Continuing the topic, I've been watching Japanese TV shows for over 8 years and the only women I remember are...
Mari Sekine - used to host Music Japan - probably the biggest exception and I quite like her. She might have some help from her popular comedian father. She also studied in US (graduated with honours) and is one of the very few Japanese celebrities with a perfectly fluent English.
Becky - now on ItteQ as well as other shows - is half-Japanese ethnically. I remembered her straight away thanks to her unusually bright fashion. She's basically goes for the cutesy style and yet strangely it doesn't annoy me.
Mori Izumi - half-Japanese - her Grandmother is a famous fashion designer. Her family is very privileged and she got an international education so her behavior is far from that of conventional Japanese women. She's very blunt and sometimes even rude but I think that's the reason she gets invited to shows.
Kagami Seira - half-Japanese - and the only reason I remember her is that she was publicly disgraced on account of her femininity because of Tegoshi's crossdressing. Twice.
Suzuki Nana - a popular model and TV personality who I have seen several times on TV lately. But honestly from what I can tell the only reason she gets invited to shows is because she's dumb and everyone is having a great time by making fun of her.
There's also the hosts of J-Melo who are all pretty and fluent in English but I can't remember their names right now. Basically, most of the women above are half-Japanese and from what I've gathered to Japanese people half-Japanese is not Japanese and thus not really expected to adhere to the Japanese standards. And even those who have Japanese parents have received education abroad which probably resulted in them having non-Japanese role models and behavioral patterns. Of course, having influential family helps too.