Prefecture
The population development of Kochi Prefecture according to census results.
| Name | Abbr. | Status | Native | Capital | Area A-L (km²) | Population Census (Cf) 1995-10-01 | Population Census (Cf) 2000-10-01 | Population Census (Cf) 2005-10-01 | Population Census (Cf) 2010-10-01 | Population Census (Cf) 2015-10-01 | Population Census (Cf) 2020-10-01 | Population Census (Cp) 2025-10-01 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kōchi | 39 | Pref | 高知県 | Kōchi | 7,102 | 816,704 | 813,949 | 796,292 | 764,456 | 728,276 | 691,527 | 643,437 | 710200 | → |
| Japan | JPN | 日本国 | Tōkyō | 377,980 | 125,570,246 | 126,925,843 | 127,767,994 | 128,057,352 | 127,094,745 | 126,146,099 | 123,049,524 | → |
- Statistics Bureau Japan.
Major Cities
| Name | Population Census (Cp) 2025-10-01 | |
|---|---|---|
| 1 | Kōchi | 309,383 |
| 2 | Nankoku | 45,413 |
| 3 | Kōnan | 31,293 |
| 4 | Shimanto | 30,502 |
Contents: Cities & Towns
The population of all cities and towns of Kochi Prefecture with more than 20,000 inhabitants according to census results.
| Name | Status | Native | Population Census (Cf) 1995-10-01 | Population Census (Cf) 2000-10-01 | Population Census (Cf) 2005-10-01 | Population Census (Cf) 2010-10-01 | Population Census (Cf) 2015-10-01 | Population Census (Cf) 2020-10-01 | Population Census (Cp) 2025-10-01 | Area | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aki | City | 安芸市 | 22,377 | 21,321 | 20,348 | 19,547 | 17,577 | 16,243 | 14,625 | 31716 | → |
| Ino | Town | いの町 | 30,079 | 28,729 | 27,068 | 25,062 | 22,767 | 21,374 | 19,690 | 47097 | → |
| Kami (Tosayamada) | City | 香美市 | 31,023 | 31,175 | 30,257 | 28,766 | 27,513 | 26,513 | 24,423 | 53786 | → |
| Kōchi | City | 高知市 | 339,864 | 348,979 | 348,990 | 343,393 | 337,190 | 326,545 | 309,383 | 30900 | → |
| Kōnan (Noichi) | City | 香南市 | 31,481 | 32,659 | 33,541 | 33,830 | 32,961 | 32,207 | 31,293 | 12646 | → |
| Nankoku | City | 南国市 | 48,245 | 49,965 | 50,758 | 49,472 | 47,982 | 46,664 | 45,413 | 12530 | → |
| Shimanto (Kubokawa) | Town | 四万十町 | 23,081 | 21,844 | 20,527 | 18,712 | 17,325 | 15,607 | 13,855 | 64228 | → |
| Shimanto (Nakamura) | City | 四万十市 | 38,991 | 38,784 | 37,917 | 35,933 | 34,313 | 32,694 | 30,502 | 63232 | → |
| Sukumo | City | 宿毛市 | 25,919 | 25,970 | 24,397 | 22,610 | 20,907 | 19,033 | 17,239 | 28614 | → |
| Susaki | City | 須崎市 | 28,742 | 27,569 | 26,039 | 24,698 | 22,606 | 20,590 | 18,310 | 13520 | → |
| Tosa | City | 土佐市 | 30,723 | 30,338 | 30,011 | 28,686 | 27,038 | 25,732 | 23,839 | 9150 | → |
- Statistics Bureau Japan.
Population Structure
Further information about the population structure.
| Gender (C 2025) | |
|---|---|
| Males | 304,171 |
| Females | 339,266 |
| Age Groups (C 2020) | |
|---|---|
| 0-17 years | 93,701 |
| 18-64 years | 343,445 |
| 65+ years | 241,787 |
| Age Distribution (C 2020) | |
|---|---|
| 90+ years | 21,580 |
| 80-89 years | 63,766 |
| 70-79 years | 104,537 |
| 60-69 years | 96,995 |
| 50-59 years | 83,560 |
| 40-49 years | 90,551 |
| 30-39 years | 63,702 |
| 20-29 years | 49,897 |
| 10-19 years | 57,003 |
| 0-9 years | 47,342 |
| Citizenship (C 2020) | |
|---|---|
| Japan | 677,762 |
| Foreign Citizenship | 4,220 |