神奈川條約
"The Bushido Blade" is a fictional sideline to the true events surrounding the treaty Commodore Matthew Perry signed with the shogun of feudal Japan. The samurai sword entrusted to Commodore Perry for President Franklin Pierce of the United States by the Emperor of Japan is stolen by factions wishing to maintain Japanese isolationism. The sword is stolen by Baron Zen, who is a servant of Lord Yamato, who opposes the Convention of Kanagawa about to be signed.