Otoyo (大豊町)

Town

Kochi (高知) — 2025 — Based on Basic Resident Register

Total Population

2,961

-134 (-4.33%)

Young (0–14)

5.5%

164

Working Age (15–64)

33.8%

1,000

Aging Rate

60.7%

1,797

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	2,961	1,386	1,575
Young (0–14)	164	87	77
Working Age (15–64)	1,000	530	470
Elderly (65+)	1,797	769	1,028

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	2,961	164	1,000	1,797	60.7%
2024	3,095	174	1,018	1,856	60.0%
2023	3,223	182	1,088	1,911	59.3%
2022	3,342	177	1,149	1,977	59.2%
2021	3,418	180	1,199	2,000	58.5%
2020	3,543	179	1,271	2,055	58.0%
2019	3,693	186	1,374	2,090	56.6%
2018	3,817	183	1,459	2,137	56.0%
2017	4,044	189	1,533	2,291	56.7%
2016	4,199	200	1,624	2,342	55.8%
2015	4,349	205	1,721	2,388	54.9%
2014	4,489	211	1,824	2,417	53.8%
2013	4,626	211	1,919	2,453	53.0%
2012	4,744	235	2,007	2,502	52.7%
2011	4,861	240	2,035	2,586	53.2%
2010	5,009	258	2,089	2,662	53.1%
2009	5,161	287	2,169	2,705	52.4%
2008	5,315	307	2,256	2,752	51.8%
2007	5,486	329	2,356	2,801	51.1%
2006	5,665	356	2,486	2,823	49.8%
2005	5,851	373	2,581	2,897	49.5%
2004	6,005	408	2,679	2,918	48.6%
2003	6,193	438	2,812	2,943	47.5%
2002	6,367	493	2,936	2,938	46.1%
2001	6,525	527	3,048	2,950	45.2%
2000	6,650	567	3,149	2,934	44.1%
1999	6,776	589	3,276	2,911	43.0%
1998	6,895	626	3,418	2,851	41.3%
1997	7,022	665	3,579	2,778	39.6%
1996	7,213	711	3,775	2,727	37.8%
1995	7,323	728	3,930	2,665	36.4%