Kosaka (小坂町)

Town

Akita (秋田) — 2025 — Based on Basic Resident Register

Total Population

4,421

-129 (-2.84%)

Young (0–14)

6.8%

299

Working Age (15–64)

46.6%

2,060

Aging Rate

45.7%

2,020

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	4,421	2,058	2,363
Young (0–14)	299	160	139
Working Age (15–64)	2,060	1,070	990
Elderly (65+)	2,020	802	1,218

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	4,421	299	2,060	2,020	45.7%
2024	4,550	321	2,163	2,066	45.4%
2023	4,688	341	2,172	2,130	45.4%
2022	4,794	356	2,236	2,164	45.1%
2021	4,879	358	2,301	2,180	44.7%
2020	4,995	372	2,388	2,197	44.0%
2019	5,114	401	2,481	2,214	43.3%
2018	5,235	422	2,567	2,238	42.8%
2017	5,366	455	2,628	2,272	42.3%
2016	5,489	465	2,729	2,285	41.6%
2015	5,662	522	2,816	2,314	40.9%
2014	5,798	550	2,955	2,284	39.4%
2013	5,868	570	3,005	2,283	38.9%
2012	5,977	592	3,122	2,263	37.9%
2011	6,079	604	3,217	2,258	37.1%
2010	6,161	624	3,261	2,276	36.9%
2009	6,251	662	3,293	2,296	36.7%
2008	6,420	692	3,420	2,308	36.0%
2007	6,593	738	3,538	2,317	35.1%
2006	6,742	774	3,659	2,309	34.2%
2005	6,845	794	3,770	2,281	33.3%
2004	6,935	807	3,860	2,268	32.7%
2003	7,021	824	3,960	2,237	31.9%
2002	7,077	829	4,027	2,221	31.4%
2001	7,224	849	4,206	2,169	30.0%
2000	7,351	883	4,345	2,123	28.9%
1999	7,455	906	4,460	2,089	28.0%
1998	7,578	946	4,581	2,051	27.1%
1997	7,675	976	4,706	1,993	26.0%
1996	7,750	986	4,820	1,944	25.1%
1995	7,809	1,007	4,930	1,872	24.0%