Imported from Japan. These Sumo trading cards are based on the November 2012 rankings. Each pack contains 5 random cards. The complete set has all 42 top division (Makuuchi) wrestlers, 28 second division (Juryo) wrestlers, 3 special Harumafuji cards (this is his first series of cards as a newly promoted Yokozuna), 4 up and comers, 1 referee card, and several other types of cards for a set total of 99 cards. See the scanned checklist for details (which are in Japanese). Most of the text on the cards is in Japanese, however, the wrestler's English language name is also on the card for those of us who don't speak Japanese.
Yokozuna for this series are Hakuho and Harumafuji (newly promoted).
Ozeki are Kakuryu, Kisenosato, Kotoshogiku, Kotooshu, and Baruto.
Check out this link for the Makuuchi and Juryo rankings from November 2012 for a complete listing of all wrestlers from the top 2 divisions.