Sakai Tadakatsu (Shōnai)
was a Sengoku period samurai and early Edo period daimyō under the Tokugawa shogunate of Japan. His courtesy title was Kunai-no-taifu. Biography Sakai Tadakatsu was the sixth son of Sakai Ietsugu, castellan of Yoshida Castle and son of Sakai Tadatsugu (1527–1596), who was a vassal of Tokugawa Ieyasu. Tadakatsu's childhood name was Kogōrō, and when he underwent his genpuku ceremony, he was awarded a kanji from the name of Shōgun Tokugawa Hidetada as a special mark of favor, becoming "Tadakatsu".<ref>Plutschow, Herbert. (1995). [https://books.google.com/books?id=fNQjDQ-mWYgC&q=sakai+tadayuki&pg=PA53 "Japan's Name Culture: The Significance of Names in a Religious, Political and Social Context, p.53.]</ref> He became daimyō of Takada Domain in Echigo Province (100,000 koku) on the death of his father in 1618. However, only one year later, he was transferred to Matsushiro Domain in Shinano Province by order of the shogunate, with the same nominal kokudaka. Three years later, in 1622, when the shogunate dispossessed the Mogami clan, Tadakatsu was transferred again, to become daimyō of Shōnai Domain. At that time, his kokudaka was increased to 138,000 koku. One of his first actions on becoming daimyō of Shōnai was to begin the construction of Tsuruoka Castle as a replacement for the dilapidated Kamegasaki Castle. However,