일본 인구 감소 시뮬레이터

Kochi高知県

Niyodogawa 仁淀川町

Data last updated:

Niyodogawa, Kochi, Japan has a population of 4,824 (2020 national census). IPSS projections estimate 3,548 by 2030 and 1,821 by 2050 (a decrease of about 62.3% from 2020), with the share of residents aged 65+ rising from 55.7% to 61.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2020년

(실적)

4,824명

2030년

(추계)

3,548명

▼ -26.5%

2040년

(추계)

2,559명

▼ -47.0%

2050년

(추계)

1,821명

▼ -62.3%

고령화율（65세 이상）: 2020년 55.7%→2050년 61.1%

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데이터 출처

  • 일본 정부 통계 종합 포털(e-Stat)（https://www.e-stat.go.jp/）
  • 국립사회보장・인구문제연구소 「일본의 지역별 장래추계인구(레이와 5년 추계)」

※이 서비스는 e-Stat의 API 기능을 사용하고 있으나 서비스 내용은 일본 정부에 의해 보증된 것이 아닙니다.

Niyodogawa Population Projection Table (2020–2050)

Population by year, based on the national census and IPSS (2023) projections.

YearPopulationvs 2020Type
20204,824—Census
20254,147▼ -14.0%Projection
20303,548▼ -26.5%Projection
20353,014▼ -37.5%Projection
20402,559▼ -47.0%Projection
20452,164▼ -55.1%Projection
20501,821▼ -62.3%Projection

About Niyodogawa

Overview

Niyodogawa (仁淀川町) is a municipality in Kochi, Japan, with a population of 4,824 as of 2020.

Population Projection of Niyodogawa

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Niyodogawa's population is expected to reach 3,548 by 2030 (-26.5%), 2,559 by 2040 (-47.0%), and 1,821 by 2050 (-62.3%). The town is projected to lose more than half its population over 30 years.

Aging Rate of Niyodogawa

The aging rate (percentage of residents aged 65 and over) is 55.7% as of 2020 and is projected to rise to 61.1% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.

National Comparison

Niyodogawa is among the most rapidly declining municipalities in Japan.

National and Prefectural Rank

  • Population decline rate: Ranked #43 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #81 out of 1903 nationwide.
  • Population size: Ranked #1637 out of 1916 nationwide.
  • Related: National rankings / All municipalities in Kochi

Frequently Asked Questions

Q.What is the current population of Niyodogawa, Kochi?
A.According to the 2020 national census, Niyodogawa has a population of 4,824.
Q.What is the population of Niyodogawa in 2026?
A.Niyodogawa's population in 2026 is estimated at approximately 4,027. This is an interpolated reference value between the 2020 census (4,824) and the IPSS projection for 2030 (3,548).
Q.What is the projected population of Niyodogawa in the future?
A.According to IPSS projections, Niyodogawa's population is expected to be 3,548 in 2030, 2,559 in 2040, and 1,821 in 2050.
Q.What is the population decline rate of Niyodogawa?
A.Over the 30 years from 2020 to 2050, Niyodogawa's population is projected to change by -62.3%. The 10-year change is -26.5% and the 20-year change is -47.0%.
Q.Why is the population of Niyodogawa declining?
A.Nationwide, Japan's population decline is driven by natural decrease (deaths exceeding births) and, in regional municipalities, by net out-migration of young people to major metropolitan areas. In Niyodogawa, the share of residents aged 65+ is projected to rise from 55.7% to 61.1% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Niyodogawa?
A.Niyodogawa's aging rate (percentage aged 65 and over) is 55.7% as of 2020, projected to rise to 61.1% by 2050.
Q.Where does this population data come from?
A.Historical data is sourced from Japan's national census via the e-Stat API (Statistics Bureau of Japan). Future projections are from the National Institute of Population and Social Security Research (IPSS) "Regional Population Projections 2023".
Q.Is the data up to date?
A.Historical data uses the 2020 national census results. Future projections use the IPSS 2023 edition. Data will be updated as new census results become available.

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