Hi
Some very nice work there.
Well I would say it is black and shade portrait work mostly inspired by stained glass art.
It also has Far Eastern influences and I would simply place this under the ‘Custom’ label 😀
There are some types of tattoos that can be placed under a label such as old school or tribal but with a custom piece like that it stands alone.
I would def have work done by that artist.
Take Care
Matthew