# HYAN renovates 1970s Japanese home around 'single, continuous' living space Timber, plaster and tiles create a modern open-plan living environment. - **Source:** [Architecture news and projects | Dezeen](https://brifing.si/source/50c21201-9cc6-48e0-8a7c-6ea605af10c3) - **Published:** 2026-07-23 - **Topic:** [Design & UX](https://brifing.si/c/design) - **Original article:** - **On Brifing:** https://brifing.si/s/208a9a6c-20bb-4f6a-8717-b2115606bd14 ## Transformation of a 1970s home Architecture studio HYAN renovated a 1970s house in Hayama, south of Tokyo. The original wooden structural system was preserved and reinforced to meet modern seismic codes. This approach reflects a design philosophy that blends old and new elements harmoniously. ## Open-plan living concept On the ground floor, nearly all interior partitions were removed to create a unified living, dining and kitchen area. Spatial transitions are defined by changes in floor levels and ceiling heights. This design ensures fluidity while allowing natural light to permeate throughout the space. ## Material palette and textures Natural materials like wood, plaster and tiles were used throughout. Colored tiles and terrazzo details in the kitchen and bathroom respond to the play of light and shadow from large windows. Material choices highlight the structural system while adding warmth to the interiors. ## Spatial hierarchy and functionality The double-height main living area integrates with the kitchen and dining space. A slightly sunken lounge area features a daybed nook that can be enclosed with patterned curtains. The upper floor contains more private spaces like bedrooms and a study area. ## A home that evolves over time The architect-residents view this project not as a finished work but as a home that grows with daily life. The flexible design accommodates seasonal changes and evolving user needs, creating a dynamic living environment that adapts to its inhabitants. ## Continuity in Japanese architecture HYAN's project demonstrates how traditional and modern elements can coexist in Japanese architecture. The transformation of old structures without demolition sets an important example for sustainable design. The strong connection with nature reflects the essence of Japanese design philosophy. ## Sources covering this story - https://www.dezeen.com/2026/07/23/hyan-green-sandwich-house-renovation-japan/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._