Nicknamed "Mushroom" for his hair cut.
Is placed in stage A along with Akiyama, Nao and Harimoto's group. He is originally cheated out of bidding on lot A by Harimoto. Then he is beat in bidding on Lot B by Harimoto and Akiyama. He then begins the breakdown of Nao's plan by bidding on lot F the lot designated for Yasukawa by saying he doesn't want a dirty traitor to win a lot. Later Shimoharada makes an alliance with Yasukawa to do a card exchange, but this is reported to Harimoto's group by Kawai and Harimoto's group outbids to gain the cards. He next tries an alliance with Taniaka which is discovered by Kawai who breaks it up by making them fight with one another.