| Source | UN (World Urbanization Prospects 2025) |
| Date | 09 Feb 2026 |
| Code | City | Population | Share (%) | Rank | Change | |||
|---|---|---|---|---|---|---|---|---|
| 2025 | 2026 | Japan | World | Population | (%) | |||
| Tōky | Tōkyō (Tokyo) | 33,412,512 | 33,338,852 | 27.1 | 1 | 3 | -73,660 | -0.22 |
| Osak | Osaka | 12,964,145 | 12,853,431 | 10.4 | 2 | 26 | -110,714 | -0.85 |
| Nago | Nagoya | 7,146,160 | 7,116,860 | 5.78 | 3 | 50 | -29,300 | -0.41 |
| Fuku | Fukuoka | 2,225,078 | 2,213,968 | 1.80 | 4 | 230 | -11,110 | -0.50 |
| Sapp | Sapporo | 1,964,519 | 1,956,655 | 1.59 | 5 | 256 | -7,864 | -0.40 |
| Send | Sendai | 1,256,440 | 1,249,258 | 1.01 | 6 | 411 | -7,182 | -0.57 |
| Kita | Kitakyushu | 1,206,731 | 1,200,468 | 0.975 | 7 | 433 | -6,263 | -0.52 |
| Hiro | Hiroshima | 1,185,788 | 1,177,860 | 0.957 | 8 | 440 | -7,928 | -0.67 |
| Naha | Naha | 1,060,017 | 1,059,406 | 0.861 | 9 | 487 | -611 | -0.06 |
| Nara | Nara | 993,952 | 983,529 | 0.799 | 10 | 529 | -10,423 | -1.05 |
| Okay | Okayama | 817,266 | 812,247 | 0.660 | 11 | 656 | -5,019 | -0.61 |
| Kuma | Kumamoto | 641,185 | 637,962 | 0.518 | 12 | 852 | -3,223 | -0.50 |
| Otsu | Otsu | 559,798 | 556,738 | 0.452 | 13 | 993 | -3,060 | -0.55 |
| Kana | Kanazawa | 533,682 | 529,944 | 0.430 | 14 | 1056 | -3,738 | -0.70 |
| Hime | Himeji | 494,064 | 491,150 | 0.399 | 15 | 1143 | -2,914 | -0.59 |
| Kago | Kagoshima | 484,164 | 481,412 | 0.391 | 16 | 1158 | -2,752 | -0.57 |
| Toyo | Toyohashi | 441,665 | 439,781 | 0.357 | 17 | 1281 | -1,884 | -0.43 |
| Mats | Matsuyama | 437,355 | 432,268 | 0.351 | 18 | 1306 | -5,087 | -1.16 |
| Taka | Takasaki [Maebashi] | 431,687 | 430,655 | 0.350 | 19 | 1310 | -1,032 | -0.24 |
| Niig | Niigata | 422,238 | 419,892 | 0.341 | 20 | 1355 | -2,346 | -0.56 |
| Numa | Numazu | 374,507 | 372,344 | 0.302 | 21 | 1548 | -2,163 | -0.58 |
| Oita | Oita | 372,190 | 370,329 | 0.301 | 22 | 1557 | -1,861 | -0.50 |
| Fuku | Fukuyama | 355,352 | 353,237 | 0.287 | 23 | 1630 | -2,115 | -0.60 |
| Utsu | Utsunomiya | 352,816 | 351,972 | 0.286 | 24 | 1641 | -844 | -0.24 |
| Taka | Takamatsu | 340,478 | 334,888 | 0.272 | 25 | 1733 | -5,590 | -1.64 |
| Yokk | Yokkaichi | 332,173 | 330,941 | 0.269 | 26 | 1750 | -1,232 | -0.37 |
| Shiz | Shizuoka | 328,613 | 326,639 | 0.265 | 27 | 1774 | -1,974 | -0.60 |
| Naga | Nagasaki | 308,986 | 307,358 | 0.250 | 28 | 1895 | -1,628 | -0.53 |
| Asah | Asahikawa | 298,481 | 297,109 | 0.241 | 29 | 1971 | -1,372 | -0.46 |
| Hama | Hamamatsu | 282,084 | 280,963 | 0.228 | 30 | 2083 | -1,121 | -0.40 |
| Kofu | Kofu | 280,212 | 275,080 | 0.223 | 31 | 2135 | -5,132 | -1.83 |
| Naga | Nagano | 270,476 | 268,908 | 0.218 | 32 | 2191 | -1,568 | -0.58 |
| Hako | Hakodate | 261,557 | 260,290 | 0.211 | 33 | 2269 | -1,267 | -0.48 |
| Waka | Wakayama | 255,782 | 252,610 | 0.205 | 34 | 2339 | -3,172 | -1.24 |
| Ota | Ota | 237,865 | 237,269 | 0.193 | 35 | 2503 | -596 | -0.25 |
