What's pushing Japan's defense shift and a possible nuclear principle review?

The Japanese government has convened the first meeting of an expert panel to begin revising three of its most important security documents – the National Security Strategy, the National Defense Strategy and the Defense Buildup Program. The move marks the latest step in Japan's accelerating defense shift, following months of rising military spending, expanded security cooperation and changes to its arms export policies. So, what is driving the revision of these key strategies? Is Japan laying the groundwork for a further military buildup? And could its long-standing "no introduction" principle on nuclear weapons come under review?

Guests in this edition of Dialogue are Yang Xiyu, senior fellow from the China Institute of International Studies; Herman Laurel, president of the Asian Century Philippines Strategic Studies Institute; and Warwick Powell, adjunct professor from Queensland University of Technology.
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