, sometimes called Ichijō Uchimasa, lived during the

Sengoku Period The was the period in History of Japan, Japanese history in which civil wars and social upheavals took place almost continuously in the 15th and 16th centuries. The Kyōtoku incident (1454), Ōnin War (1467), or (1493) are generally chosen as th ...

of the 16th century in Japan. His father Ichijo Kanesada went into exile in 1570. At some point between June 1573 and May 1575, Ichijō Tadamasa traveled to Tosa to meet with

Chōsokabe Motochika was a prominent ''daimyō'' in Japanese Sengoku period, Sengoku-period. He was the 21st chief of the Chōsokabe clan of Tosa Province (present-day Kōchi Prefecture), the ruler of Shikoku, Shikoku region. Early life and rise He was the son and ...

head of the

Chōsokabe clan , also known as , was a Japanese samurai kin group. Over time, they were known for serving the Hosokawa clan, then the Miyoshi clan and then the Ichijō clan. Papinot, Jacques Edmond Joseph. (1906). ''Dictionnaire d’histoire et de géogra ...

. Tadamasa became governor of Tosa after marrying Motochika's daughter. Following his involvement in a plot against his father-in-law led by Hakawa Genba and others, he was exiled himself. His son Masachika was the last member of the Ichijō clan of Tosa.

References

1560 births 1580 deaths Samurai {{Samurai-stub