| Kori | Koriyama | 225,981 | 224,623 | 0.182 | 36 | 2647 | -1,358 | -0.60 |
| Mori | Morioka | 226,202 | 224,106 | 0.182 | 37 | 2655 | -2,096 | -0.93 |
| Akit | Akita | 225,217 | 223,644 | 0.182 | 38 | 2659 | -1,573 | -0.70 |
| Toya | Toyama | 224,491 | 222,926 | 0.181 | 39 | 2676 | -1,565 | -0.70 |
| Miya | Miyazaki | 219,947 | 218,820 | 0.178 | 40 | 2731 | -1,127 | -0.51 |
| Koch | Kochi | 218,972 | 217,547 | 0.177 | 41 | 2757 | -1,425 | -0.65 |
| Tsuc | Tsuchiura | 205,004 | 203,659 | 0.165 | 42 | 2963 | -1,345 | -0.66 |
| Fuku | Fukui | 201,467 | 200,084 | 0.163 | 43 | 3026 | -1,383 | -0.69 |
| Aomo | Aomori | 194,917 | 192,824 | 0.157 | 44 | 3159 | -2,093 | -1.07 |
| Mito | Mito | 189,060 | 188,315 | 0.153 | 45 | 3240 | -745 | -0.39 |
| Toku | Tokushima | 188,589 | 185,599 | 0.151 | 46 | 3288 | -2,990 | -1.59 |
| Fuku | Fukushima | 182,893 | 180,669 | 0.147 | 47 | 3377 | -2,224 | -1.22 |
| Mats | Matsumoto | 180,139 | 179,040 | 0.145 | 48 | 3419 | -1,099 | -0.61 |
| Kisa | Kisarazu | 176,379 | 176,000 | 0.143 | 49 | 3478 | -379 | -0.21 |
| Kuru | Kurume | 174,358 | 173,468 | 0.141 | 50 | 3534 | -890 | -0.51 |
| Yama | Yamagata | 173,585 | 172,566 | 0.140 | 51 | 3555 | -1,019 | -0.59 |
| Naga | Nagaoka | 154,939 | 153,659 | 0.125 | 52 | 3992 | -1,280 | -0.83 |
| Taka | Takaoka | 154,464 | 153,600 | 0.125 | 53 | 3995 | -864 | -0.56 |
| Hach | Hachinohe | 151,565 | 150,687 | 0.122 | 54 | 4080 | -878 | -0.58 |
| Obih | Obihiro | 149,349 | 148,618 | 0.121 | 55 | 4134 | -731 | -0.49 |
| Shun | Shunan | 146,751 | 145,916 | 0.119 | 56 | 4229 | -835 | -0.57 |
| Kush | Kushiro | 147,096 | 145,021 | 0.118 | 57 | 4253 | -2,075 | -1.41 |
| Hita | Hitachi | 142,850 | 142,510 | 0.116 | 58 | 4325 | -340 | -0.24 |
| Sase | Sasebo | 142,668 | 141,892 | 0.115 | 59 | 4340 | -776 | -0.54 |
| Maru | Marugame | 143,185 | 141,716 | 0.115 | 60 | 4345 | -1,469 | -1.03 |
| Ube | Ube | 143,910 | 139,481 | 0.113 | 61 | 4414 | -4,429 | -3.08 |
| Omut | Omuta | 142,814 | 136,264 | 0.111 | 62 | 4520 | -6,550 | -4.59 |
| 小名浜愛 | 小名浜愛宕上 | 136,419 | 136,111 | 0.111 | 63 | 4530 | -308 | -0.23 |
| Tsu | Tsu | 130,949 | 130,483 | 0.106 | 64 | 4738 | -466 | -0.36 |
| Toma | Tomakomai | 129,747 | 129,157 | 0.105 | 65 | 4798 | -590 | -0.45 |
| Kiry | Kiryu | 129,126 | 128,813 | 0.105 | 66 | 4812 | -313 | -0.24 |
| Saga | Saga | 123,371 | 122,707 | 0.0997 | 67 | 5069 | -664 | -0.54 |
| Tott | Tottori | 121,673 | 121,060 | 0.0983 | 68 | 5141 | -613 | -0.50 |
| Fuji | Fujieda | 122,203 | 120,703 | 0.0981 | 69 | 5155 | -1,500 | -1.23 |
| Hiro | Hirosaki | 121,888 | 120,552 | 0.0979 | 70 | 5165 | -1,336 | -1.10 |
| Mats | Matsue | 111,436 | 110,880 | 0.0901 | 71 | 5635 | -556 | -0.50 |
| Bepp | Beppu | 111,770 | 110,869 | 0.0901 | 72 | 5636 | -901 | -0.81 |
| Yona | Yonago | 109,276 | 108,719 | 0.0883 | 73 | 5754 | -557 | -0.51 |
| Ishi | Ishinomaki | 106,286 | 105,624 | 0.0858 | 74 | 5923 | -662 | -0.62 |
| Suzu | Suzuka | 105,292 | 104,884 | 0.0852 | 75 | 5962 | -408 | -0.39 |