The landslide victory of the governing Liberal Democratic Party-Komeito alliance in Japan's upper parliamentary house on Sunday means that Prime Minister Fumio Kishida has both the mandate and means to amend the constitution. The prospective changes would allow Japan to use military force in more circumstances and bolster its offensive combat capabilities. On Monday, Kishida suggested he would move to make these changes without delay. They would have to be approved by a public referendum, even if the country's parliament did give its assent. But it is clear that Japan is moving toward a more robust deterrence doctrine in the...