A caricature of Japanese actor/filmmaker (as well as comedian, painter and tap dancer) Kitano 'Beat' Takeshi. I mainly know him from two fave Japanese films, 'Zatoichi' and 'Battle Royale'.
This was scanned pencil, overpainted with texture brushes and texture overlays in Photoshop. Here's a link to the original pencil drawing before Photoshop textures were added.
...and on a different matter, this blog just turned 5 years old!