Enthronement is an ancient ceremony that marks the accession of a new emperor to Japan's Chrysanthemum Throne, the world's oldest continuous hereditary monarchy. Various ancient imperial regalia (three sacred treasures) are given to the new sovereign during the course of the rite. It is the most important out of the Japanese Imperial Rituals.
The enthronement ceremony consist of five sub-ceremonies, which are conducted as constitutional functions (国事行為) based on Article 3 of the Constitution of Japan as follows:
Presentation of the Three Sacred Treasures
The first is the simplest, Kenji-tō-Shōkei-no-gi (剣璽等承継の儀), it takes place immediately after the death or abdication of the preceding sovereign. The successor is formally presented with boxes containing two of the three items that compose the Imperial Regalia of Japan: (1) a replica sword representing the sword Kusanagi-no-Tsurugi (lit. "Grasscutter Sword") (草薙劍), though the original is a