Sakakibara clan

Sakakibara clan 榊原氏
Home province	Ise Kozuke Mutsu Harima Echigo
Parent house	Nikki clan (Seiwa Genji)
Titles	Daimyo Viscount
Founder	Sakakibara Toshinaga
Founding year	16th century
Dissolution	still exant

The Sakakibara clan (榊原氏, Sakakibara-shi) are a daimyō branch of the samurai Minamoto clan in Edo period Japan.

In the Edo period, the Sakakibara were identified as one of the fudai or insider daimyō clans which were hereditary vassals or allies of the Tokugawa clan, in contrast with the tozama or outsider clans. The Sakakibara were one of the four families who enjoyed the privilege of providing a regent during the minority of a Shogun.

The fudai Sakakibara clan originated in the 16th century. Their elevation in status dates from 1586.

The family was descended from Nikki Sadanaga of the Seiwa Genji branch of the Minamoto clan. The first to take the name Sakakibara was Sadanaga's son, who resided in Sakakibara in Ise Province. He took the name Sakakibara Toshinaga.

Sakakibara Yasumasa (1548–1606) was an ally of Tokugawa Ieyasu in the Sengoku period. After the Battle of Sekigahara, he was granted a special honor; and the name by which he is known today dates from that time. He was granted the right to use one of Ieyasu's name characters — Yasumasa. Along with Sakai Tadatsugu, Ii Naomasa and Honda Tadakatsu, he was known as one of the "four heavenly kings of the Tokugawa" (Tokygawa shi-tennō). The sobriquet described four men who were each famously known for their loyal support for the Tokugawa clan.

Yasumasa was granted the han (fief) of Tatebayashi (100,000 koku) in Kozuke Province. Yasumasa's sons would fight with the Tokugawa in the Siege of Osaka.

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