Transitional Japanese?

[marblemanvintagemarbles]

I have posted this one before and wanted to revisit.  Size is 21/32" im about 90% sure that is a pontil mark right where the swirls all seem to pinch together on the bottom pole. 

[Ric]

A messed up Japanese transitional. It's hard to tell what the cut-off may have looked like under normal circumstances but based on the rest of the marble I'm guessing it's a Yasuda (pinched "pontil").