which is best martial art

[Sketchy]

Muay Thai, some BJJ and wrestling and you're good to go.

[LuckySunshine]

For me, i tried at least 5 or 6 art forms, but Tai Chi is more spiritual.
It's a mind body thing.

My guess, if you want to become better at any MA, practice Tai Chi and it will improve your style, speed and elegance.

I also practice Brazilian Capoeira, does anyone know about any Dojo's in Tokyo?
Judging by the amount of Brasillero (Brasil people) in Japan there must be a few.