It's a great game!
If you include the supernatural elements in the game (oni/demons and so on), don't forget about using 25mm and 28mm monsters. For example, Dixon's oni and bakemono goblins will scale nicely with 1/72 humans (justifying the Big trait that they have in the example profiles in the book). You might be able to find some old Ral Partha 'oriental adventures' figures that will work at a more human scale too.
Caesar's 1/72 zombies/undead box includes a very nice Chinese hopping vampire!