Dangerous if they never detached.… In the winter of 2028, the wind blowing across the reclaimed industrial coast of Yokohama smelled faintly of salt, machine oil, and overheated lithium batteries. The enormous hangar of the state-backed aerospace consortium glowed under floodlights even at midnight. Inside, engineers in flame-resistant suits moved around the partially assembled hypersonic cargo aircraft designated Kirin-X. The aircraft was intended to become Japan’s first commercially exported autonomous suborbital logistics platform — capable of transporting semiconductor components from East Asia to Europe in under three hours. At the center observation deck stood Kazuma Natori, a former bureaucrat from Japan’s Ministry of Economy, Trade and Industry. Ten years earlier, he had been one of the architects of the project’s public funding framework. At the beginning, the logic had seemed flawless. Private corporations alone could never have financed the infrastr...