Genno

Genno was a massive, long-handled Rokugani hammer used for demolition and construction. Essentially a scaledup artisan's hammer, it consisted of a square or octagonal steel head mounted on a long ironwood haft around four feet long. The head was made from relatively soft steel and had two hardened striking surfaces: one flat, the other slightly convex or crowned. The flat head was used for basic hammering, chiseling, and demolition. The crowned surface was used for driving spikes and nails flush with surfaces and other work that required a more focused power.