| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Machi | city | Nagano | Japan | 35.25 | 137.75 | 3349 | 2961 |
| Machi | city | Nagano | Japan | 36.68 | 138.00 | 2509 | 3314 |
| Machinaka | city | Nagano | Japan | 36.24 | 138.52 | 2509 | 39877 |
| Maezaka | city | Nagano | Japan | 36.91 | 138.43 | 1807 | 12025 |
| Magario | city | Nagano | Japan | 36.45 | 138.30 | 2509 | 42082 |
| Maki | city | Nagano | Japan | 36.76 | 137.93 | 3349 | 3634 |
| Maki | city | Nagano | Japan | 36.68 | 138.39 | 2549 | 18436 |
| Makino | city | Nagano | Japan | 36.08 | 137.91 | 3349 | 26524 |
| Mamejima | city | Nagano | Japan | 36.63 | 138.23 | 1115 | 120183 |
| Managashi | city | Nagano | Japan | 36.09 | 138.48 | 2896 | 5871 |
| Mariko | city | Nagano | Japan | 36.32 | 138.27 | 2509 | 38911 |
| Maruko | city | Nagano | Japan | 36.32 | 138.27 | 2509 | 38911 |
| Mashino | city | Nagano | Japan | 36.02 | 138.09 | 2595 | 55897 |
| Matsubara | city | Nagano | Japan | 36.05 | 138.46 | 3484 | 4264 |
| Matsushima | city | Nagano | Japan | 35.90 | 137.98 | 2509 | 40341 |
| Matsushiro | city | Nagano | Japan | 36.57 | 138.20 | 1184 | 89615 |
| Matsushiromachi-higashijo | city | Nagano | Japan | 36.56 | 138.22 | 1669 | 74189 |
| Matsushiromachi-jōtō | city | Nagano | Japan | 36.57 | 138.20 | 1184 | 89615 |
| Midarehashi | city | Nagano | Japan | 36.38 | 138.01 | 2700 | 7606 |
| Midogaito | city | Nagano | Japan | 35.92 | 138.10 | 3349 | 5381 |
| Midokaito | city | Nagano | Japan | 35.92 | 138.10 | 3349 | 5381 |
| Midono | city | Nagano | Japan | 35.60 | 137.62 | 2509 | 2677 |
| Mikage-shinden | city | Nagano | Japan | 36.30 | 138.46 | 2509 | 55687 |
| Minami Otari | city | Nagano | Japan | 36.76 | 137.91 | 2624 | 4867 |
| Minami Otari | city | Nagano | Japan | 36.77 | 137.90 | 1968 | 4547 |
| Minami-ichi | city | Nagano | Japan | 36.63 | 138.20 | 1151 | 124371 |
| Minami-majino | city | Nagano | Japan | 36.00 | 138.10 | 3362 | 43993 |
| Minami-mashino | city | Nagano | Japan | 36.00 | 138.10 | 3362 | 43993 |
| Minami-nagae | city | Nagano | Japan | 36.79 | 138.30 | 1669 | 23371 |
| Minami-otsuma | city | Nagano | Japan | 36.23 | 137.89 | 2080 | 68790 |
| Minami-ōzuma | city | Nagano | Japan | 36.23 | 137.89 | 2080 | 68790 |
| Minamigodo | city | Nagano | Japan | 36.39 | 137.85 | 1919 | 29458 |
| Minamijō | city | Nagano | Japan | 36.43 | 138.20 | 1968 | 56394 |
| Minamikomatsuo | city | Nagano | Japan | 36.47 | 137.99 | 2831 | 5486 |
| Minamimajino | city | Nagano | Japan | 36.01 | 138.10 | 2621 | 49900 |
| Minaminagae | city | Nagano | Japan | 36.79 | 138.30 | 1669 | 23371 |
