Iaito (居合刀 Iaitō) is a modern metal practice sword, without a cutting edge, used primarily for practicing iaido.
A real (sharp) katana is called a shinken (真剣?, lit., real sword) . In contrast to shinken, iaitō have no cutting edge and are designed for iai/battō practice and are usually unsuited for sword-to-sword contact. These should not be confused with other fake swords, which are primarily made for decorative reasons and generally unsafe for martial arts practice.
Most iaitō are made of an aluminium-zinc alloy which is cheaper and lighter than steel. This use of alloy and a blunt edge also avoids the Japanese legal restrictions on the manufacture of swords made of ferrous metals. As such, Japanese-made iaitō are intended as practice weapons and are not suited for any type of contact. The best alloy blades are rather faithful reproductions of real swords with authentic weight and shape along with similarly high-quality finish and fittings. Iaitō may even have a mock hamon (刃文?, lit., blade pattern, the temper line of a tempered steel blade) . The average weight for a real uchigatana (打刀) is typically 1,200 g without the scabbard while a typical alloy iaitō is roughly 820 g. Some steel iaitō are also constructed and can weigh around 900–950 g for a 74 cm blade.
For a long time he's been lucky man
No difference if it's good or bad
The trigger's his - the orders others
No way to stop the final blow
The message: here ya go
The countdown's on a roll
War against the world
All systems deadly armed
Machine, man, all in one
They're all oblivious to the crime
Braindead hero
Braindead hero - out of the sun he comes
Braindead hero
Braindead hero - feel the blazing guns
Now we got to blow his circuitry
Drain the poison from his veins
Degenerate - corrupt his memories
Fire at will - just do or die
The message: here ya go
The countdown's on a roll
War against the world
All systems deadly armed
Machine, man, all in one
They're all oblivious to the crime
Braindead hero
Braindead hero -like a hammer from the sky
Braindead hero
Braindead hero - supersonic cry
You better stay just where you are
Consequences in the fire
Braindead hero
Braindead hero - out of the sun he comes
Braindead hero