Sogō Masayasu

Sogō Masayasu (十河存保; 1554 – 1587) was a Japanese samurai of the Sengoku period. He was second son of Miyoshi Yoshikata who was adopted by Sogō Kazumasa from the Sogō clan.^[1]

Sogō Masayasu
十河 存保
Lord of Shōzui Castle
In office 1562–1587
Preceded by	Miyoshi Yoshikata
Personal details
Born	1554 Shōzui Castle
Died	20 January 1587(1587-01-20) (aged 32–33) Battle of Hetsugigawa, Bungo Province
Relations	Miyoshi Yoshikata (father) Sogō Kazumasa (adoptive father)
Military service
Allegiance	Miyoshi clan Toyotomi clan
Rank	Daimyo
Unit	Sogō clan
Commands	Shōzui Castle
Battles/wars	Battle of Nakatomigawa (1582) Invasion of Shikoku (1585) Battle of Hetsugigawa (1587)

In this Japanese name, the surname is Sogō.

In 1582, Masayasu was defeated by Chōsokabe Motochika`s large army during the battle of Nakatomigawa, abandoned Shōzui Castle and asked Toyotomi Hideyoshi for help.^{[2] [3]}

In 1585, he participated in Hideyoshi's successful campaign in Shikoku against Chosokabe clan.

In 1587, He died during the Kyushu campaign against the Shimazu clan as a result of Sengoku Hidehisa`s reckless actions at the battle of Hetsugigawa.^[4]