Or they could use good 'ol KCET
Um... they ARE KCET. I think you are confused.
KCEK did Circle of the Moon, Castlevania64 and Legacy of Darkness.
KCET did Symphony of the Night, Castlevania Chronicles port.
KCEN did the Saturn port of SotN and Castlevania Legends.
But all of this is just a history lesson, as none of those branches exist anymore. Everything's been blended to the Tokyo branch (formerly KCET) and now it's just "Konami Digital Enternainment", I believe.
There are no more teams from different cities (Kobe, Tokyo, Nagoya, and... uuurgh... I forgot the last one) anymore, just one merge in the Tokyo branch.