Kuji (久慈市)

City

Iwate (岩手) — 2025 — Based on Basic Resident Register

Total Population

31,216

-784 (-2.45%)

Young (0–14)

9.5%

2,961

Working Age (15–64)

54.0%

16,851

Aging Rate

36.5%

11,404

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	31,216	15,085	16,131
Young (0–14)	2,961	1,545	1,416
Working Age (15–64)	16,851	8,624	8,227
Elderly (65+)	11,404	4,916	6,488

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	31,216	2,961	16,851	11,404	36.5%
2024	32,000	3,183	17,395	11,422	35.7%
2023	32,645	3,358	17,853	11,434	35.0%
2022	33,344	3,569	18,323	11,452	34.3%
2021	34,094	3,747	18,994	11,353	33.3%
2020	34,696	3,892	19,523	11,281	32.5%
2019	35,199	4,066	19,984	11,149	31.7%
2018	35,678	4,247	20,409	11,022	30.9%
2017	36,141	4,382	20,898	10,861	30.1%
2016	36,722	4,533	21,455	10,734	29.2%
2015	37,103	4,665	21,897	10,541	28.4%
2014	37,488	4,820	22,411	10,257	27.4%
2013	37,440	4,874	22,498	10,068	26.9%
2012	37,488	5,009	22,652	9,827	26.2%
2011	37,979	5,157	23,058	9,764	25.7%
2010	38,264	5,282	23,167	9,815	25.7%
2009	38,569	5,445	23,413	9,711	25.2%
2008	39,009	5,616	23,817	9,576	24.5%
2007	39,525	5,794	24,271	9,460	23.9%
2006	40,226	6,068	24,782	9,376	23.3%
2005	37,190	5,863	23,223	8,104	21.8%
2004	37,643	6,062	23,557	8,024	21.3%
2003	37,847	6,234	23,766	7,847	20.7%
2002	37,902	6,316	23,982	7,604	20.1%
2001	37,944	6,402	24,184	7,358	19.4%
2000	38,083	6,517	24,464	7,102	18.6%
1999	38,207	6,667	24,716	6,824	17.9%
1998	38,294	6,856	24,850	6,588	17.2%
1997	38,474	7,058	25,059	6,357	16.5%
1996	38,629	7,249	25,216	6,164	16.0%
1995	38,801	7,508	25,390	5,903	15.2%