M
- (Minamiuonuma Shi) Myōgasawa
- (Niigata Shi) Matsusaki
- (Niigata Shi) Matsuhashi
- (Niigata Shi) Masugata
- (Niigata Shi) Matsuno’o
- (Sanjō Shi) Magaridani
- (Sanjō Shi) Moguradani
- (Uonuma Shi) Mitsumata
- (Tōkamachi-shi) Mitsuyama
- (Tōkamachi-shi) Mizusawa
- (Shibata Shi) Matsuoka
- (Niigata Shi) Maze
- (Minamiōnuma-gun) Mitsumata
- (Kashiwazaki Shi) Miyagawa
- (Kashiwazaki Shi) Miyagawa
- (Nagaoka Shi) Miyamotomachi
- (Iwafune-gun) Miyanomae
- (Murakami Shi) Miyanoshita
- (Nagaoka Shi) Miyauchi
- (Sado Shi) Mushiroba
- (Murakami Shi) Momokawa
- (Murakami Shi) Monzen
- (Sanjō Shi) Morimachi
- (Sado Shi) Moroo
- (Nagaoka Shi) Muikaichimachi
- (Murakami Shi) Murakamimoto
- (Tainai Shi) Muramatsuhama
- (Tōkamachi-shi) Murono
- (Sado Shi) Mano-shinmachi
- (Sado Shi) Matsugasaki