Well, it involves a team of creators including writers, illustrators, and editors. The writers come up with the story ideas, the illustrators draw the characters and scenes, and the editors make sure everything fits together and is appealing to the readers.
The process of making Shonen Jump comics is quite complex. First, there's the conception of the story concept. Then, detailed character designs are made. After that, the actual drawing and inking take place. Finally, the colors are added and the text is incorporated for a polished final product.