In the Star Army of Yamatai, Taisa 大佐 (sometimes Daisa) is the highest line officer rank. A Taisa is responsible for leading a large unit, such as a battleship or carrier, or for a group of smaller units such as a squadron of Plumeria Gunships. In order to become a Taisa, one must have a great deal of experience, including having previously served as a ship's executive officer. Below Taisa is Chusa, and above Taisa is Shôshô. For a full listing of ranks, see Star Army Ranks and Pay Scale.