This is a woodblock print. The same technique that is used to make all that old Japanese porn we know and love so well. You might ask then, why take this technique into the genre of portraiture? Good question.
This particular print was made using three blocks, four colours, and five printings (the background twice). It follows in the tradition, if it must at all, of the mid-twentieth century sosaku hanga movement in Japan. Books were written. Now, in the the 21st century, technique is back at its rightful place at the top of the cliffs of virtue that determine artistic merit. That's how we know what we're looking at.
To be fair, printmakers have always been preoccupied with technique. Without it they couldn't make their prints. I had to carve the two colour blocks three times each before I had the registration just right, which is a waste of wood. And quite sad.