Japan has a population of 125 million people with a long cultural history. The Japanese language is distinct from English and there are several dialects across the country. Public school meals in Japan tend to be healthier than American meals, featuring seafood, vegetables, noodles and rice, though portions are smaller. Education in Japan includes mandatory primary and middle schools, as well as selective and competitive high schools focused on college preparation. Students must learn four writing systems, including the most challenging Kanji system based on Chinese characters. While Japanese high school students report having no homework, they regularly spend several hours per night reviewing lessons and preparing for the next day of school.