R4 is a minimalist house located in Tokyo, Japan, designed by Florian Busch Architects. The site, a left-over perched between manifestations of not only for the location improbable amassment of earnest junk, proved more and more critical in this process: inconspicuous despite its prime location, dominated by a myriad of constraints that make it highly difficult to build on, between narrow road and a derelict cemetery, flanked by a 40m-tall apartment building and other nondescriptness, sights of a nearby park. Here, the architectural response could hardly be one mass of undifferentiated transparent homogeneity. Instead, a logical response was a field of multiple, varying focal points that would deal with the surroundings at discrete levels as well as in the overall unity of the office building.