Kosaka's son, Kenji Kosaka, is a LDP politician and former minister of education.
Kenji Miyazawa | Kenji Doihara | Kenji Ito | Kenji Sawada | Kenji Yoshino | Kosaka mine | Kitarō Kōsaka | Kenji Yamaoka | Kenji Ozawa | Kenji Osawa | Kenji Ogiwara | Kenji Nomura | Kenji Kosaka | Kenji Kodama | Kenji Kawakami | Kenji Kamiyama | Kenji Hatanaka | Kenji Haga |