There were batch of newly debuted members in almost every year.
The last Momusu member from Platinum Era graduated last year.
Berryz "disbanded" as idol group, yet most of its members still work as staff in the company.
But most intriguing thing for me is the amount of girls from wealthy families.
I know some members in the past also rumored to be very wealthy to begin with. But the recent development in H!P cannot be ignored as this super group of idol slowly turns into rich girls club.
It all begins when 9ki recruited, which also marked as the start of H!P full regeneration process. Fukuchan told us that her late grandfather is a train cars collector, thus she get another nickname: Fuku-hime (lit. princess). And after that in each batch of member addition, whether a new group or new generation, may have at least one girl from wealthy or high-ranked status families.
Here is my list of those rich girls. They may wealthy/have high social status whether actual, rumored, or just my guess (labeled with [suspected]):
Morning Musume 9ki
- Fukumura Mizuki, dreaming to have a space shuttle at home, told us that his father is only a normal salaryman, but living in a luxury condo.
- Ikuta Erina, having golf as a hobby since kid.
- Sayashi Riho, estimated more wealthy than Kudo
Morning Musume 10ki
- Ishida Ayumi, runs a bakery.
- Sato Masaki, living in a foreign country when she still toddler, her family have personal ranch in Hokkaido which she used to see forest bear roaming around on it. Learned horse riding.
- Kudo Haruka, accidentally have same family name to her local Yakuza family, which some fans jokingly tried to connect why she have dominant behavior, back then when she still in egg and her early year in MM.
Morning Musume 11ki, Oda Sakura, a daughter of a politician.
Morning Musume 12ki
- Nonaka Miki, living in Alabama once, had piano lessons since kid. Seems not that wow, but i should flag her as [suspected]
- Haga Akane, a descendant of Sanada clan, but may not a direct descendant of Sanada Yukimura.
Angerme 2ki
- Tamura Meimi, still trying to remember something about her, so just flag her as [suspected]
Angerme 3ki
- Aikawa Maho [suspected]
Juice=Juice
- Miyazaki Yuka, recently crowned as one million yen beauty by fans because she give Karin a pack of Ishikawa-ken Ruby Roman, (100k yen average price per pack, and they hit 1m yen this year). Occasionally bring her hometown delicacies for her group
Country girls
- Yamaki Risa, attends one of most prestigious high-school in Japan. Very skilled in piano, painting and horse riding.
- Ozeki Mai [suspected]
Kobushi Factory
- Fujii Rio, although not same school with CG Yamaki, she also attends one of most prestigious high-school in Japan.
- Ogawa Rena [suspected]
Tsubaki Factory
- Tanimoto Ami [suspected]
please feel free to add what may I missed or deny what I said in the comments
Ayumi's family does not own a bakery; her mother bakes as a hobby. This was clarified some time ago. She's probably about as middle class as a member can get. I think one 2ch thread once referred to her as "the only true normal girl in all of H!P, ever," because she's the only one who doesn't seem to come from an affluent or well-connected family and her behavior, being as casual and excitable as it is, is representative as such.
I don't know if Oda's father is actually a politician or just tried to be (he did not get elected, as I recall). Her parents are also divorced, so that may have a negative effect on her family's status.
Ogata did ice skating. Ice skating is not a poor man's sport.
Meimi's mother either owns or manages her own theater company. Even if they're not wealthy, they're definitely well-to-do.
Nyon is loaded. Disney yearly pass every year, shops incessantly, redecorates her room every 6 months, etc.
Dawa goes to art school. Rich.
Basically any member that owns a dog has some money to burn. Dogs are expensive in Japan, both to buy and to keep. Meimi found one or both of her dogs in the street, but they still have the space to keep them; any member in particular that owned a dog before joining the group definitely comes from money.
I don't think it's just an H!P phenomenon, either. Rich girls have time to spend auditioning and doing these things without worrying so much about academics and getting good jobs.