Japan's Emperor Naruhito and Empress Masako traveled to Britain for a three-day official state visit through Thursday. The following are questions and answers about their visit as state guests, and the relationship between Japan's imperial family and the British royal family.Q: What is a state guest?A: A state guest is a foreign dignitary who receives the highest level of hospitality during an official visit to another country. The honor is usually reserved for reigning monarchs, presidents and other heads of state, and includes elaborate ceremonies, banquets, and other events.Q: Has a Japa…READ FULL ARTICLE