Labor union members at Japanese department store operator Sogo & Seibu Co. went on strike at its flagship Tokyo store Thursday in a rare work stoppage amid job security concerns stemming from the parent company's plan to sell the chain to a U.S. fund.Despite the first strike by a major department store union in 61 years amid an intensifying labor dispute, the parent Seven & i Holdings Co. said it decided at an extraordinary meeting the same day to sell the struggling department store chain to Fortress Investment Group LLC on Friday.Some 900 workers staged a walkout from the Seibu Ikebukuro …READ FULL ARTICLE