As a result, it's looking more and more unlikely that the midfielder will stay at La Romareda, says Marca.
If Real Zaragoza don't achieve promotion to LaLiga Santander, he will leave.
If they do get promoted, Kagawa is due a pay rise, but Real Zaragoza may not feel that is justified given he hasn't proved to be an important player in the squad.
After a promising start to the season, Kagawa has lost his place in the team thanks to the form of Alberto Soro and the arrival of Javi Puado.
Furthermore, the 31-year-old has struggled with injury, which has affected his performances on the pitch.