KODACHI / LAND, LIFE & EVIDENCE
Population and households in Okinawa and Tokyo: reading beyond averages
Population and household counts tell different stories. Between the 1990 and 2020 censuses, households grew faster than population in both prefectures; population alone misses changes in housing use.
A framework for the decision
- 01Long-term population
- 02Household composition
- 03Living areas and housing
Editorial diagram. Confirm the sequence and responsibilities for the individual project.
01 / INSIGHT
Use a common 30-year window
Okinawa’s population changed from 1,222,398 to 1,467,480, and total households from 368,295 to 614,708. Tokyo changed from 11,855,563 to 14,047,594 people and 4,785,406 to 7,227,180 total households. Charts index 1990 to 100 so scale does not conceal relative change.
EVIDENCE / 20
Compare the evidence
Censuses 1990–2020, October 1 every five years. Total population and total households, not general households. Historical indices (1990=100), not current population estimates.
Charts and tables can be scrolled horizontally.
Total population · Index (1990=100)
Total households · Index (1990=100)
View the data table
| Year | Okinawa / Total population | Tokyo / Total population | Okinawa / Total households | Tokyo / Total households |
|---|---|---|---|---|
| 1990 | 1,222,398 | 11,855,563 | 368,295 | 4,785,406 |
| 1995 | 1,273,440 | 11,773,605 | 404,253 | 4,998,492 |
| 2000 | 1,318,220 | 12,064,101 | 446,286 | 5,423,551 |
| 2005 | 1,361,594 | 12,576,601 | 488,368 | 5,890,792 |
| 2010 | 1,392,818 | 13,159,388 | 520,191 | 6,393,768 |
| 2015 | 1,433,566 | 13,515,271 | 560,424 | 6,701,122 |
| 2020 | 1,467,480 | 14,047,594 | 614,708 | 7,227,180 |
Chart compiled from the cited original tables. Values are available below and in the CSV.
02 / INSIGHT
Move from prefectures to neighborhoods
Growing prefectural households do not mean equal demand in every town or dwelling type. Examine age, household composition, transport, work and schools at municipal level. Keep residential demand separate from travel demand.
03 / INSIGHT
Keep population sources consistent
Census, resident-register and estimated populations use different methods. This chart uses seven censuses at five-year intervals, 1990–2020, not the latest population. Total and general households are different categories. Preliminary 2025 figures are not mixed into this historical chart.
Before the consultation
| Item | What to establish |
|---|---|
| Coverage | Use total population and total households consistently. |
| Date | Census observations on October 1 at five-year intervals. |
| Geography | Narrow from prefecture to municipality and living area. |
Sources and authorities
Original publications are in Japanese. Confirm property-specific conditions with the responsible authority.
Continue your research
Buying property in Okinawa and Tokyo: what changes in the investigation
Apply the common legal and documentary checks first, then vary the investigation to suit the property. Vacant villa land and an operating accommodation building require different evidence.
21 / GUIDEUsing land, population and tourism data in a property comparison
Record what a number measures, its geography and period, and its relevance to the property. An explicit unresolved column prevents assumptions becoming apparent facts.
24 / GUIDEPreparing to live in Okinawa: shopping, healthcare, education and transport
Move beyond what felt convenient on holiday. Investigate weekly and monthly activities at the times your household would actually use them.