Changes

*Katana - to be 2 shaku (=60.6cm) and longer.

*Katana - to be 2 shaku (=60.6cm) and longer.

Blade lenghts are always measured steight between the Hamachi and the Kissaki.

Blade lenghts are always measured streight between the Hamachi and the Kissaki.

Since the official adoption of the metric system in 1891, the traditional  

Since the official adoption of the metric system in 1891, the traditional