There are In, Den, Miya, Dai, Tei and Taku in the last word of the aristocracy residential name in Heian Period. On Hyakurensyo, how to use of these is as follows:
1. In and Den are used as the residential name of the Emperor and the retired Emperor. Den is used as that name of the women in the Emperor family, also. Miya on record is few. However, that is used as that of the women in the Emperor family and the aristocrats.
2. Dai, Tei and Taku are used as the aristocracy residential name. Taku is used as that of people except the Emperor family and the aristocrats, also
3. In, Dai and Taku are continually recorded in Hyakurensyo. Den and Tei are recorded in the latter half of that.
