Kōyasan is a special place in Japan where people go to learn about Buddhism. It's a mountain town with lots of temples and shrines, and it's really peaceful and quiet there.
Buddhism is a way of thinking about life and the world around us. When people go to Kōyasan, they can stay in a temple called a "shukubo" and learn about Buddhism from the monks who live there.
The monks teach people how to meditate, which is a way to be calm and still your mind. They also teach people about compassion, which means being kind to others and doing good things to help them.
When people visit Kōyasan, they can see lots of beautiful things, like the Okunoin Cemetery, which is full of thousands of gravestones and lanterns. It's said that the cemetery is home to the spirits of many famous monks and samurai.
Kōyasan is a very special place where people can learn about Buddhism and experience a peaceful way of life.