I'm at chapter 10, page 337 of Reason, where Naomi Ishida explains where and why he decided to become an architect. That's just about exactly halfway. Since my last update it's been around 50 working days, and 184 pages, for 3.6 pages per day on average - call it 3.5. At that pace it's 95 days to finish the book, or just over four months. To finish the book within a year I'd have to step up the pace a bit. Which I won't; the pace fits the book, and taking just a few minutes every morning doesn't intrude into anything else.
I just wish Miyabe - the author - didn't have such a ravenous appetite for asides and digressions. This latest digression on the importance of a well-designed internal environment in public buildings for people's well-being is kind of fun, but I don't so far see how this actually relates to the four murders that the book is about; I doubt it was a mad murdering rampage caused by a flickering fluorescent strip.