Okazaki Castle, although not the same castle as was originally built, nor in the same place, nevertheless has a long history dating back to 1455, when it was built by warrior Saigo Tsugiyori. Recent research suggests that the original castle was built in the Myodaiji area of Okazaki, and was probably nothing more than a mere wooden fort. Matsudaira Kiyoyasu captured the castle in 1524, and in 1543 his grandson, Tokugawa Ieyasu, would be born there.