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