“In an increasingly severe security environment, no single country can now protect its own peace and security alone,” declared Japanese Prime Minister Sanae Takaichi last month, signalling a major shift in Tokyo’s defence posture. “Under the new system, we will strategically promote equipment transfers while making even more rigorous and cautious judgments on whether transfers are permissible,” she added, confirming long-running speculation that Tokyo would relax decades-old restrictions on...