I don't know what's the meaning of this post but I mind you that it was decided on Korean side to possess 6 of those vessels and form 3 fleets with one of them operational and second in maintaince. Besides, talking about matching Japan, Korean ones should get commisioned by the 2022-26 timeframe (or even take it further in time depending on what they will have on hand like radar equipement etc) while the next two Japanese AEGIS euqipped vessels (tested and capable of BMD duties) are perspective of the next 6 years (by 2020).
So no. Nothing like matching Japan. This is what they want for whatever logic might be behind it (operiting fleets with 1xDokdo or whatever will come after it, 1x Aegis equipped vessel, 2x KDX-II (or KDX-IIa variant)).