Environmental campaigning group Greenpeace on Tuesday urged Meiji Seika Kaisha Ltd to name the companies and products using a sweetener made with an unapproved GMO additive. Meiji Seika, Japan’s biggest chocolate maker, has halted sale of its potentially lucrative GF2 sugar alternative. On the advice of the authorities, the company last week announced a voluntary recall of GF2 and six types of diet food containing it.