Singer Koizumi Kyoko (photo, 38) and her actor husband Nagase Masatoshi (37) filed for divorce yesterday, their ninth wedding anniversary. The news was announced late in the evening on their respective fan web sites. They said that they remain on good terms but have become more like “cousins” than husband and wife. They also announced that have been separated for the last two years and there will be no alimony settlement. “Kyon-Kyon” was one of the top “idol” singers of the 1980s while Nagase is a highly regarded actor who appeared in the 1989 Jim Jarmusch movie “Mystery Train.”