The Japanese fought World War II with largely inferior equipment. Part of this was because they believed that the superior fighting spirit of the Japanese soldier would overcome any material superiorities of his enemies. The Zero fighter was far superior to anything we had at the beginning of the war but was badly outclassed at the end. The Long Lance torpedo was superior to our torpedoes (which often failed to detonate), but that was about as far as it went. Japanese armor was poor, as was their radar, communications equipment in general, and small arms. The Nambu pistol, which was the standard sidearm of the Imperial Army, was one of the worst handguns ever issued, and the Arisaka rifle, while extremely strong and reliable, would have been fine in World War I, not World War II.