Two Sails Casa by Yukihiro Nakagawa is a highly esteemed winner of the very prestigious 2026 A' Design Award de Hierro in Diseño de Arquitectura, Edificación y Estructuras Competition Category.

HierroArquitectura· 2026

Two Sails Casa

by Yukihiro Nakagawa

Client: MASTER CRAFT Co.Ltd

A' Design Award de Hierro Winner in Arquitectura Category

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Verified Award Winner

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The Design

About Two Sails Casa

Two Sails es una casa junto al mar diseñada para una familia de dos generaciones. El edificio de madera de dos plantas se encuentra en Okayama, Japón, con una superficie construida de 250 metros cuadrados en una parcela de 800 metros cuadrados. La forma de la cubierta evoca la vela de un barco y ayuda a introducir la luz natural y la brisa marina en el interior. Los espacios habitables se dividen en zonas norte y sur, de modo que cada generación conserva su propia privacidad. Un corredor techado une ambas zonas y permite el desplazamiento incluso en días de lluvia. Los muros exteriores están revestidos con un metal resistente que soporta la corrosión provocada por el aire marino.

The Recognition

About the A' Design Award de Hierro

Two Sails Casa ha ganado el A' Design Award de Hierro, un reconocimiento prestigioso concedido a buenos diseños que cumplen los requisitos profesionales e industriales que se esperan de creaciones bien diseñadas. Los ganadores de Hierro demuestran gran habilidad, alta especialización, comprensión experta y capacidad creativa de sus creadores. Se espera que Two Sails Casa sea una creación muy apreciada, admirada y querida, práctica e innovadora. Este diseño ganador del A' Design Award de Hierro integra las mejores prácticas del sector y tiene características técnicas competentes unidas a conocimiento práctico y talento. Two Sails Casa es respetado por su minuciosidad y está concebido para aportar mejoras en la calidad de vida que ayudan a hacer del mundo un lugar mejor.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: This project is a seaside residence designed for a two generation family accommodating both parents and children.The design takes advantage of the coastal location to introduce natural light and sea breezes creating an open and comfortable living environment.Careful attention is given to zoning and circulation to respect the daily rhythms and privacy of each generation while also allowing for shared family experiences.
Dimensions & Packaging: Land area 800 square meters
Building area 250 square meters
Tags: House, Architects, Building, Japan, Sail
Production Technology: Two story wooden building
Design Challenge: The exterior walls are clad in durable metal materials that withstand the corrosive effects of sea breezes ensuring that the building maintains its striking appearance even in harsh coastal conditions.
Research: The residence is designed so that a two generation family can live with a comfortable sense of distance with the living spaces divided into northern and southern zones. A roofed corridor is provided to ensure seamless circulation between the areas allowing movement even on rainy days.
Inspiration: This house located near the sea is a two family residence characterized by a roof form reminiscent of a ship sail.The sail like roof gently captures the sea breeze and soft natural light creating a comfortable living environment throughout the home.The design allows the two households to respect each lifestyle while remaining gently connected creating a living environment that harmonizes with the surrounding natural landscape.
Project Duration: Built in Okayama, Japan in 2025
Operation Flow: It is designed to symbolize two vessels sailing side by side representing the hope that the family can live together harmoniously for generations.
Image Credits: Photographer Senichiro Nogami