Gokaden means the regional characteristics of the Japanese sword produced during the Koto period(900 to 1596) in 5 major regions; Bizen, Mino, Soshu, Yamashiro, and Yamato province. These traditions were not, However, the rules the smiths of the time followed. If anything, they’re the regularities quite often found in the swords produced in each region.
This sword appraisal concept introduced by the notable appraiser Honami Koson (本阿遜) at the end of the Meiji period.
The following table is the summary of metal characteristics of Gokaden; the grain pattern(Hada), the crystal particle appearance(Nioi/Nie), the outline of the hardened area(Hamon), and other distinctive characters. Knowing these characteristics is an important part of the older swords appraisal process.
|YAMASHIRO||Finely grained MOKUME||Small NIE||SUGUHA|