Japan-US Keen Sword 27 expands to 45,000 troops, rehearses island defense near Taiwan

Japan and the US will conduct expanded Keen Sword 27 exercises from October 19-29, involving 45,000 Japanese personnel and 12,000 US troops, rehearsing anti-ship missile and air defense deployments on islands near Taiwan. The scale increase from 33,000 to 45,000 personnel and added focus on island defense signals a more robust deterrence posture, potentially complicating PLA planning for a Taiwan contingency. The exercise is part of a broader trend of enhanced US-Japan military cooperation, but the specific operational impact on PLA planning remains uncertain.