In addition, the conferment of a court rank is called "Joi," and the ceremony held in the Imperial Court in which the Fifth Rank and above are granted is also called "Joi" after the Heian period. (It is held on around January 5.).
なお、位階に叙すことを叙位（じょい）と言い、平安時代以後は、宮中で五位以上の位階を授ける儀式（正月五日頃に行われる。）のことも叙位と言った。