A person can have one of four blood types , A , B , AB or O , and while the most common blood type in Japan is Type A , many of the more prominent Japanese players are like Matsuzaka , Type O . That group includes Hideki Matsui of the Yankees , Kazuo Matsui of the Colorado Rockies -LRB- and formerly of the Mets , with whom he was a huge disappointment -RRB- and Tadahito Iguchi of the Chicago White Sox .