Everything about Sakakibara Yasumasa totally explained
(
1548-
June 19,
1606) was a Japanese
daimyo of the late
Sengoku period through early
Edo period, who served the
Tokugawa clan. As one of the Tokugawa family's foremost military commanders, he was considered one of its
"Four Guardian Kings" (
shitennō 四天王). His court title was
Shikibu-dayū (式部大輔).
Background
Sakakibara Yasumasa was born in Tenmon 17 (1548), the 2nd son of
Sakakibara Nagamasa, in the Ueno district of
Mikawa Province. The Sakakibara were hereditary retainers of the Matsudaira (later Tokugawa) clan, being classified as
fudai. However, they didn't serve the clan directly, but instead served one of its senior retainers, which at that time was
Sakai Tadanao (which classified the Sakakibara as
baishin, or "rear vassals"). The young Yasumasa interacted with Matsudaira Motoyasu (later Tokugawa Ieyasu) often from a young age, and was soon appointed his page. Due to his valor in the suppression of the
Ikko Ikki uprising in Mikawa, he was allowed to use the "yasu" from Ieyasu's name.
At this time, he unseated his brother and became head of the Sakakibara clan. There are two explanations for this. One is that his brother had been an ally of the Ikko Ikki rebels, and the other is that his brother was a retainer of Ieyasu's son
Nobuyasu, who was implicated in what was most probably a fraudulent
treason plot against
Oda Nobunaga.
Adulthood and Service as One of the 'Four Guardians'
In Eiroku 9 (1566), at age 19, Yasumasa had his coming-of-age ritual, and soon after, he and
Honda Tadakatsu were made
hatamoto by Ieyasu, and each granted command of 50 cavalrymen. From that point on, they'd function as Ieyasu's
hatamoto unit commanders.
Yasumasa battled at
Anegawa during the year of
1570, The
Mikatagahara during the year of
1573, along with the
Nagashino during the year of
1575. When the latter chose to defy
Toyotomi Hideyoshi, Yasumasa still served strongly under Ieyasu, suggesting the region of
Komaki, suited for the currently ensueing campaign. Yasumasa was given the title of "
Shikibu-taiyu", when accompaining Ieyasu to
Osaka to meet with Hideyoshi. After the Tokugawa moved to the region of
Kantō, he was to have a team responsible for the allocation of fiefs. While Ieyasu was serving as one of
Hideyoshi's Korean Invasion staff in the region of
Kyūshū, Yasumasa was to supervise Kantō, as one of the chief administrators.
Later life
Yasumasa received the 100,000 koku fief of
Tatebayashi han following the Tokugawa victory at the
Battle of Sekigahara, which remained in the family for a few generations. Yasumasa himself died in 1606, at the age of 59, and is buried at
Zendoji Temple in Tatebayashi, where his grave still stands.
Further Information
Get more info on 'Sakakibara Yasumasa'.
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