There are 2 places named Koike in Japan.
All places in the world called "Koike".
Ono (18)
Ota (17)
Hongo (16)
Wada (15)
Minato (15)
Tomari (14)
Ohama (14)
Kawasaki (14)
Hama (14)
Nakamura (13)
Hara (13)
Nagahama (13)
Oshima (13)
Yoshida (12)
Okubo (12)
Sakai (12)
Okawa (11)
Kanayama (11)
Hirose (11)
Shinden (11)
Seto (11)
Funakoshi (11)
Kawaguchi (11)
Shimizu (10)
Otani (10)
Takada (10)
Yamada (10)
Ichiba (10)
Ikeda (10)
Kamo (10)