Yoshinaga was also the grandfather of IRIE's eldest daughter, Wakaba IRIE (born Wakaba TAMURA, fathered by Michiyoshi TAMURA a former actor), who became known appearing in movies produced by the Toei Movie Studios and later in work by Nobuhiko OBAYASHI..
入江の長女で、東映京都撮影所作品、のちに大林宣彦作品で知られる女優入江若葉（出生名田村若葉、父は元俳優田村道美）の祖父に当たる。