Accompanied by a certificate of registration as a Tokubetsu Hozon Token [Sword especially worthy of preservation] no. 148910 issued by the Nihon Bijutsu Token Hozon Kyokai [Society for the Preservation of the Japan Art Sword] on 25th December 2003
There are believed to have been two smiths named Kunizane working in the first part of the 14th century, son and grandson of Rai Kunitoshi, first of the Rai school of Yamashiro (Kyoto-fu). Like other Kamakura period Yamashiro work the hada is of the finest ko-itame with much ji-nie. Umetada Myoju is said to have been inspired by the work of the Rai school and this deeply influenced the work of the first Tadayoshi (see Lots 431 and 444).