Ichihara (市原市)

City

Chiba (千葉) — 2025 — Based on Basic Resident Register

Total Population

266,861

-1,656 (-0.62%)

Young (0–14)

10.2%

27,294

Working Age (15–64)

58.9%

157,061

Aging Rate

30.9%

82,506

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	266,861	137,547	129,314
Young (0–14)	27,294	14,034	13,260
Working Age (15–64)	157,061	84,889	72,172
Elderly (65+)	82,506	38,624	43,882

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	266,861	27,294	157,061	82,506	30.9%
2024	268,517	28,318	157,777	82,422	30.7%
2023	270,085	29,200	158,736	82,149	30.4%
2022	271,740	29,985	159,929	81,824	30.1%
2021	273,771	30,921	161,932	80,916	29.6%
2020	275,385	31,610	164,069	79,704	28.9%
2019	276,739	32,336	165,936	78,465	28.4%
2018	277,707	32,927	168,029	76,748	27.6%
2017	279,093	33,586	170,707	74,798	26.8%
2016	279,697	33,966	173,069	72,660	26.0%
2015	280,340	34,511	175,574	70,253	25.1%
2014	281,043	34,974	178,912	67,155	23.9%
2013	281,642	35,362	181,367	64,911	23.0%
2012	278,276	35,538	181,446	61,292	22.0%
2011	278,841	36,020	183,890	58,931	21.1%
2010	279,629	36,574	185,319	57,736	20.6%
2009	279,753	37,165	186,960	55,628	19.9%
2008	279,957	37,711	189,294	52,952	18.9%
2007	279,935	38,232	191,580	50,123	17.9%
2006	280,178	38,777	193,950	47,451	16.9%
2005	280,238	39,438	195,703	45,097	16.1%
2004	280,579	39,913	197,582	43,084	15.4%
2003	280,501	40,618	198,731	41,152	14.7%
2002	280,313	41,269	199,969	39,075	13.9%
2001	279,749	41,860	200,633	37,256	13.3%
2000	279,405	42,695	201,445	35,265	12.6%
1999	279,713	43,897	202,248	33,568	12.0%
1998	279,409	44,924	202,361	32,124	11.5%
1997	278,424	45,956	201,962	30,506	11.0%
1996	277,469	47,085	201,406	28,978	10.4%
1995	276,215	48,040	200,648	27,527	10.0%