Traditional Japanese toilets are still common in public bathrooms and some homes.
They are a trench shaped hole with a drain at one end.
To use one we need to squat with a foot either side of the trench facing the direction of the hole.
The rest is natural and will be evident

Modern Japanese toilets are super advanced and computerised and you can see all about them by looking at this video:
http://www.metacafe.com/watch/539639/toilet_computer_operated/

If you want to know more about this delicate subject or want to share your experiences (do we really want to hear them?? ) please post here: