Okay kiddo, you know how sometimes important people like the president have to travel to different places for important meetings and events? Well, the Japanese prime minister is also a very important person and he needs to travel too.
But, the Japanese prime minister cannot just travel like you and me. They have to be very careful and take extra precautions for their safety. That's why they have a special plane just for them called Air Force One.
This plane is called the Japanese Air Force One and it's very fancy and big. There are different rooms for the prime minister to relax, sleep, work and even hold meetings. There's also a big dining area where the prime minister and important guests can have fancy meals.
The plane is also very strong and can stay in the air for a very long time without stopping. It has special features like a communication system so they can talk to people on the ground, and it can even protect itself from any danger.
So basically, the Japanese Air Force One is a special plane for the prime minister to travel safely and comfortably to important meetings and events.