It seems a mix beetween kyokushin and judo.

i think they have a better kuzushi than a lot of judokas!!
its very impressive

DMG

http://youtube.com/watch?v=01_kQd8pOus

on the other hand, is funny how easy they expose their arms for jujis
and also they seem to have a rather poor groundwork.

I would imagine many Kudo practitioners have more of a Kyokushin, or other Karate background, and feel less comfortable on the ground. I imagine that there are other Kudo practitioners that feel more comfortable grappling than striking. I doubt grappling skill is universal or constant in the Kudo world.

How I wish this was in the states.

Repeated elbows to the face breaks balance pretty good.

Here's a small docu about that sport
http://youtube.com/watch?v=usCbSgt-zls

lol that vid was coollol that vid was coollol that vid was coolwhoops my bad