Yrjö Kukkapuro designs reflect an awareness of space and its function, be it the space of classical or modern buildings. Furniture has been designed by making it complement the architecture of the building, by making it assimilate with the space without dominating it. Even though many products have originally been designed, tested and manufactured for a certain environment, many of them have proven appropriate for other corresponding projects. This may result from the universality of the products and the fact that they seldom point to any specific style or era. Some products have also been manufactured in different versions suitable for many public facilities.
Kukkapuro studied under Ilmari Tapiovaara and Olli Borg who taught him the practical meaning of functionalism, and young Kukkapuro greatly respected their wisdom and philosophy. Later he became the principal and professor of the University of Industrial Arts, and in his teaching he continued and expressed his functional thinking. His form language is based on a simple, clear and often imposing functionality which takes into account materials and their natural formal aspects as well.