The site is an established villa district in Karuizawa that has long cherished and maintained its moss gardens.

To create a human presence within the dense environment crafted by the plants while minimizing impact, the building was designed with a mushroom-like form.

The building's form was planned to respond to the trunks and branches of broad-leaved trees native to Karuizawa, such as the Japanese oak. By observing the root patterns and branch growth of nearby trees and maintaining clearance distances to avoid impacting existing vegetation, the plan evolved into a hexagonal shape.

Surrounded by the fragrant scents emitted by the plants, the rustling of leaves in the breeze, and the chirping of birds,

being here allows one to feel a sense of oneness with all things in nature.

To balance with the trees and soften the visual volume from outside, the floor and roof were divided into three sections with level differences. This creates distinct, independent corners internally, yet they are covered by gently curved ceilings, giving an organic sense of expansiveness.

Despite being a single room, diverse spaces were born.