Okay, so imagine if you and your friend are telling a story about what happened at the playground. You might remember things a little differently, right? Now imagine if a whole bunch of people are telling stories about what happened in the past, like hundreds of years ago. Everyone's going to remember things differently, especially if they lived on different sides of a big event.
That's kind of what's happening with Japanese history textbooks. A long time ago, there were some really big events in Japan's history that people have very different memories and feelings about. One of these events is World War II, which Japan was a part of. Some people in Japan feel really bad about what happened during that war - they think Japan did some really bad things, like hurting other countries and their people. Other people in Japan still feel like Japan didn't do anything wrong, and they don't want to talk about it.
So when it comes to making school textbooks, it's a big decision which stories to put in and which to skip over. Different groups of people want different things in the books. Some people want everything to be about the good things in Japan's history, like the art and the temples and the traditions. Other people want to make sure the books include the bad things too, so that kids can learn from the mistakes of the past.
Some people say that the Japanese government is trying to change what's in the textbooks so that they tell more of the happy stories and leave out some of the stuff that makes Japan look bad. Other people say that the textbooks are just telling the truth, and that everyone is being too sensitive. It's a big debate that has been going on for a long time, and it doesn't look like it will be settled any time soon.