Sekai meisaku dôwa: Hakuchô no mizûmi 1981
Directed by Kimio Yabuki | Starring: Tarō Shigaki, Keiko Takeshita, Yoko Asagami, Yoneko Matsukane
The hero, Prince Siegfried, is out riding one day with his friends when he spies amidst swans on a lake a particularly eye-catching one with a crown on its head, the familiar Princess.