Ibaraki茨城県
Tsukuba つくば市
Data last updated:
Tsukuba, Ibaraki, Japan has a population of 268,832 (2025 national census). IPSS projections estimate 258,539 by 2030 and 256,124 by 2050 (an increase of about 6.0% from 2020), with the share of residents aged 65+ rising from 19.8% in 2020 to 30.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
268,832
2030
(Projection)
258,539
▲ +7.0%
2040
(Projection)
260,559
▲ +7.8%
2050
(Projection)
256,124
▲ +6.0%
Change vs. 2020 census
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Other municipalities in Ibaraki (茨城県)
Data Sources
- Portal Site of Official Statistics of Japan (e-Stat)（https://www.e-stat.go.jp/）
- National Institute of Population and Social Security Research (IPSS), Regional Population Projections (2023 ed.)
* This service uses the e-Stat API but its content is not guaranteed by the Japanese government.
Tsukuba Population Table (1980–2050)
Population by year: national census results (restated to current municipal boundaries) and IPSS (2023) projections based on the 2020 census.
| Year | Population | vs 2020 | Type |
|---|---|---|---|
| 1980 | 127,402 | ▼ -47.3% | Census |
| 1985 | 150,074 | ▼ -37.9% | Census |
| 1990 | 168,466 | ▼ -30.3% | Census |
| 1995 | 182,327 | ▼ -24.6% | Census |
| 2000 | 191,814 | ▼ -20.6% | Census |
| 2005 | 200,528 | ▼ -17.0% | Census |
| 2010 | 214,590 | ▼ -11.2% | Census |
| 2015 | 226,963 | ▼ -6.1% | Census |
| 2020 | 241,656 | — | Census |
| 2025 | 268,832 | ▲ +11.2% | Census |
| 2030 | 258,539 | ▲ +7.0% | Projection |
| 2035 | 260,524 | ▲ +7.8% | Projection |
| 2040 | 260,559 | ▲ +7.8% | Projection |
| 2045 | 258,692 | ▲ +7.0% | Projection |
| 2050 | 256,124 | ▲ +6.0% | Projection |
About Tsukuba
Overview
Tsukuba (つくば市) is a municipality in Ibaraki, Japan, with a population of 268,832 as of 2025.
Population Projection of Tsukuba
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Tsukuba's population is expected to reach 258,539 by 2030 (+7.0%), 260,559 by 2040 (+7.8%), and 256,124 by 2050 (+6.0%). Tsukuba is among the rare Japanese municipalities projected to see population growth.
Aging Rate of Tsukuba
The aging rate (percentage of residents aged 65 and over) is 19.8% as of 2020 and is projected to rise to 30.4% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Tsukuba's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1863 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1821 out of 1903 nationwide.
- Population size: Ranked #106 out of 1917 nationwide.
- Related: National rankings / All municipalities in Ibaraki
Earnings in Ibaraki (茨城県): Average salary in Ibaraki (茨城県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure