Vodafone said it was discussing with East Japan Railway Co (JR East) the possibility of buying all or part of its 15.1 percent stake. Vodafone said in a statement that discussions "may or may not lead to a public tender offer to acquire up to 21.7 percent of Japan Telecom's shares." With a combined 66.7 percent stake, Vodafone would be able to clinch management control over Japan Telecom and its mobile unit J-Phone Communications Co Ltd.