The picture shows a big group of young people having a barbeque in a park. I think they are probably from Japan.
There are about 20 people in the group, and most of them are wearing jeans and blue or dark-colored t-shirts. They are having a lot of fun, and some of them are making faces at the camera, which indicates the sense of humor and the fun they are having. Everybody is squeezing in together to try to get in the picture.
They are in some kind of a park or a forest. They could be on holiday, or it could be a school trip. They also might be a family because there also some other people at the background, so they might be having one of those big family barbeques, where the whole family, close ones and far gather to meet up and have fun and eat a lot of food. It reminded me of the barbeques I have with my family at the desert, where we make a fire and cook a lot of different kinds of food, like hamburgers, meat, hotdogs, potatoes, and drink tea and hot chocolates. I don't know what they are cooking, its probably hamburgers and hotdogs, but it could also be some special Japanese food!