M
- (Sado Shi) Mano
- (Sado Shi) Mushiya
- (Sado Shi) Mitsuya
- (Murakami Shi) Minamiōdaira
- (Tainai Shi) Mitōshi Gawa
- (Tainai Shi) Momozakihama
- (Murakami Shi) Maoroshi
- (Murakami Shi) Majima
- (Sado Shi) Maki
- (Sado Shi) Mitoda
- (Sado Shi) Mushizaki
- (Sado Shi) Mitate
- (Sado Shi) Masaragawa
- (Sado Shi) Moura
- (Niigata Shi) Mabori
- (Nagaoka Shi) Makiyamamachi
- (Tōkamachi-shi) Matsudai
- (Niigata Shi) Matsugasakihama
- (Gosen Shi) Muramatsu
- (Niigata Shi) Maki
- (Minamiuonuma Shi) Muikamachi
- Mitsuke
- Murakami