The Era of Surging 40-Year-Old Condominiums: "Demolish or Revitalize?" - Yashima Kogyo Publishes Practical Guide for 100-Year Sustainable Living

Yashima Kogyo Co., Ltd. (Head office: Nakano-ku, Tokyo; President and Representative Director: Mizuki Nishimatsu; hereinafter, "the Company"), which handles repair work for condominiums and buildings, is pleased to announce the publication of its book "How to Nurture Beloved Condominiums: The Shin-Mansion 100-Year Plan" (published by Kindai Sales Co., Ltd.), focusing on extending the lifespan of condominiums and maintaining their asset value. In Japan, the number of condominiums over 40 years old is rapidly increasing, and this number is expected to grow further in the future. However, rebuilding presents high hurdles such as significant costs and reaching consensus among residents, with only a very limited number of cases actually being realized. Against this backdrop, this book proposes a paradigm shift from "demolishing and rebuilding" to "continuing to use" and provides practical guidelines for maintaining condominiums for 100 years and continuously enhancing their value. ## The Reality of Aging Condominiums and the Impossibility of Rebuilding Condominiums supplied since Japan's period of rapid economic growth are now universally aging, and their deterioration has become a nationwide issue. In particular, the number of condominiums over 40 years old is expected to increase rapidly in the future, and complex issues such as repair, maintenance, and consensus-building are becoming apparent. However, in reality, factors such as soaring construction costs, insufficient repair reserve funds, an aging resident population, and the difficulty of reaching a consensus of four-fifths or more make "rebuilding" an extremely limited option. As of the end of 2024, there are approximately 1.48 million condominiums over 40 years old, and this number is projected to reach approximately 3.3 times that by 2044. Furthermore, in recent years, there has been a demand for a shift towards utilizing existing stock from the perspective of reducing environmental impact. Trends in the Number of Condominium Stocks (as of the end of 2024 (Reiwa 6)) (PDF format) PDF format (updated August 5, 2025 (Reiwa 7))