UmiumaCorp
UmiumaCorp is a parody of KaibaCorp, which is mentioned in the Tag Force games.
Employees
The president of UmiumiCorp is Kaiser Umiuma, who is a parody of Seto Kaiba and uses a similar Deck. Other employees include Umiuma's right-hand man Inoso and the company's mascot, Mokuma.
The members of Umiuma Corp are in a feud with Sanzyudai Yuki and express an interest in competing in the Tag Force tournament.