The M house is located in a quiet forest, close to the old part of Karuizawa town, which has been a well-known summer resort since an English missionary found it 100 years ago.The site is facing with a busy street with tourist’s cars and buses, especially in the summer time; but the garden-side is a quiet and lovely forest. There are 3 daughter’s families and their parents, living independently in the M house, sharing the same view of trees and animals.The curved shape of this house is symbolic of “embrace” of the forest and nature, but also, it allows three families to feel closer together, although they may not see this unity directly. To keep the quiet and privacy required by the client, the street-side facade is a thick RC structure with small windows, while the garden-side toward the forest is composed with wide grass windows, to allow the families to enjoy the view of the forest.There is also an expanded wing, a garage, and a study room for visitors.A small folly in the garden was built for parties, and space for more than 20 cars is available in front of the façade.