Otsuki (大月市)

City

Yamanashi (山梨) — 2025 — Based on Basic Resident Register

Total Population

21,314

-428 (-1.97%)

Young (0–14)

6.7%

1,435

Working Age (15–64)

49.8%

10,606

Aging Rate

43.5%

9,273

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	21,314	10,534	10,780
Young (0–14)	1,435	702	733
Working Age (15–64)	10,606	5,633	4,973
Elderly (65+)	9,273	4,199	5,074

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	21,314	1,435	10,606	9,273	43.5%
2024	21,742	1,512	10,967	9,263	42.6%
2023	22,204	1,565	11,335	9,304	41.9%
2022	22,629	1,622	11,603	9,404	41.6%
2021	23,183	1,725	12,069	9,389	40.5%
2020	23,755	1,832	12,535	9,388	39.5%
2019	24,289	1,924	13,058	9,307	38.3%
2018	24,928	2,026	13,643	9,259	37.1%
2017	25,483	2,114	14,209	9,160	35.9%
2016	25,994	2,244	14,697	9,053	34.8%
2015	26,496	2,360	15,249	8,887	33.5%
2014	27,116	2,486	15,953	8,677	32.0%
2013	27,537	2,603	16,347	8,587	31.2%
2012	27,960	2,753	16,818	8,389	30.0%
2011	28,346	2,851	17,162	8,333	29.4%
2010	28,911	3,029	17,481	8,401	29.1%
2009	29,517	3,261	17,858	8,398	28.5%
2008	29,987	3,418	18,331	8,238	27.5%
2007	30,552	3,640	18,744	8,168	26.7%
2006	30,940	3,774	19,127	8,039	26.0%
2005	31,405	3,936	19,510	7,959	25.3%
2004	31,805	4,055	19,859	7,891	24.8%
2003	32,221	4,253	20,161	7,807	24.2%
2002	32,578	4,495	20,467	7,616	23.4%
2001	32,927	4,631	20,747	7,549	22.9%
2000	33,344	4,832	21,171	7,341	22.0%
1999	33,763	5,058	21,504	7,201	21.3%
1998	34,107	5,256	21,834	7,017	20.6%
1997	34,367	5,387	22,137	6,843	19.9%
1996	34,629	5,539	22,470	6,620	19.1%
1995	34,703	5,678	22,585	6,440	18.6%