Omamori are little Japanese amulets, kind of like a good luck charm. They come in different shapes and sizes, sometimes with different pictures or designs on them. People in Japan believe that if they carry an omamori with them, it will bring them good luck, safety, and protection.
When you go to a shrine or a temple in Japan, you can buy an omamori from a vending machine or from a shop there. They are usually made by the priests or monks at the temple or shrine. They are meant to be personal and are not shared with others.
Omamori are often attached to a bag, cell phone, or keychain. Some people carry them in their pockets or purses. When you get an omamori, it's important not to open it up or take it apart because it's believed that doing so will ruin its power.
Overall, omamori is a special and important part of Japanese culture where many people believe in the power of positive energy and the protection it can give.