No, Utada Hikaru is an only child - those lyrics are only lyrics. Her mother was famous so its pretty easy to find pictures of her, but I haven't been able to find pictures of her father, though I haven't looked that widely.

Here is an image gallery of her mother, during her days as "Fuji Keiko": http://binitan.hp.infoseek.co.jp/JapanArt/FujiKeiko/FkGalleryMain.htm

If you google image search her stage name, you should get more photos.

[ictures of Utada "skingg" Teruzane, however... Ihaven't been able to find. Just keep tryin', I guess! (haha I have jumped on the corny pun bandwagon)