China’s recent decision to target Japanese companies with export controls on critical minerals and “dual?use” technologies isn’t just an escalation in Beijing’s dispute with Tokyo. This is a moment of truth for democracies that still hope to compartmentalize economic engagement with China from geopolitical security realities.Last month, Beijing placed 20 Japanese companies on a list to restrict the sale of critical materials and dual-use technologies, citing Japan's increasing "remilitarization" as a reason for the restriction. An additional 20 Japanese companies were placed on a "watch list," subject to strict license requirements prior to shipping those same critical materials and technologies….