Japan's Emperor Akihito, 85, has abdicated. He was emperor for 30 years. He abdicated because of his health. He thinks his son, Naruhito, can do the emperor's duties better. People will remember Akihito for his kindness. He always visited people after earthquakes, tsunami and other natural disasters.

Emperor Naruhito, 59, is the 126th emperor of the world's oldest monarchy. He studied at Oxford University. His wife, the new Empress Masako, studied at Harvard University. Naruhito received a sword and a jewel that are thousands of years old. There was a special ceremony. Millions of Japanese watched the historic event.