• Tempering line (Hamon) is real.
• Hardness of the blade: 40 ° and 60 ° Rockwell.
• Straightness of the blade spine.
• Blade tongue is forged in 1 piece with the blade and going inside the handle entirely.
• Chemical tests of grip wrap, EN 71, PAK.
• Chemial tests of scabbard material EN 71, PAK, AZO.
• No sharp edges on all sword parts, except for blade edge.
• Grip wrap test for tightness, min 500 Newton, and against oil resistance.
• Tsuba test: 500 N must the tsuba withstand minimum to not bend or slip above the blade.
• Dynamic Test of the blade: 10000 bending tests and no material-fatigue.
• Cutting tests: No breaks, cracks or deformation of the blade.
• 500 x hitting test on bamboo. Blade must not bend or deform.
• 50 x diagonal cutting test with tatami omote.
• 1000 x fit test of blade and scabbard. After 1000 x drawing the sword, it must sit tight in the scabbard.