What can cultural celebrations tell us about the people of the world? Festivals are the one time of the year where families, communities and whole countries come together to celebrate. But what do these ritual festivals tell us about people and their cultures? Tonight food writer Stefan Gates travels to Japan for the Naked Man Festival and the intriguing Baby Sumo festival. Japanese people work the longest hours and have the shortest holidays of any industrialised nation, so they value their festivals very highly.