Slovenia's star player Zlatko Zahovic, who had a spell with Valencia knows all about the Spanish players.
"They have fantastic players, especially Raul. I think my former team mate in Valencia Ruben Baraja could be a big problem for us.
"He led Valencia to the La Liga title this year. He is in a brilliant shape," Zahovic warned.
The Slovenian team is set to leave Mimasaka in the South of the Honshu Island on Monday for their main Korean base on the Jeju Island.
The farewell from the tiny town of Mimasaka will be difficult for both the team and their hosts.
"We really had incredibly good facilities to live and train here," Katanec added.