The national flag of Japan is a rectangular white banner with a red circle at its center. The flag is officially called the Nisshōki (日章旗, 'flag of the sun') but is more commonly known in Japan as the Hinomaru (日の丸, 'ball of the sun'). In addition to instructing the schools to teach and play Kimigayo, Tanaka wanted students to raise the Hinomaru flag in a ceremony every morning, and to adopt a moral curriculum based on certain elements of the Imperial Rescript on Education pronounced by the Meiji Emperor in 1890. One tradition is that no writing should touch the sun disc. The tradition of signing the Hinomaru as a good luck charm still continues, though in a limited fashion.