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Four Leaves frame model

The arched form of the roofline provides a cozy, second-floor interior space.

One portion of the roof arches.

Located in Karuizawa, a popular summer resort town in Japan’s Nagano Prefecture, Four Leaves is a weekend getaway designed to accommodate the homeowner and their guests in a lush, sylvan setting. Designed by Kentaro Ishida Architects Studio (KIAS), the highlight of the stunning, 2,400-square-foot house is its sloping, angular roof sections that are delicately assembled to resemble fallen leaves.

First built in 1959 as acclaimed architect Jim Olson's first project, this modest bunkhouse in the woods grew into an extraordinary family retreat.

The 180-square-foot RV is currently parked on their lot in Ventura, California.

Duerksen now runs his own architecture firm out of the home.