Comparing the national power of Japan and South Korea reveals two advanced, highly capable regional powers with distinct strategic strengths. Japan generally possesses a larger nominal gross domestic product, a massive technological industrial base, and a globally dominant blue-water naval self-defense force with advanced maritime assets. Conversely, South Korea maintains a heavily armed, highly mobilized active-duty military force with sophisticated ground combat capabilities, advanced domestic defense manufacturing, and rapid technological innovation sectors, making them closely matched peers in East Asia.