In pre-WW2 Malaya, Anglo-Chinese Philip Hutton befriends Japanese aikijutsu master Hayato Endo. It doesn’t turn out well.
Surprise feature of this book: it’s a reincarnation story!
Probably won’t read Garden of Evening Mists as I understand it’s in a fairly similar vein, only with Japanese gardens instead of martial arts, and Cameron Highlands instead of Penang.