What are their first and family names?

[Tom Punks]

Otsuka Ai - Otsuka is the family name
Utada Hikaru - Utada is the family name
Koda Kumi - Koda
Nakashima Mika - Nakashima
Shimatani Hitomi - Shimatani
Hirai Ken - Hirai
Amuro Namie - Amuro
Van Tomiko - Van
Yamashita Tomohisa - Yamashita
Kuraki Mai - Kuraki
Tsukamoto Takashi - Tsukamoto
Shibasaki Kou - Shibasaki

Is that what you meant? ^o)

[prussian blue]

Originally Posted by Tom Punks

Otsuka Ai - Otsuka is the family name
Utada Hikaru - Utada is the family name
Koda Kumi - Koda
Nakashima Mika - Nakashima
Shimatani Hitomi - Shimatani
Hirai Ken - Hirai
Amuro Namie - Amuro
Van Tomiko - Van
Yamashita Tomohisa - Yamashita
Kuraki Mai - Kuraki
Tsukamoto Takashi - Tsukamoto
Shibasaki Kou - Shibasaki

Is that what you meant? ^o)

how to pronounce it in japanese? BAN? and... is it common surname?

plus, hitomi's (who sang japanese girl) surname is furuya~ she once changed it to uesugi, which is her husband surname but after she got divorced she changed back to furuya again