when he ordered the Lord Keeper of the Privy Seal of Japan to protect them "at all costs". Role Since 690, the presentation of these items to the Emperor by the priests at the shrine has been a central element of the enthronement ceremony. This ceremony is not public, and these items are by tradition seen only by the Emperor and certain priests. While their actual locations are not confirmed, it is commonly thought that the sword is located at the Atsuta Shrine in Nagoya, the jewel is located at the Three Palace Sanctuaries in Kōkyo (the Imperial Palace in Tokyo), and the mirror is located at the Ise Grand Shrine in Mie Prefecture. Their first post-World War II enthronement appearance occurred during the accession and enthronement of Akihito in 1989 and 1990. Aside from their presence during the abdication of Akihito on 30 April 2019, their latest appearance occurred during the enthronement of Emperor Naruhito. He formally took possession of the regalia in a brief ceremony on 1 May 2019. The items themselves were never revealed during these public occasions as they remained shrouded from view in packages or boxes. When these items are not being used for their ceremonial purpose, their supposed locations are kept off limits to the public. Mikael Adolphson a professor at Cambridge University stated that this hidden strategy "adds mystique, and thus, authority, to the objects." He went on to say that Shinto religious tradition is "especially protective" of its symbols. There is a general reluctance in Japan to allow a historical analysis of the regalia as such an assessment could potentially "de-mythologize" the items. Scholars consider the imperial regalia to represent the fusion of Japan's ancient indigenous groups with new arrivals. The three treasures are a symbol that the emperor should unite the ethnic groups without discrimination. Cultural references The phrase "Three Sacred Treasures" is retrospectively applied to durable goods of modern Japan. During a policy address in 2003, then-Prime Minister Junichiro Koizumi said that during the mid-1950s and mid-1960s, the "three sacred treasures" for durable goods were the washing machine, refrigerator, and the black and white television, and the automobile, air conditioner, and color television set from the mid-1960s to the mid-1970s. Alvin and Heidi Toffler's Powershift use them to symbolize the three kinds of power they distinguish: force (sword), wealth (jewel) and knowledge (mirror). In Pretty Soldier Sailor Moon, a popular