A 7.4 magnitude earthquake struck northern Japan on Monday, Japan's Meteorological Agency (JMA) said, issuing a tsunami warning for waves up to three metres. ADVERTISEMENT ADVERTISEMENT The quake hit at 4:53 pm local time in the Pacific Ocean off northern Iwate Prefecture. Eyewitnesses say the tremor was strong enough to shake large buildings as far as Tokyo, hundreds of kilometres away. The earliest tsunami waves could reach the northern shoreline immediately, the weather agency said. "