Majestic Zuigan-ji Temple in northeast Japan is a national cultural treasure. Completed 400 years ago by the feudal lord of the region, Date Masamune, it’s famous as a lavish and glorious example of the culture of the Azuchi-Momoyama period (mid-1500s to 1600). The main hall is decorated with beautiful period-style art created by painters and master craftsmen summoned from Kyoto. With ground subsidence now causing its pillars to tilt, Zuigan-ji has been undergoing comprehensive repairs and restorations since 2009, called "the great Heisei restoration." An essential consideration when repairing Japanese cultural properties is that old and weathered parts must not be replaced and existing original materials must be reused to the greatest possible extent. The restoration's greatest challenge was to reinforce the structure to protect against earthquakes. This program follows the Japanese engineers and craftsmen, striving to clear the hurdle with their conviction and ideas, to preserve the national treasure.