The prime minister, dressed in a tailcoat, then led the guests in three banzai cheers, wishing longevity for the emperor.
In the evening, the couple welcomed guests at a court banquet held for the attendees of the enthronement ceremony.
Security was tightened, with up to 26,000 police officers mobilized from across Japan for the enthronement ceremony.
The ritual followed the style of former Emperor Akihito's enthronement ceremony in 1990, as well as that of Emperor Hirohito, posthumously known as Emperor Showa, held in 1928 in Kyoto, where the successive emperors had lived until the late 19th century.
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