Kongō Gumi, Construction company in Osaka, Japan
Kongō Gumi is a construction business in Osaka focused on designing, building, restoring, and repairing Japanese shrines, temples, castles, and heritage structures nationwide. The firm works mainly with timber and uses precise joinery techniques that evolved over centuries and rely on interlocking wooden connections rather than metal fixings.
Korean carpenter Kongo Shiko established the business in 578 at the request of Prince Shotoku to build the Shitenno-ji Buddhist temple in Osaka. Control remained within the same family for nearly 1400 years until financial difficulties following the economic downturn in the 1990s led to acquisition by Takamatsu Construction Group in 2006.
The firm's name comes from founder Kongo Shiko and has persisted across nearly fifteen centuries, even though leadership passed through adoption rather than bloodline several times. Traditional joinery skills that allow Japanese timber frames to stand without nails or modern fasteners continue to move from one generation to the next within the workshop.
Visitors cannot enter the workshops without prior arrangement, but several completed temples and shrines across Japan remain open to the public and showcase the firm's work. Those wanting to learn more about the techniques often find information panels at restored temples explaining details of the timber craft used.
A long scroll from the 17th century lists forty generations of leadership and traces each succession through adoption or marriage. Computer-aided design tools now complement the handcraft methods, allowing new components to fit seamlessly into centuries-old structures.
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