Raikan is a way of working together to help farmers grow crops better. Think of it like a group of friends helping each other out with their homework. Farmers who are part of a raikan group get together regularly and share their knowledge and experiences. They talk about things like which seeds are best to plant, how to water the crops properly, and how to make sure bugs and other things don't eat the plants.
When farmers work together like this, they can learn a lot from each other and help each other avoid mistakes. They can also buy supplies, like fertilizer, that they need in bulk, which makes it cheaper for everyone.
Working in a raikan group can really improve the quality and quantity of the crops that farmers grow and make sure everyone has enough food to eat. It's kind of like teamwork - when we work together, we can accomplish a lot more than if we try to do everything by ourselves!