Ah, yes. Thanks for the additions, Tim.
With such a variety of possibilities, I would hope the ninja theme stays minimal.
You are right that Fu dogs are Chinese, but similar variations were copied to other cultures including Japanese. The japanese one starts with a 'k', I think.
The versions of Kappa I ve seen have pools of water in the top of their heads, and if it spills out they are in trouble.
-Palanquins, I think they are called, would be cool.
-Also, a weapon/tool used by both farmers and warriors--Kama(short sythe).
-A japanese garden would be super cool, even if only a small set.
-Yabusame, horseback archery.
...and if this is done, it can be blended with current themes to bring in the Meji era.
See, Playmobil..such possibilities!