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