Nintendo co-Representative Director and Creative Fellow Shigeru Miyamoto (L) and Ubisoft Co-founder and CEO Yves Guillemot posed together during the Ubisoft E3 conference at the Orpheum Theater on June 12, 2017 in Los Angeles, California. —Christian Petersen/Getty ImagesWhat is the most powerful instrument of Japanese soft power? If you answered anime or manga, you are not completely wrong, but you are not thinking big enough. A clue to the corr…