Just been to the tetsudo website and, to be honest, it doesn't actually tell you a great deal about the art. An experienced martial artist could look at it and think that there are a lot of worrying 'Confuscious says....' moments about it.

Is it is 'soft style' eg aikido?
Is it a 'harder' style eg shotokan karate?
Is it more like boxing, muay thai, etc?

Is it structured like 'If you kick me like this, then I will block your kick like this' etc

Are there practiced forms, kata, etc.

A bit more explanation into what the art actually involves would be more helpful

Also, a worrying part about the website mentions that you can progress onto breaking boards, etc. This is one thing I absolutely HATE about certain martial arts - "Look how hard I am, I can jump through the air and break this board." The board however, is not able to block the kick/punch, recover and then kick your head in!!