If you haven't you should watch his stuff. There's only 4 films and one TV series due to his untimely death.Oooops, sorry my bad! I'll try searching on MAL next time! Apologises for the confusion on my part...
Hard to say where to start as they are all pretty mind bending. Probably Tokyo Godfathers. All films are available here, but Millennium Actress is DVD only at the moment and might be harder to find.
His TV series Paranoia-Agent is on Viewster.
We’re talking about the lion from Bleach, right?