Yukimura Sanada was born to a lord who owned a small piece of land in Shinsu (present day Nagano Prefecture). He survived using wisdom, courage and much effort during the Sengoku period. Eventually, he grew into a much respected samurai warrior.

During The Siege of Osaka, Yukimura Sanada constructed the small fortress "Sanada-maru" on the periphery of Osaka Castle. His fortress successfully repelled the much larger invading forces of Tokugawa Ieyasu.