There are 5 places named Koyama in Japan.
All places in the world called "Koyama".
Ono (18)
Ota (17)
Hongo (16)
Wada (15)
Minato (15)
Ohama (14)
Tomari (14)
Kawasaki (14)
Hama (14)
Nakamura (13)
Hara (13)
Nagahama (13)
Oshima (13)
Sakai (12)
Yoshida (12)
Okubo (12)
Okawa (11)
Kanayama (11)
Hirose (11)
Funakoshi (11)
Kawaguchi (11)
Shinden (11)
Seto (11)
Shirahama (10)
Ichiba (10)
Ikeda (10)
Kamo (10)
Shimizu (10)
Takada (10)
Yamada (10)