A powerful storm lashed southern Japan with torrential rain and strong winds Thursday, causing at least seven deaths as it started a crawl up the length of the archipelago and raised concerns of flooding, landslides and extensive damage. Tropical storm Shanshan made landfall Thursday morning as a powerful typhoon on the southern island of Kyushu and then gradually lost strength, though it was still forecast to bring strong winds, high waves and significant rainfall to most of the country, particularly on Kyushu.