A powerful earthquake struck Japan on Sunday, killing at least one person and injuring 150 others as it damaged buildings and triggered a small tsunami along the coast, media reports said. The quake was with a 6.9 magnitude. It struck in the morning on the north coast of Ishikawa prefecture, Japan's Meteorological Agency said. The agency issued a tsunami warning urging people near the sea to move to higher land. The quake toppled buildings, triggered landslides, cut power, interfered with phone service, broke water mains and snarled public transportation.