Kozuchi fortune hammer @ estate sale price of $100. Japanese Silver Craft "Kozuchi(Fortune-hammar)" Carved by Pure Silver made by Takehiko. Japanese Silver Craft "Kozuchi(Fortune-hammar)" Carved by Pure Silver made by Takehiko. This is a fortune hammer from ancient times in Japan was made with pure silver. When a fortune hammer is shaken,happiness is comes. The tale is about Uchide-no-Kozuchi, a legendary Japanese hammer, andbthe name translates as “Small Magic Hammer†or “Miracle Mallet†and, in English, as “Lucky Malletâ€. It is said that swinging the mallet grants its holder’s wishes. It plays an important role in the legend of Issun Boshi (One-Inch Boy), from the Otogizoushi, a tale written in the Muromachi Period, which tells a story of a tiny hero called Issun Boshi whose height is just one sun (slightly over an inch).