Changes

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

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

length units of "shaku," "sun" and "bu" are no longer used.

length units of "shaku," "sun" and "bu" are no longer used.

The legal designations of Tanto, Wakizashi, and Katana by their length under today’s Japanese laws are as follows  

The legal designations of Tanto, Wakizashi, and Katana by their length under today’s Japanese laws are as follows :

*Tanto - to be 30cm or shorter;

*Tanto - to be 30cm or shorter;

*Wakizashi - to be longer than 30cm but shorter than 60cm;

*Wakizashi - to be longer than 30cm but shorter than 60cm;