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