Tsukuba (つくば市)

City

Ibaraki (茨城) — 2025 — Based on Basic Resident Register

Total Population

259,000

+3,756 (1.47%)

Young (0–14)

15.3%

39,572

Working Age (15–64)

65.5%

169,591

Aging Rate

19.2%

49,837

Population Trends (1995–2025)

* Data before 2012 includes Japanese residents only (foreign residents were added to the Basic Resident Register in July 2012)

Category	Total	Male	Female
Total	259,000	131,664	127,336
Young (0–14)	39,572	20,428	19,144
Working Age (15–64)	169,591	88,528	81,063
Elderly (65+)	49,837	22,708	27,129

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	259,000	39,572	169,591	49,837	19.2%
2024	255,244	39,429	166,887	48,928	19.2%
2023	252,202	39,184	164,807	48,211	19.1%
2022	246,541	38,558	160,293	47,690	19.3%
2021	241,809	37,945	157,020	46,844	19.4%
2020	237,653	37,230	154,691	45,732	19.2%
2019	233,807	36,662	152,355	44,790	19.2%
2018	230,360	36,020	150,494	43,846	19.0%
2017	227,127	35,489	148,986	42,652	18.8%
2016	223,755	34,855	147,648	41,252	18.4%
2015	220,622	34,329	146,549	39,744	18.0%
2014	218,864	34,062	146,934	37,868	17.3%
2013	216,064	33,807	145,575	36,682	17.0%
2012	207,147	34,621	140,317	32,209	15.5%
2011	205,993	32,501	140,114	33,378	16.2%
2010	203,116	31,870	138,431	32,815	16.2%
2009	200,555	31,599	137,135	31,821	15.9%
2008	197,837	31,134	136,271	30,432	15.4%
2007	194,740	30,613	134,737	29,390	15.1%
2006	191,750	30,185	133,373	28,192	14.7%
2005	188,391	29,829	131,345	27,217	14.4%
2004	186,674	29,858	130,300	26,516	14.2%
2003	184,876	29,682	129,349	25,845	14.0%
2002	157,980	26,849	109,808	21,323	13.5%
2001	156,562	26,818	108,948	20,796	13.3%
2000	155,185	26,935	108,132	20,118	13.0%
1999	153,904	27,100	107,200	19,604	12.7%
1998	152,323	27,253	105,908	19,162	12.6%
1997	150,351	27,297	104,447	18,607	12.4%
1996	148,468	27,247	103,295	17,926	12.1%
1995	146,813	27,310	102,170	17,333	11.8%