Tangible Cultural Properties of Japan in the context of "National Treasure (Japan)"

The National Treasure (国宝, kokuhō) refers to Tangible Cultural Properties designated by Japanese law as: “having exceptionally high value”. It applies to buildings, artworks, and crafts; selected from Important Tangible Cultural Properties by the Agency for Cultural Affairs (a special body of the Ministry of Education, Culture, Sports, Science and Technology). A Tangible Cultural Property is considered to be of historic or of artistic value, classified either as buildings and structures or as fine-arts and crafts. Each National Treasure must demonstrate outstanding workmanship, 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 remaining 80% include paintings, scrolls, sutras, calligraphy, sculptures in wood, bronze, lacquer or stone, as well as crafts such as pottery, lacquerware, metalworks, swords, textiles, and archaeological artifacts. The items span the period from 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, the Tomioka Silk Mill in 2014, and the Kaichi School added three modern, post-Meiji Restoration National Treasures.

A Cultural Property (文化財, bunkazai) is administered by the Japanese government's Agency for Cultural Affairs (Ministry of Education, Culture, Sports, Science and Technology), and includes tangible properties (structures and works of art or craft); intangible properties (performing arts and craft techniques); folk properties both tangible and intangible; monuments historic, scenic and natural; cultural landscapes; and groups of traditional buildings. Buried properties and conservation techniques are also protected. Together these cultural properties are to be preserved and utilized as the heritage of the Japanese people.

To protect Japan's cultural heritage, the Law for the Protection of Cultural Properties contains a "designation system" (指定制度) under which selected important items are designated as Cultural Properties, which imposes restrictions on the alteration, repair, and export of such designated objects. Designation can occur at a national (国指定文化財), prefectural (都道府県指定文化財) or municipal (市町村指定文化財) level. As of 1 February 2012, there were approximately 16,000 nationally designated, 21,000 prefecturally designated, and 86,000 municipally designated properties (one property may include more than one item). Besides the designation system there also exists a "registration system" (登録制度), which guarantees a lower level of protection and support.

In 1975 the Japanese government added a new chapter to the Law for the Protection of Cultural Properties (1950) to provide for "traditional techniques or craftsmanship that are indispensable to the preservation of cultural property and for which preservation measures shall be taken". Preservation techniques are selected in relation to both tangible and intangible cultural properties and a holder or preservation body is recognized for each technique.

In support of the Selected Conservation Techniques (選定保存技術), the government provides funding for and conducts programmes relating to documentation, training, development, promotion and public education. Recognition is thus made and measures taken to combat some of the most serious conservation issues, namely the lack of specialist craftsmen, the loss of knowledge of traditional techniques, and the availability of suitable tools and materials. These issues are of particular relevance in Japan due to the sophistication and inherent susceptibility of much of its art and architecture.