Thanks to famitsu we finally get a good look at the Ryu Ga Gotoku 6 Clan Creator trading cards inside specially marked packs of wafers sold in Japan. Going on sale starting December 12th (a few days after the game releases) you can grab a pack for 300 Yen each. If you can find them

Each pack contains 2 of 54 different possible cards  meaning that if you want to get them all you’re gonna need a LOT of wafers! Each card contains a code that will allow you to unlock that character in Yakuza 6’s Clan Creator!