This book constructs an epistemology of concrete things as opposed to the abstraction of the modern object. This construction nevertheless presupposes concepts starting with “mediance” and “trajection”. A concrete thing is not only an object that is circumscribed and fixed in its topos; it is also the process that involves our existence. This chapter shows some of its concrete manifestations in the ecumene. Concretely, it is not enough to shield the animal body from bad weather, because that body is never just animal; it is human, and its mediance needs to be lodged just as much according to a milieu as in an environment. Life is what assembles signs (P) and substances (S) to make them concretely into things (S/P). Japanese culture never ceased to elaborate, develop and update the linguistic disposition towards concreteness in the course of its history.