well, both of you say the same thing so i guess it is in fact A. vibakari. It is a listed species for Korea but I had never seen one previously and could not find any pics of one. The reason I sort of ruled that out (prior to you IDing it)is because of the common name (Asian keelback). It made me assume that it had keeled scales and although it may have had keeled scales, my recollection of it as well as the pics I took (bad pics) made me think the scales were smooth. I may be wrong about the scales or the common name may be misleading. I had considered Coluber spinalis as this is also a listed species and again i could not find any pics of it but again, I had nothing to base it on as I had no info on either species. That is why I posted here because I figured you guys would know. Thanks for IDing it for me. I would like to find another one and get some better pics. Can't wait till warm weather gets here. Thanks again,
Don