The South Korean government has apparently canceled their plans to open their marketplace to video game systems, such as the Playstation 2 and Dreamcast, because Japan would not agree to revise their history textbooks.
The government of South Korea's problem with these textbooks is that they fail to mention the atrocious acts of which Japan committed against South Korea, China, and other Asian nations during World War II. Repeated attempts by the South Koreans were made to change the books, but the Japanese government ignored these pleas.
Interestingly, the sanctions did not prohibit other Japanese entertainment forms such as comics.
The Foreign Ministry stated that they plan to bring up this matter during a world conference on racism this August.