Currently perusing Yakuza Moon by Shoko Tendo.
I heard reviews that it was not really good. That it did not talk about the yakuza and how they ran. I think Confessions of A Yakuza, does not do that either. But it is a good non-fiction story about a real and maybe one of the last gang bosses of Japan. It is not really a chronological story to do with history at all. More of a memoir style written by the yakuza's doctor. But a very romantic tale in the literary sense. So far I am enjoying yakuza moon , it is more about the woman and her tale, about the drugs, and involuntary sex, and the whirlwind life that such living brings about.