Nakamura has agreed a £23,000-a-week two year deal with the La Liga side.
The 30-year-old, who is out of contract at Celtic, was expected to return to Yokohama Marinos.
Nakamura has agreed a £23,000-a-week two year deal with the La Liga side.
The 30-year-old, who is out of contract at Celtic, was expected to return to Yokohama Marinos.
