Ok I have been researching and thinking and I am fairly sure I will go down the one-to-one route with private teaching here in Japan. I have a friend in UK who teaches Japanese so she has been helpful guiding me to some websites for resources and advice.
I have been drawing up a list of things I need and the costs so its just deciding on which materials to invest in creating some ideas and deciding which websited to regoster with adn my potential working hours :D
I still have no indea what I need to get started though and I hope that charging 1800en an hour is reasonable,I will offer friends/groups of up to maybe 4 for 1500en each. I realise teaching more than one is more profitable and possibly easier from a teaching perspective.
Hopefully over the next couple of weeks I will either have some form of contact or at least be registered and ready :P will keep this updated.