The new high-performance Tatsu Yamashiro "Dragon Soul Dark Blade" manganese steel is forged and bent for 90 degrees without deformation. The cutting edge is processed by hand with hardness up to 60. Cutting iron does not hurt the edge, and cutting bamboo is like cutting vegetables. The sheath is 103 cm long, the blade length is 71 cm, the handle length is 26 cm, and the blade width is 3.2 cm. The solid wood paint sheath is painted with Yunlong.