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.
The Kamakura period (1192 to 1333) began the rule of a single Shogun, and the Emperor being pushed back into a ceremonial role. There was a brief attempt to restore power to the Emperor and the Imperial Court, known as the Kemmu restoration, that lasted from 1333 to 1336. The Muromachi period, starting in 1336 began the rule of the Ashikaga Shoguns.