A magnitude-4.7 earthquake jolted Japan\'s Ibaraki Prefecture in Kanto region at around 10:27 a.m. local time (0127 GMT)on Saturday, according to the Japan Meteorological Agency (JMA). The epicenter was initially determined at 36.1 degrees north latitude, 139.8 degrees east longitude, with a depth of 50 km. Strong tremors were also felt in Tokyo. There is no immediate reports of damage.