First Juken is a residential real estate developer primarily engaged in the planning, construction, and sale of single-family detached homes (built-for-sale housing) and condominiums, operating mainly across the Kinki region, Aichi, Hiroshima, Fukuoka, Chiba, and Saitama prefectures. Its core detached housing business utilizes traditional Japanese timber-frame construction (zairai koho) to deliver standardized yet quality homes at competitive price points, targeting first-time homebuyers. The company also operates a condominium business covering new-build sales, renovation resales, and rental properties, as well as a specialty construction segment applying its timber-frame expertise to large-scale wooden buildings.