The other day I was in the Japanese grocery and saw a box of hanafuda decks on the counter, and since I had just seen Summer Wars, I had to get one.
There are games that use dice of every shape and color with all sorts of things on the faces.
There are games that use custom decks of cards, Everway was one of the first I think.
There are games that use one or more decks of playing cards, Vs. Monsters, Castle Falkenstein, etc.
There are games that use colored stones, and games that use colored poker chips.
There's even, apparently,
But I've never seen a RPG that uses a hanafuda deck.
Right now I'm still just learning the basics, like Koi Koi, but maybe some day soon...