Japan and South Korea have defied a Chinese edict to report any air travel through a newly declared air defence zone in the East China Sea. The two countries sent military aircraft without informing China, further complicating tensions in a long-running dispute over a small group of islands administered by Japan but also claimed by both China and Taiwan. James Manicom, an expert on ocean governance in Asia, comments on what this means for the region, both on the ground and in the air.
