Terms on enthronement, investiture of the Crown Prince and coming-of-age

Kyutyu-kyoen-no-gi
Banquet to announce and celebrate Accession to the Throne, Investiture as Crown Prince, marriage, and other such events
Court Banquets
Banquet to announce and celebrate Accession to the Throne, Investiture as Crown Prince, marriage, and other such events
The Privy Seal
The Privy Seal with Tenno Gyoji engraved on it. The seal is used to attest the promulgation documents of Imperial Edicts, laws, cabinet orders and treaties, instruments of ratification of pacts, full powers and credentials of ambassadors and ministers, and appointment and dismissal notices of Ninshokan (officials whose appointment and dismissal requires Imperial acknowledgement).
Kenji (the Imperial Regalia)
The sacred sword and jewels
Kenji-to-Shokei-no-gi
Accession Ceremony to inherit the Imperial Regalia, the Privy Seal and the State Seal as evidence of the emperor's status
Traditional properties as are to be handed down with the Throne
The traditional properties as are to be handed down with the Throne includes the Three Sacred Treasures (the sacred mirror, the sacred sword and the sacred jewel) and the Imperial Palace Sanctuaries (Kashikodokoro, Koureiden, and Shinden) (Designated by the Imperial House Economy Law, Article 7).
the Imperial Heir
The member of the Imperial Family to next ascend the throne
Kozokuhu (the Record of Imperial Lineage)
Book that records facts pertaining to the Imperial status of Imperial Family members other than those of His Majesty the Emperor, Her Majesty the Empress, and the Empress Dowager
Kotohu (the Record of Imperial Lineage)
Books that record facts pertaining to His Majesty the Emperor and the Imperial Family. These are equivalent to the official family register. The books consist of Daitofu and Kozokuhu (Designated by the Imperial House Law, Article 26).
the State Seal
The State Seal with Dai Nippon Kokuji engraved on it. The State Seal is used for certificate of decoration.
Shukuga-Onretsu-no-gi (Imperial Procession by motorcar after the Enthronement Ceremony)
The ceremony is held after the Enthronement ceremony for announcing to the general public the accession to the throne and to receive congratulations.
Coming-of-age
The majority age for the Emperor, the Kotaishi (Crown Prince, son of the Emperor) and the Kotaison (Crown Prince, grandson of the Emperor) is eighteen, while the age for other Imperial Family members is twenty (Designated by the Imperial House Law, Article 22, and the Civil Code, Article 3).
Coming of Age Ceremony
Ceremony held when a member of the Imperial Family reaches the coming-of-age
Accession to the Throne
The Crown Prince's accession to the throne (Designated by the Imperial House Law, Article 4)
Sokui-go-Choken-no-gi (His Majesty's First Audience Ceremony after the Accession)
Ceremony where His Majesty the Emperor officially meets the representatives of the people for the first time after the accession to the throne. The representatives include the Speaker of the House of Representatives and President of the House of Councilors (legislative), Prime Minister (executive) and Chief Justice of the Supreme Court (judicial).
Ceremony of the Accession to the Throne
Ceremony to announce the accession to the throne. This is considered as an act in matters of state designated by the Constitution, and consists of Kenji-to-Shokei-no-gi (Accession Ceremony to inherit the Imperial Regalia and the State and Privy Seals), Sokui-go-Choken-no-gi (His Majesty's First Audience Ceremony after the Accession with the Head of the Legislature, Executive, and Judiciary and other Representatives of the people), Sokuirei-Seiden-no-gi (Enthronement Ceremony), Shukuga-Onretsu-no-gi (Imperial Procession by motorcar after the Enthronement Ceremony) and Kyoen-no-gi (Court Banquets) (Designated by the Imperial House Law, Article 24).
Sokuirei-Seiden-no-gi (Enthronement Ceremony)
Ceremony where His Majesty the Emperor declares his enthronement, and then representatives from home and abroad offer congratulations for His Majesty's enthronement.
Daikyo-no-gi
Grand banquet after the Daijokyu-no-gi, in which the Emperor bestows white sake, black sake and a relish upon those present, and all partake together.
Daijokyu-no-gi
Ceremony after the enthronement, in which the Emperor offers new rice to the Imperial Ancestor and to the Tenjin Chigi (the deities of heaven and earth) at both the Yukiden and Sukiden at the Daijokyu (temporary hall for the Daijosai), and partakes of it
The Daijosai (Rite of Offering of New Rice after the Enthronement Ceremony)
Rite where His Majesty offers new rice to the ancestors and to the gods of heaven and earth. His Majesty eats to appreciate and pray for public peace and productiveness of grain for the state and the people. (The term Daijosai is used for the term that means the main rite itself and as the collective term for the series of rites held before and after the main rite.)
Daitohu (the Record of Imperial Lineage)
Book that records facts pertaining to the Imperial status of His Majesty the Emperor, Her Majesty the Empress and the Empress Dowager
The Takamikura (Throne of His Majesty the Emperor)
Throne that His Majesty the Emperor uses during Sokui-no-Rei (Ceremony of the Accession to the Throne)
Choken-no-gi
Audience with Their Majesties the Emperor and Empress, held at the times of investiture of the Crown Prince, wedding, and other such events
The Michodai (August Seat of the Empress)
Throne that Her Majesty the Empress uses during Sokui-no-rei (Ceremony of the Accession to the Throne)
Rittaisi-Senmei-no-gi
The ceremony for announcing that a new Crown Prince has been crowned and for representatives from home and abroad to celebrate the event
Investiture as Crown Prince (Rittaishi no Rei)
Ceremony where a new Crown Prince announces his investiture