|Parent house||Kudō clan|
|Ruled until||1868 (Abolition of the han system)|
|Cadet branches||Okada Itō|
Itō Suketoki (the son of Kudō Suketsune), was famous for his involvement in the incident involving the Soga brothers. The family became a moderate power both in influence and ability by the latter Sengoku period of Feudal Japan.
After the death of Sukeie in 1181, Sukechika inherited Kawazu Domain in Izu Province. When his uncle Suketsugu neared death, he made Sukechika the guardian of his son Suketsune, who became the head of the Itō Domain in Izu.
- Yoshisuke, who was the descendant of Suketsune, inherited Agata Domain in Hyūga Province in 1584
- Suketaka (1541–1600), who was the son of Yoshisuke, supported Toyotomi Hideyoshi after the death of Oda Nobunaga; and he was granted land in Kawachi Province. After the Kyushu Campaign in 1587, the lands were merged into Hyuga Province and Obi Domain (50,000 koku)
- Sukeyoshi (1588–1636), who was the son of Suketaka, fought at the Battle of Sekigahara. His descendants remaining at Obi until the Meiji Restoration.
- A cadet branch of the clan were heads of Okada Domain (10,000 koku) in Bitchū Province from 1615 until 1868
The Itō family's most serious rivals in this period were the Shimazu. The Shimazu clan, which had unified Satsuma Province and Ōsumi Province under their control, began to clash with the Itō in 1570. The Itō were finally defeated by the Shimazu in 1578. Yoshisuke, the family head, went to Kyoto by way of Iyo Province, and sought help from Toyotomi Hideyoshi. The family's old lands were restored in 1587, following Toyotomi Hideyoshi's invasion of Kyushu and defeat of the Shimazu clan. By the Edo period, the Itō retained their holdings, which came to be known as the Obi Domain.
- Papinot, Jacques Edmond Joseph. (1906). Dictionnaire d’histoire et de géographie du Japon; Papinot, (2003). "Itō" at Nobiliare du Japon, p. 17 [PDF 21 of 80]; retrieved 2013-4-30.
- "Itō-shi" on Harimaya.com; Thomas Cogan, Introduction to The Tale of the Soga Brothers, xiv.
- "Itō-shi" on Harimaya.com
- "Itō-shi" on Mumei bushō retsuden
- "Obi" at Edo 300 (in Japanese)