was a Japanese

samurai were the hereditary military nobility and officer caste of History of Japan#Medieval Japan (1185–1573/1600), medieval and Edo period, early-modern Japan from the late 12th century until their abolition in 1876. They were the well-paid retai ...

of the

Sengoku period The was a period in Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the feudal system of Japan under the Ashikaga shogunate. Variou ...

. He was second son of Miyoshi Yoshikata who was adopted by Sogō Kazumasa from the Sogō clan. In 1582, Masayasu was defeated by

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

`s large army during the

battle of Nakatomigawa The was fought on August 27 to August 28 of 1582 on Shikoku island between the Chōsokabe clan and the Miyoshi clan. History The armies met on the banks of the Nakatomigawa on August 27, with the Chōsokabe army of 23,000 men enjoying a clear ...

, abandoned Shōzui Castle and asked

Toyotomi Hideyoshi , otherwise known as and , was a Japanese samurai and '' daimyō'' ( feudal lord) of the late Sengoku period regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: Military Innovations that Changed the C ...

for help. In 1585, he participated in Hideyoshi's successful campaign in

Shikoku is the smallest of the four main islands of Japan. It is long and between wide. It has a population of 3.8 million (, 3.1%). It is south of Honshu and northeast of Kyushu. Shikoku's ancient names include ''Iyo-no-futana-shima'' (), ...

against Chosokabe clan. In 1587, He died during the Kyushu campaign against the

Shimazu clan The were the ''daimyō'' of the Satsuma han, which spread over Satsuma, Ōsumi and Hyūga provinces in Japan. The Shimazu were identified as one of the '' tozama'' or outsider ''daimyō'' familiesAppert, Georges ''et al.'' (1888). in cont ...

as a result of

Sengoku Hidehisa , childhood name Gonbei (権兵衛) was a samurai warrior of the Sengoku period and the Edo period. He was the head of the Komoro Domain in Shinano Province. Papinot, Jacques Edmond Joseph. (1906). ''Dictionnaire d'histoire et de géographie du J ...

`s reckless actions at the battle of Hetsugigawa.

References

Samurai 1554 births 1587 deaths Miyoshi clan Japanese warriors killed in battle People from Tokushima Prefecture {{Samurai-stub