does anyone know if the uchi mata exists in another fighting art/system? aside from the obvious, it's in jujutsu since kano took it from jujutsu. i'm very interested in compiling a list of throws that are unique to judo and doesn't exist in another other arts. for example, i don't think the uchi mata exists in wrestling (since most wrestlers are surprised by it as a counter to the duck under) but the kata guruma was adapted by kano when he read about it in a wrestling book.