Public perception of the national flag varies. Historically, both Western and Japanese sources claimed the flag was a powerful and enduring symbol to the Japanese. Since the end of World War II (the Pacific War), the use of the flag and the national anthem "Kimigayo" has been a contentious issue for Japan's public schools. Disputes about their use have led to protests and lawsuits. For the government of China and South Korea, the flag is a symbol of aggression and imperialism. Several military banners of Japan are based on the "Hinomaru", including the sunrayed naval ensign. The "Hinomaru" also serves as a template for other Japanese flags in public and private use.