Key technologies for Japan Sodium-cooled Fast Reactor (JSFR) have been evaluated. The ten technologies - high-burnup core, safety enhancement, compact reactor vessel, two-loop cooling system using high-chromium steel, integrated intermediate heat exchanger/pump component, reliable steam generator, natural-circulation decay heat removal system, simplified fuel handling system, containment vessel made of steel plate-reinforced concrete, and advanced seismic isolation system - have been confirmed to be ready for installation to a conceptual design of demonstration JSFR and large-scale demonstration experiments.