This “Ninja sword” is apparently a straight sword:
2.4. The legal definition that we tested as part of this consultation was as follows:
A fixed bladed article with a blade between 14-24 inches (the length of the blade being the straight-line distance from the top of the handle to the tip of the blade) with:
(i) A single straight cutting edge; and;
It sounds like most katanas and such, what I think people probably normally think of when they think of a “ninja sword”, are already banned under existing legislation, as they’re curved-edge, rather than straight-edge:
On April 6th 2008 a law came into effect banning samurai and other curved swords with a blade length of 50 cm or more; there are some exceptions for registered martial artists, re-enactors and even certain genuine Japanese swords.
An amendment to this act was passed, which came into effect on the 1st of August 2008. It allows curved and samurai swords which are handmade using traditional forging/production methods to be sold without a license.
Apparently the Japanese did use straight swords for a while.
Maybe the issue here is that importers avoided their previous restrictions by selling straight swords, and they’re making a new class to catch those and for God-knows-what-reason are calling it a “Ninja sword”.
This “Ninja sword” is apparently a straight sword:
It sounds like most katanas and such, what I think people probably normally think of when they think of a “ninja sword”, are already banned under existing legislation, as they’re curved-edge, rather than straight-edge:
https://www.katanamart.co.uk/content/27-uk-samurai-sword-law
Apparently the Japanese did use straight swords for a while.
https://en.wikipedia.org/wiki/Chokutō
Maybe the issue here is that importers avoided their previous restrictions by selling straight swords, and they’re making a new class to catch those and for God-knows-what-reason are calling it a “Ninja sword”.