There are for real tattooed ladies in kpop, like Amber for f(x):
But what appears more common are subtler, simpler designs, little more than line drawings, for eg Lee Hyori:
Or like this guy:
Especially that kind of collar bone sentences or designs is what I've started to see around campus. Not statement-y really. More like permanent jewelry, I guess.
Or who knows, I might be seeing temporary tattoos and losing my mind