This is probably my first encounter with contemporary Japanese literature---although sadly, via a translation. So I'm not sure if my observations on the style would translate to the original, or what, but anyway:
I liked this book. I was also surprised by it: the way the story evolves is mostly unpredictable, and when it looks like it's becoming predictable, it again twists again to much surprise of the reader. Also: the amount of sex and drinking totally caught me by surprise as well.
The language was also interesting; it's terse but the scenes are described with succinct accuracy. It's very much like an elegant skeleton.
I feel like I'd maybe go back and read it again to pay attention to the story from the optic of someone who already knows the end. Will I feel differently about the characters?