I was heartened to read that the author India Millar is married because this is one sexy hot historical fiction novel set in Japan decades past. All those quite hot images she draws, wow; hence, my relief that she personally more than likely gets what she needs and does not have to rely on her most imaginative pen to get it.
That said, there is more to this novel than the sexual acts; there is the sexual politics, which we perhaps can assume in Japan in this era are quite dominantly chauvinistic, even degrading to women and dashing of any of their hopes for self-fulfillment economically or socially beyond their assigned very limited roles. Basically, what you are born into, whether gender or class, determines how one will marry and where one will stay economically and socially for the remainder of his/her life. Further, the class differences reveal the callous disregard the self-serving"noble" class has for the suffering of the "peasants." Millar creates a number of despicable characters to illustrate quite well these social problems and restrictions; all the characters, major and minor, are quite vividly drawn and developed.
Reading with our modern minds we see the obvious hypocrisies and inequities of these worn out Japanese systems. Yet, as the subtitle suggests, there are exceptions to these caste and gender-determined systems, and those who choose them often have lives of hardship and severe discipline; these are the samurai, and most intriguingly to me, woman warriors who train with them. This is an exciting adventure story of one of the women. "The code imposes seven virtues on the true samurai: loyalty, courage, truthfulness, honor, righteousness, politeness, and benevolence."
Early in the novel the main character says, "I was the catalyst for all the changes, nobody and nothing else. I was learning to fight like a man and to think like one. For a moment, I felt almost sorry for my future bridegroom, who was no doubt expecting a dutiful, obedient wife."
One of the ironies of the culture revealed by Millar was the contrast between a highly rigid and controlled society of assigned gender and caste roles, largely based on a strict sense of duty and saving face in public, also can have sexually promiscuous private lives with very little boundaries. Outside/inside, what one looks like in public and what one acts like in private are dramatically different ways of being. I found this intriguing.