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The dining room and the living room, though occupying the extension and the original part of the house, respectively, read as one L-shaped great room along with the kitchen.

In what's now known as the music room on the ground floor (previously called the front parlor), a stucco-clad fireplace was paired with a stone base and rounded edges capped in Accoyo wood.

On the third floor, the wall outside the kids' bedrooms was left exposed.

The primary bathroom is a recreation of what Peter and Abigail had in Tokyo, particularly a tub that allows one to preset and maintain a desired temperature.

The primary bathroom features floating walnut cabinetry set against Accoya walls.

The renovated stairway now has a rounded wall at its base, to pair with the curved wall across from it and make room for more natural light from the extension's glass wall to spread into the interior.

A wall in the hallway, after being stripped of its drywall, was left exposed on one side to reveal the wood framing. It now holds a metal and glass pocket door to the office.

The new dining area, just off the kitchen, was designed around a lamp that Peter brought back from Japan.

The new kitchen, part of the reconstructed extension, takes advantage of ample glass.

After spending several years in Tokyo, a family revamps an American Foursquare with a fresh floor plan, a glassy extension, and an appreciation of Japanese design.