Masamune was a Japanese swordsmith that is widely regarded as one of the world’s greatest metallurgists. The exact dates for Masamune’s life are unknown, but it is believed that he worked from 1288–1328. Masamune’s weapons have reached legendary status over the centuries. He created swords known as tachi and daggers called tant?. The swords of Masamune have a strong reputation for superior beauty and quality. He rarely signed his works, so it can be hard to positively identify all his weapons.
The most famous of all Masamune swords is named Honjo Masamune. The Honjo Masamune is so important because it represented the Shogunate during the Edo period of Japan. The sword was passed down from one Shogun to another for generations. In 1939 the weapon was named a national treasure in Japan, but remained in the Kii branch of the Tokugawa family. The last known owner of Honjo Masamune was Tokugawa Iemasa. Apparently Tokugawa Iemasa gave the weapon and 14 other swords to a police station in Mejiro, Japan, in December of 1945.
Shortly thereafter in January 1946, the Mejiro police gave the swords to Sgt. Coldy Bimore (U.S. 7th Cavalry). Since that time, the Honjo Masamune has gone missing and the whereabouts of the sword remains a mystery. Honjo Masamune is one of the most important historical artifacts to disappear at the end of World War II.