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.
Hierarchy In Feudal Japan. Society was divided into two classes in Feudal Japan, the nobility and the peasants. The noble class made up roughly twelve percent of the population with peasants making up the rest. Emperor and Shogun. The Emperor and the Shogun were the highest ranking nobles. During Japan's feudal period the Shogun held the most power while the Emperor was more of a puppet figure with little actual power. As the Shogun was a military leader his sword, or Nihonto in Japanese (katana came later in the Mid-Muromachi period), was an important part of his attire.