What architect built this house and who lives here? Before entering the narrowest house, no one had an idea that it looked so amazing from the inside! See its interior in the comments!

At first glance, this ultra-slim house in Japan seems too small to live in. Wedged between a river and road on a triangular lot, it looks more like a sculpture than a home.

But inside, it’s a masterclass in smart design.

Created by Mizuishi Architects Atelier, the 594-square-foot house uses every inch wisely. The ground floor holds a cozy bedroom, while the upper floor features an airy living room and kitchen, full of natural light and high ceilings.

A loft above adds even more function, serving as a playroom or retreat.

Though compact, the space feels open, stylish, and serene—a perfect example of how thoughtful architecture can turn limitations into beautiful living.