Hemolytic uremic syndrome (HUS) is a condition characterized by destruction of red blood cells, low platelet count, and kidney failure. There are two types of HUS. Typical HUS follows a diarrheal infection often caused by E. coli OH157:H7.
Perhaps you mean what dynasty reigns in Japan. Akihito is the reigning Emperor of Japan, the 125th emperor of his line according to Japan's traditional order of succession. He acceded to the Chrysanthemum Throne in 1989. If you read wikipedia, you will observe a more balanced view of China's dynasty. Currently, and namely, there are 2 dynasties in China, with PRC being the de-facto ruling dynasty, with another less powerful ROC dynasty.
These origin myths formed the basis of the state and were used by the leaders of Japan to unify the people and justify their imperial rule. The Japanese imperial family is the world's oldest hereditary monarchy. The family dates in lineage back to the sixth century BC. The title of Tenno (emperor) or Sumera-Mikoto (heavenly sovereign) was assumed by rulers in the sixth or seventh century. Emperors were, and are known by the name, or names of their reigns.