There is one place named Ontani in Japan.
All places in the world called "Ontani".
Ono (18)
Ota (17)
Hongo (16)
Minato (15)
Wada (15)
Kawasaki (14)
Hama (14)
Ohama (14)
Tomari (14)
Nakamura (13)
Oshima (13)
Hara (13)
Nagahama (13)
Yoshida (12)
Okubo (12)
Sakai (12)
Hirose (11)
Kawaguchi (11)
Funakoshi (11)
Shinden (11)
Seto (11)
Okawa (11)
Kanayama (11)
Ogawa (10)
Ohara (10)
Nakayama (10)
Takata (10)
Oura (10)
Otani (10)
Shirahama (10)