I underestimated Japan’s determination to ruffle China’s feathers. In a November 2023 column, I argued that the apparently cordial meeting between President Xi Jinping and then US president Joe Biden in the US unsettled Japan, which wanted to attain its goal of becoming a “normal country” again. In a column last December, I said Japanese Prime Minister Sanae Takaichi’s hardened position against China – exemplified by her November 7 speech saying China’s forceful takeover of Taiwan could pose an....