Kingdom

Is there any excuse for slow zombies?

Plot armor.

they're not alive, and lack nutrients to walk or run fast

You make slow zombies when what you really want to write is a soap opera

Seoul Station is the superior gookzombie-kino.

It's horrible, I couldn't even get past the second episode. The plot is convoluted, the main character is bland and unsympathetic and there is not enough waifus to keep our attention in the meantime while a plot builds up.

Kingdom?
More like Kinodom

Hero (2002)

Those are possessed by demons, not zombies.

Hell yeah, love this movie.