A Japanese man named Hayato Kato lives in China. He watched a Chinese movie about a very sad time in history. In the movie, Japanese soldiers hurt many Chinese people in the city of Nanjing. Hayato told people in Japan to learn about this history, but many people in Japan do not talk about it.

Many people in China feel angry because they think Japan does not say sorry enough for what happened in the past. China remembers the war with Japan as a very hard and painful time. In Japan, people often remember the war in a different way. They think more about the bad things that happened to them, like the bombs in Hiroshima and Nagasaki.

Today, China and Japan still do not agree about the past. Some people in Japan say the bad things did not happen. This makes people in China upset. The two countries have problems because they remember the war in different ways. This makes it hard for them to be friends.