Hello!
I'm not a potential GM unfortunately but I am also looking for a game that sounds similar to what you are looking for, so perhaps we can join forces. This is my wanted GM thread here:
link to a message in this forum.
My suggestion to you is the rpg Legend of the 5 Rings, which is set in a fictional Asian universe called Rokugan. It's heavily Japanese, but the action takes place in a divinely guided empire (called Rokugan), sort of like the Chinese dynasties, instead of the warring states that Japan is more famous for. It has all sorts of other Asian influences as well and is based on the concepts of Bushido and Honor, which is very central to the rules. I think it would be the type of martial arts game you would be looking for.
I think the game is worth looking up, and I know a sample of the rules was released for free because of Free RPG Day. It's a brief published adventure for the game called Legacy of Disaster and you can find some basic rules in there. Otherwise, you'll need to get a copy of the Core Rules at least for more advanced options.
If you are interested and I find a game, maybe you can join us as well.