The Sakai clan (酒井氏, Sakai-shi^?) was a Japanese clan branching off from the Matsudaira clan. Due to this fact, the Sakai served the Matsudaira as senior vassals throughout the Sengoku Period. The Sakai soon on became chief retainers under Tokugawa Ieyasu, and split into many different branches in the subsequent decades. The Matsudaira clan ) is a Japanese clan that originated in and took its name from Matsudaira county, in the old Mikawa province. ... “Sengoku” redirects here. ... Shogun Tokugawa Ieyasu The Tokugawa clan crest This is a Japanese name; the family name is Tokugawa Tokugawa Ieyasu (previously spelled Iyeyasu) January 31, 1543 – June 1, 1616) was the founder and first shogun of the Tokugawa shogunate of Japan which ruled from the Battle of Sekigahara in 1600 until...

The Sakai of Shonai han (Dewa Province, 170,000 koku) were prominent in the late Edo period as a military power. Charged with the safety of Edo, they were patrons of the Shinchogumi police force, and were very effective in their duties. Following the surrender of Edo, the Sakai withdrew and returned north to their domain, where they were active in the northern theater of the Boshin War, as well as becoming signatories to the pact that created the Ouetsu Reppan Domei in 1868. Combatants Imperial faction: Satsuma, Chōshū, Tosa Tokugawa Shogunate Commanders Ruler: Meiji Emperor, CIC: Saigō Takamori, Army: Kuroda Kiyotaka Shogunate: Ruler: Tokugawa Yoshinobu, Army: Katsu Kaishu, Navy: Enomoto Takeaki, Ezo Republic: President:Enomoto Takeaki, CIC: Otori Keisuke, Navy: Arai Ikunosuke Casualties ~1,000 killed ~2,000 killed Campaign map of... Troops from Sendai, following their mobilization in April, joined the Northern Alliance against Imperial troops in May 1868. ...