A magnitude 6.0 earthquake has struck off northern Japan. There were no immediate reports of damage or injuries and no risk of tsunami.<br/><br/>The Japan Meteorological Agency says the quake struck at 5:22 a.m. or 1:52 India time off Iwate prefecture at a depth of about 30 kilometers.<br/><br/>It shook the same region hit by a deadly earthquake and tsunami in 2011.'<br/><br/>