Japan housing trends: Breathing construction and vacant house renovation

Japan is facing a growing housing dilemma characterized by rising new construction costs and a record number of vacant houses. As of 2023, the number of vacant properties in Japan reached approximately 9 million, with projections suggesting that one in three houses could be vacant by 2038.

In response to these trends, new approaches to living are emerging. Nikken Construction Co., Ltd. in Toda City promotes the ‘WB method,’ a construction technique designed to allow houses to ‘breathe’ by using shape-memory alloys to regulate ventilation based on temperature and humidity. Their showroom allows residents to experience the difference in air quality provided by this technology.

Simultaneously, there is a growing interest in the renovation and reuse of existing properties. Authors Rie Ishikawa and Kyoko Kato, in their book ‘Living in a Vacant House,’ explore how individuals are navigating the challenges of inheriting and renovating old homes. While issues such as seismic retrofitting and high renovation costs remain significant hurdles, many are finding value in preserving family history and managing costs by transforming vacant properties into ideal living spaces.