The renovation solves the major problem of how to bring natural light into the dark rooms in the central part of the building in a simple way. Without changing the size and position of the existing windows, the building is designed to bring the natural phenomena already present in the environment into the building by manipulating the color and volume of the use of white. Low walls that drop from the ceiling are known as 'kamoi' or 'hanging walls' in Japan. He has harmonized the design while keeping the low, horizontal proportions of the existing building, which are unique to Japan.