What is the name of this book?

I read this book over twenty years ago. I do not remember the name or the author, only bits and pieces of the story itself.


It starts after WWII in Japan. The central character is white and he is in Japan to learn the martial arts.


At one point he is trying to learn 2 different styles at the same time and not doing very well in either. One of his instructors tell him the story of the dog that chased two rabbits,


The dog lost both of them.


Another part of the book went something like this. The central character is by himself on the subway and he is accosted by a drunk Japanese guy. He takes a couple of hits and then gets tired of it. So the next time the Japanese guy takes a swing, our hero deflects the arm up exposing the armpit (which has a bundle of nerves located there named the floating rib). One short punch later the drunk is out on the flour and no one says anything to our hero. He is worried that if his instructors find out that they might ban him from training for a while.

What is the name of this book?
See if you can find it in Amazon.com, they have an advanced search you can do for text within a book.
Reply:mr popers penguins??
Reply:life in the martial arts