TOKYO (Reuters) -Workers at a major Tokyo department store went on strike on Thursday after talks with management over the planned sale of their company broke down, marking the first major walk-out the country has seen in decades. Some 900 workers at the flagship Seibu store in the bustling district of Ikebukuro are protesting the planned sale of their company Sogo & Seibu, a unit of retail giant Seven & i, to U.S. fund Fortress Investment Group. Critics, which include local officials in Ikebukuro, argue that such a change, which would replace many individual boutiques in store, wo...