The inauguration this week of India’s first high-speed rail corridor between Mumbai and Ahmadabad, using Japanese technology and financing, has a geostrategic significance that transcends its economic worth. It amplifies the growing closeness between India and Japan at a time when both nations are struggling to find their footing in an Asia being re-fashioned by an ascendant China.
New Delhi and Tokyo have long-standing territorial disputes with China. Both are concerned about Beijing…