While women have played always played a prominent part of Sano Ichiro's world and mysteries, they take center stage in this volume. The Concubine's Tattoo at last elevates this series to what it is capable of being: an in-depth look at Japanese society for all walks of life. Not only must Sano solve the mystery of the murdered courtesan, he must also grapple with how the world he has taken for granted treats the people it deems less than. It's a compelling novel full of larger-than-life characters who are relatable across time and cultures.
After stalling for two books, Sano finally marries Ueda Reiko, the daughter of the local magistrate. He is looking forward to a quiet home life with a docile wife, but what he gets is someone as brave, as stubborn, and as intelligent as himself. The two clash almost immediately as Reiko is determined to help him solve the murder. However, it's not just chauvinism that prevents Sano from letting Reiko help. He knows how dangerous the work can be, and he's still haunted by the death of one of his assistants from the first book. He won't let that happen to Reiko, but he's unable to fully articulate that fear of his.
Reiko is a wonderful character, if a bit naive, but that's to be expected considered her upbringing. For his part, Sano's newest case opens his eyes to how society affects women. His investigation into Harume's life, her mother's, and those of the other concubines reveals to him how limited their options are, and how some of their talents are utterly wasted by their positions. While I doubt Sano is now a model feminist, his transformation is believable, and the novel does an excellent job of breaking down women's roles, something that is largely ignored. This extends beyond the women's roles to those of the eta, a class of 'undesirable' people who have lurked throughout the novels. Readers finally learn more about them, and we see along with Sano, how samurai society has imprisoned everyone in a rigid hierarchy.
Part of Sano's process to solve the mysteries is to go through the victim's life, and I particularly enjoyed learning about Harume's. There were so many twists. Just when you think you've figured it out, there's conflicting evidence. The characters of the Miyagi clan, Lady Ichiteru, Lady Keisho-In enliven the novel. Even the evil chamberlain Yanagisawa gets a new dimension in this novel that is both heartbreaking and justified. You feel just a tinge of pity for him before watching in horror as he ruins it for himself.
A word of caution: this novel is just as graphic and sexual as the previous two books, particularly since this is dealing with the world of concubines, and sexual politics is the name of the game. There are many scenes of coercion, some assault, sweet unions, and then some out-there stuff. Some folks might be uncomfortable reading these scenes while others might just be plain weirded out. There's definitely a lot to wade through, so keep that in mind.
Even with that warning, I still think this is one of the stronger books in the series thus far. The sex scenes are all about power - who has it, who lacks it, who wants it - and I think they're more purposeful than they have been in the past. Overall, it's a great mystery and a fascinating look at 17th century Japanese society that I have to recommend this book.