Imported from Japan. These Sumo trading cards are based on the November 2013 rankings. Each pack contains 5 random cards. The complete set has 41 top division (Makuuchi) wrestlers, 28 second division (Juryo) wrestlers, a couple referee cards, 8 new young wrestler cards, 9 technique cards, 3 retirement cards, a mascot 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.
Ozeki are Kisenosato, Kotoshogiku, Kakuryu, and Kotooshu.
Check out this link for the Makuuchi and Juryo rankings from November 2013 for a complete listing of all wrestlers from the top 2 divisions.