Japan will host the leaders of five Central Asian countries in Tokyo this week, a meeting analysts say is meant to show that “Japan is back” as an active player in a region where global powers are competing for influence, minerals and transport routes. The summit with Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan and Turkmenistan, scheduled for Friday and Saturday, is also expected to consolidate Tokyo’s long-standing but “often underestimated role” in Central Asia as a trusted and non-coercive...