These shrines are rebuilt every 20 years, in accordance with Shinto tradition. To begin a new generational cycle, exact replicas of the previous halls are erected with new wood, using the same centuries-old methods, on adjacent sites. The old buildings are then dismantled. The main halls you see now—the 62nd set—were completed in 2013 at an estimated cost of more than ¥5.5 billion.
For the Japanese, importance is found in the form of the buildings; the vintage of the materials is of little concern. You cannot enter any of the buildings, but the tantalizing glimpses of the main halls that you catch while walking the grounds add to the mystique of the site. Both Grand Shrines exhibit a natural harmony that the more-contrived buildings in later Japanese architecture do not.