Everlasting Female Idols!

Who is the most everlasting female idols? Let's discover something!
　
The ranking is divided into 4 phase... Let's start from the bottom!
　[Who is the most everlasting female idol? – 40 Year Olds]　[Who is the most everlasting female idol? – 30 Year Olds]　[Who is the most everlasting female idol? – 20 Year Olds]　[Who is the most everlasting female idol? - Total]Thus here, I'd like to state something, well in the total of course...
I'm happy to see Morning Musume topped the Top5 rank! This is a great news! Incridiblely unbelievable is Matsuura Aya topped the Top10 too and is yet another great achivement. However, in the moment of glory, that one phase with total of 3 words and 2 number had dissapoint me. I wonder why that name should exist when they had only been in the industry for 6 years.
　
Berryz Kobo has been in the industry for 7 years with only one loss of member and without anymore additional of members. That one stuff and fact had alreayd shown the strong feeling into Berryz.
　
I'm also dissapointed to see Ayaya's name come before AKB... but understandable as Ayaya is not much active like before...
　
Any of all, congrats!10. Moritaka Chisato
10. Kawai Naoko
9. Matsuura Aya
8. AKB48
7. Pink Lady
6. Nakayama Miho
5. Nakamori Akina
4. Morning Musume
3. Koizumi Kyoko
2. Yamaguchi Momoe
1. Matsuda Seiko5. Matsuura Aya
4. AKB48
3. Yamaguchi Momoe
2. Morning Musume
1. Matsuda Seiko5. Yamaguchi Momoe
4. Nakamori Akina
3. Nakayama Miho
2. Koizumi Kyoko
1. Matsuda Seiko5. Kawai Naoko
4. Nakamori Akina
3. Koizumi Kyoko
2. Yamaguchi Momoe
1. Matsuda Seiko