I believe anyone who knows history knows that Koreans began to learn China culture in the Yuan and Ming Dynasties. Of course, the development of China culture in this era has also had a very far-reaching impact. However, with the rise of korean king, they began to want to establish their own role and get rid of the influence of Chinese characters as much as possible, which also made them try to exclude Chinese characters appearing on the streets of South Korea and the influence of China culture on South Korea as much as possible.
Of course, the reason why Japan's achievements in learning Chinese characters are higher than that of North Korea is more because of the Japanese's ability to learn Chinese characters and the reasons for their persistence. Although they are also establishing their own writing and culture through certain methods and changes, they have not given up the Chinese character culture. They have been learning Chinese characters and keeping them, which is also the reason why Japan and North Korea are very different. Naturally, both of them are trying their best to shape their roles.
However, Japan has kept the development of Chinese characters in its own country, which is the fundamental reason for the difference between them. Learning and innovation can make progress together, which we should understand in our daily life and study.