Hitsuji Yaai!

You play as a shepherd who must gather sheep into the pen before nightfall so that he can go date his girlfriend. You catch the sheep by running into them and then dragging them to the pen. You can close the pen gate to stop sheep from escaping. But watch out for the wolves who will tear open the gates again. The game was programmed by Kikuta Masaaki, notable for making the Hudson hit game Binary Land.