason, lot of mangas have missing tags, and sometimes wrong ones.