The Oshikamo House, by Katsutoshi Sasaki + Associates, could simply be described as an inconspicuous shell filled with spaces with varying degrees of: privacy, light and importance. So, to express these aspects in a book makes quite a good deal of sense, because a book can be described in a similar way: nondescript covers filled with pages of literary space.
My process of subtraction was meant to expose the hierarchy of spaces within the project. I focused on looking at the project in section, allowing the covers to act like the anodized aluminum siding, the pages as the spaces within, and the spine as the foundation and central public corridor. The first thing that is evident when looking at the book is the curvilinear shape that is cut into the covers. This allows the visual connection between the book and the original project without being impeded by the iconic shapes the house is known for and solidifying the description of the covers/elevations as a simple box around interesting spaces. The areas with the most subtraction lie in the middle of the book, representing the central public core of the building and the glass light well, that goes from floor to roof, that is the defining moment of the house. The other spaces represent the more private spaces, the bedrooms and sitting area one step higher than the central core and the bathroom with the least subtraction.
I think this diagram is successful at homing in on the central design aspects of this project. It gives you another view of the separation of public and private spaces in a way that allows you to experience the entire building at one time.