Which Masamune sword is on display in the Tokugawa Art Museum?

Masamune also known as Gorō Nyūdō Masamune is widely recognized as Japan's greatest swordsmith. He created swords and daggers, known in Japanese as tachi and tantō respectively, in the Soshu tradition. No exact dates are known for Masamune's life and he has reached an almost legendary status. It is generally agreed that he made most of his swords in the late 13th and early 14th centuries, 1288–1328.

One of the best known of the swords created by Masamune is the Honjō Masamune. However, it is the Hōchō Masamune that is now on display in the Tokugawa Art Museum.

The Hōchō Masamune refers to any one of three particular and unusual tantō attributed to Masamune. These tantō have a wide body, unlike his normal slim and elegant work, making them appear quite similar to a Japanese cooking knife. It was restored around 1919 and sold for approximately 10 hiki; this was worth roughly 14¢ US at the time, meaning that the price was remarkably low.