| Minaminagano | city | Nagano | Japan | 36.65 | 138.18 | 1220 | 123580 |
| Minamiogura | city | Nagano | Japan | 36.26 | 137.84 | 2509 | 31029 |
| Minamiwada | city | Nagano | Japan | 36.20 | 137.91 | 2073 | 89816 |
| Minamiōzuma | city | Nagano | Japan | 36.23 | 137.89 | 2080 | 68790 |
| Minato | city | Nagano | Japan | 36.04 | 138.06 | 2526 | 69819 |
| Minochi | city | Nagano | Japan | 36.59 | 138.04 | 1669 | 18190 |
| Misayama-kodo | city | Nagano | Japan | 35.93 | 138.22 | 3349 | 17922 |
| Misayamagodo | city | Nagano | Japan | 35.93 | 138.22 | 3349 | 17922 |
| Mishayamagōdo | city | Nagano | Japan | 35.93 | 138.22 | 3349 | 17922 |
| Mitsukuri | city | Nagano | Japan | 36.98 | 138.54 | 879 | 2072 |
| Mitsushima | city | Nagano | Japan | 35.27 | 137.85 | 2509 | 2110 |
| Miura | city | Nagano | Japan | 35.82 | 137.40 | 5049 | 847 |
| Miwa | city | Nagano | Japan | 36.66 | 138.21 | 1174 | 121936 |
| Miyada | city | Nagano | Japan | 35.77 | 137.95 | 1968 | 37891 |
| Miyada-mura | city | Nagano | Japan | 35.77 | 137.95 | 1968 | 37891 |
| Miyaki | city | Nagano | Japan | 35.98 | 137.98 | 2509 | 24052 |
| Miyanokoshi | city | Nagano | Japan | 35.88 | 137.77 | 3526 | 4674 |
| Miyata | city | Nagano | Japan | 35.77 | 137.95 | 1968 | 37891 |
| Mizuho-toyo | city | Nagano | Japan | 36.92 | 138.41 | 1669 | 13946 |
| Mizukami | city | Nagano | Japan | 36.35 | 138.04 | 3349 | 7149 |
| Mochitsuki | city | Nagano | Japan | 36.27 | 138.37 | 2509 | 16754 |
| Mochitzuki | city | Nagano | Japan | 36.27 | 138.37 | 2509 | 16754 |
| Mochizuki | city | Nagano | Japan | 36.27 | 138.37 | 2509 | 16754 |
| Modai | city | Nagano | Japan | 36.27 | 138.33 | 2601 | 8054 |
| Momooka | city | Nagano | Japan | 36.00 | 137.85 | 4189 | 5942 |
| Momose | city | Nagano | Japan | 36.18 | 137.97 | 2509 | 101780 |
| Momoyama | city | Nagano | Japan | 35.72 | 137.72 | 3349 | 2844 |
| Motae | city | Nagano | Japan | 36.27 | 138.33 | 2601 | 8054 |
| Motai | city | Nagano | Japan | 36.27 | 138.33 | 2601 | 8054 |
| Motoyama | city | Nagano | Japan | 36.06 | 137.90 | 2736 | 19943 |
| Motsutsuki | city | Nagano | Japan | 36.27 | 138.37 | 2509 | 16754 |
| Murai | city | Nagano | Japan | 36.18 | 137.96 | 2509 | 96891 |
| Muraimachi | city | Nagano | Japan | 36.18 | 137.96 | 2509 | 96891 |
| Muraimachi-minami | city | Nagano | Japan | 36.18 | 137.96 | 2509 | 96891 |
| Mure | city | Nagano | Japan | 36.75 | 138.24 | 1751 | 27405 |
| Murei | city | Nagano | Japan | 36.75 | 138.24 | 1751 | 27405 |
| Muromachi | city | Nagano | Japan | 36.24 | 137.86 | 2509 | 38355 |
| Mushiu | city | Nagano | Japan | 36.96 | 138.45 | 1669 | 9804 |