Liverpool and Everton have both been linked with a move for the 23-year-old, but face competition from Ajax and PSV Eindhoven.
“There are a lot of clubs following him, but there is nothing concrete at the moment,” Kees Ploegsma told skysports.com.
“I don’t know anything about Liverpool and Everton and we will wait and see what happens in January.
“Of course Keisuke would be interested in playing in England. England is a very good country for playing football.
“If a club makes an offer and Keisuke likes that club something could happen, but we will wait and see.”