The house is known as Fujigaoka M and is more than two decades old. The purpose of the renovation was to create a space that was both more modern and more comfortable for the married couple who was to live there.
The central portion of the house, referred to as the “inner terrace” by the renovators, acts as a room separation but does not close anything off. Instead, it offers space for storage as well as display walls for personal photos, art, and books. The central wall therefore becomes a personal element of the house that is easily updated for seasonal changes or the occasional redecoration.
Source, credits, details and more at: home-designing.com