I don't know for sure, but I think that the LC codes are Konami's internal catalog numbers for their CDs. If you go back though older Konami CDs, you'll see the LC codes on a lot of them. When they were publishing albums through other companies (like King Records), the record company's catalog number would have been the official number, but there would often be an LC code as well. Now that Konami is releasing albums through Konamistyle, the LC number is the official catalog number.
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