Astra is an 8-part manga mini-series collaboration between American Golden Age Batman artist Jerry Robinson and American singer/songwriter Sidra Cohn along with Japanese mangaka Shojin Tanaka and Ken-ichi Oishi. Astra was originally conceived as a theatrical musical and represents one of the few instances of Americans collaborating with Japanese to create a true manga, as opposed to Amerimanga, which is Americans drawing in the manga style.