Koizumi Station
- Ehime Prefecture
- Gifu Prefecture
- Gunma Prefecture
- Higashi-Koizumi Station
- Hokuto, Yamanashi
- Iyo District, Ehime
- Kai-Koizumi Station
- Koizumi Station (Ehime)
- Koizumi Station (Gifu)
- Koizumimachi Station
- Masaki, Ehime
- Miyagi Prefecture
- Motoyoshi District, Miyagi
- Motoyoshi, Miyagi
- Nara Prefecture
- Nishi-Koizumi Station
- Oizumi, Gunma
- Ora District, Gunma
- Rikuzen-Koizumi Station
- Tajimi, Gifu
- Toyama Prefecture
- Toyama, Toyama
- Yamanashi Prefecture
- Yamato-Koizumi Station
- Yamatokoriyama, Nara