Hōjō clan or Go-Hōjō clan; descended from Kanmu Heishi; no direct relation to the regent Hōjō clan (北条氏) or Kitajō clan (北条氏). Honma clan (本間氏) – also known as Homma clan or Honma clan of Sado; cadet branch of Yokoyama clan who descended from Ono no Takamura (disputed). Honma clan of Sakata (酒田本間氏) – cadet branch. Honda clan (本多氏) – descended from Fujiwara Hokke; famous for Honda Tadakatsu. Hosokawa clan (細川氏) – cadet branch of Ashikaga clan who descended from Seiwa Genji. Hosokawa Keichō family (細川京兆家) – head family. Hosokawa Tenkyū family (細川典厩家) – cadet branch. Hosokawa family of Awa (阿波細川氏) – cadet branch; descended from Hosokawa Akiharu. Hosokawa family of Ōshū (奥州細川家) – cadet branch; descended from Hosokawa Akiuji. Hotta clan (堀田氏) descended from Emperor Kōgen, by the Minister Takeshi-uchi no Sukune. Ichijō family (一条家) – descended from Fujiwara Hokke. Ichijō clan of Tosa (土佐一条氏) – cadet branch of Ichijō family who descended from Fujiwara Hokke. Ide clan (井出氏) – cadet branch of Nikaidō clan who descended from Fujiwara Nanke. Ii clan (井伊氏) – descended from Fujiwara Hokke; famous for Ii Naotora, Ii Naomasa and Ii Naosuke. Ikeda clan (池田氏) – descended from Seiwa Genji; no direct relation to other clans called Ikeda. Ikeda clan of Iyo (伊予池田氏) – no direct relation to other clans called Ikeda. Ikeda clan of Mino (美濃池田氏) – no direct relation to other clans called Ikeda. Ikeda clan of Sasaki (池田氏) – cadet branch of Sasaki clan; no direct relation to other clans called Ikeda. Ikeda clan of Settsu (摂津池田氏) – descended from Ki clan (disputed). no direct relation to other clans called Ikeda. Imagawa clan (今川氏) – cadet branch of Ashikaga clan who descended from Seiwa Genji; famous for Imagawa Yoshimoto. Inaba clan – cadet branch of Kōno clan who descended from Prince Iyo, son of Emperor Kanmu. Inoue clan (井上氏) – descended from Seiwa Genji. Inoue clan of Shinano (信濃井上氏) – head family. Inoue clan of Aki (安芸井上氏) – cadet branch. Inoue clan of Mikawa (三河井上氏) – cadet branch. Ishida clan (石田氏) – cadet branch of Miura clan who descended from Kanmu Heishi (disputed). famous for Ishida Mitsunari Ishikawa clan (石川氏) – also known as Ishikawa Genji; descended from Seiwa Genji. Ishimaki clan (石巻氏) – descended from Nanke. Itō clan (伊東氏) – cadet branch of Kudō clan who descended from Nanke. Kamiizumi clan (上泉氏) – cadet branch of Fujiwara-descent Ashikaga clan who