Here is an example of oten.
Okay, so you can see that this type of movement is important for the evading strikes and different weapons that are coming in. As you're trying to escape slowly you want to come over like this. Just your basic cartwheel, but using it in a way that it feels like you are on a battlefield. One more time go here and coming up into your kamae. Very useful for dodging swords. This is oten.