I don't tend to read "true crime", and in fact I rarely even pay attention to crime stories in the news, but this had good reviews and the Japanese angle caught my attention.
It's an immaculately researched and balanced account of the disappearance of a British woman working in Japan which manages to provide some insights into some aspects of Japanese society without falling into cliché or generalisations (although what it reveals about their police and courts is pretty damning). It also examines the different ways people deal with trauma and grief without judging those who behave differently than how we might expect or want them to.