Tokyo looks at energy security differently than does Washington, or other major global capitals. This persistent and deepening reality—so incongruously at odds with the continual affirmations of solidarity and alliance in the US–Japan bilateral relationship—has substantial grounding in economics. Yet, the contrast in mindset between Japan and the broader world is sharply amplified by differences in domestic institutions and politics. This perceptual gap has major implications for East Asia's energy future and for global geopolitics as well.