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.
However, in common parlance members of any family which reigns by hereditary right are often referred to as royalty or royals.. It is also customary in some circles to refer to the extended relations of a deposed monarch and his or her descendants as a royal family. A dynasty is sometimes referred to as the House of .... As of July 2013, there are 26 active sovereign monarchies in the world who rule or reign over 43 countries in all.