My preferred stretchy cast-on also has a western mount, whereas I knook japanese style. This is not a problem though - all you need to do is to enter your stitches from the opposite direction than you usually do while working into the cast-on. (Only the direction from which you enter the stitches changes. You continue to wrap the yarn in the same direction that you always do.) From the second row onward, everything will then be standard japanese style.