Hakama is also like trousers and here is how to wear it! I guess this guy wear very similer with Hakama.Yes, they do look like these.
As far as i know, they are based on a design for fisherman which is used in many countries.
They are like trousers with a wrap over and would have been made from a single piece of fabric and wrapped around the body in various ways and tied with string of sorts.
Someone else may know more about this particular design.
The costume this guy wears is perfect for what he does but would not appeal to everyone as it lacks the opportunity to 'dress up'.