National treasures of Japan

A National Treasure (: kokuhō) is the most precious of Japan's Tangible Cultural Properties, as determined and designated by the Agency for Cultural Affairs (a subsidiary of the Ministry of Education, Culture, Sports, Science and Technology). A Tangible Cultural Property is considered to be of historic or artistic value, classified either as "buildings and structures" or as "fine arts and crafts." Each National Treasure must show outstanding workmanship, a high value for world cultural history, or exceptional value for scholarship.

Approximately 20% of the National Treasures are structures such as castles, Buddhist temples, Shinto shrines, or residences. The other 80% are paintings; scrolls; sutras; works of calligraphy; sculptures of wood, bronze, lacquer or stone; crafts such as pottery and lacquerware carvings; metalworks; swords and textiles; and archaeological and historical artifacts. The items span the period of ancient to early modern Japan before the Meiji period, including pieces of the world's oldest pottery from the Jōmon period and 19th-century documents and writings. The designation of the Akasaka Palace in 2009 and of the Tomioka Silk Mill in 2014 added two modern, post-Meiji Restoration, National Treasures.

Japan has a comprehensive network of legislation for protecting, preserving, and classifying its cultural patrimony. The regard for physical and intangible properties and their protection is typical of Japanese preservation and restoration practices. Methods of protecting designated National Treasures include restrictions on alterations, transfer, and export, as well as financial support in the form of grants and tax reduction. The Agency for Cultural Affairs provides owners with advice on restoration, administration, and public display of the properties. These efforts are supplemented by laws that protect the built environment of designated structures and the necessary techniques for restoration of works.

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