the house of prince hitachi is a princely house in direct descent from emperor showa . 昭和天皇所生の直宮家。
the house of prince mikasa is a princely house in direct descent from emperor taisho . 大正天皇所生の直宮家。
the house of prince akishino is the premier princely house in direct descent from the current emperor . 今上天皇所生の直宮家、筆頭宮家。
he was born as the second son of saneyori who was a direct descent of the northern house of the fujiwara clan (the ononomiya family ). 藤原北家の嫡流(小野宮家)である実頼の次男として生まれる。
he was a direct descent of ' the keicho family ,' the main lineage of hosokawa clan which was prosperous during the muromachi period . 室町時代に栄えた細川氏の本流である「京兆家」の直系子孫。