About the only place in Europe where I think it´s possible to get quality for somewhat reasonable prices is Kikaku in Duesseldorf, Germany.
Kikaku
Klosterstr. 38
Düsseldorf
Tel:0211 357853
The owner ( a lady residing in Tokyo ) has recently opened a dependance at Duesseldorf Airport but haven´t eaten there so can only vouch for the orginal location.