Among six major cities, household-income figures for people aged 30–39 are published for only three: about ¥9.75 million in Kawasaki, about ¥9.15 million in Sagamihara, and about ¥6.84 million in Tokyo's 23 wards. The numbers are striking, but this is only a provisional comparison of the three cities with published data and cannot be treated as a definitive six-city ranking.
Household income for ages 30–39 (2019, households with 2+ members)
| City | Annual income, ages 30–39 (¥1,000) | Annual income | Note |
|---|---|---|---|
| Kawasaki | 9,752 | About ¥9.75 million | Published |
| Tokyo special wards | 6,839 | About ¥6.84 million | Published |
| Sagamihara | 9,149 | About ¥9.15 million | Published |
| Saitama City | Not published | — | Insufficient sample size |
| Yokohama | Not published | — | Insufficient sample size |
| Chiba City | Not published | — | Insufficient sample size |
Source: Statistics Bureau of Japan, National Survey of Family Income, Consumption and Wealth (2019), households with two or more members in each city
Kawasaki is highest, but only three cities can be compared
Among published figures, Kawasaki records ¥9.752 million, Sagamihara ¥9.149 million, and Tokyo's 23 wards ¥6.839 million. The gap between Kawasaki and Tokyo's 23 wards is ¥2.913 million.
However, figures for Yokohama, Saitama City, and Chiba City are not published because of insufficient sample sizes. Age-specific municipal figures are also susceptible to sample variation, so Tokyo's 23-ward value cannot be declared “typical for people in their 30s in Tokyo.”
Kawasaki's dual-income structure and Tokyo's diverse households pull the averages apart
Kawasaki has attracted dual-income households in their 30s and 40s who work in Tokyo, particularly in areas such as Musashi-Kosugi, while the city itself also has high-value employment at companies such as Fujitsu and NEC. When the data are limited to households with two or more members headed by someone in their 30s, this structure of working-age dual-income households appears strongly.
Tokyo's 23 wards range from high-income households in Minato and Chiyoda to a wide variety of households in eastern and northern parts of the city, while younger households also face high housing costs. Annual income and housing expenses are separate indicators, however, so the observed gap cannot be causally explained by living costs alone.
How to read these figures
The figures in this article are published values for the stated year, area, and aggregation unit. Averages and rankings are affected by age composition, household composition, industry and company size, sample size, and other factors. Read them as baseline data under comparable conditions, not as predictions for individuals or specific households.
Summary: Kawasaki is high among households in their 30s, but this is only a three-city reference comparison
Kawasaki is highest among the three cities with published figures, but this is not a six-city ranking. The result provides evidence of Kawasaki's dual-income and Tokyo-commuting household structure, but the unpublished cities and sample limitations must be stated clearly.
- Kawasaki: about ¥9.75 million
- Sagamihara: about ¥9.15 million
- Tokyo special wards: about ¥6.84 million
- Yokohama, Saitama City, and Chiba City are not published, so a definitive ranking cannot be made
Source: Statistics Bureau of Japan, National Survey of Family Income, Consumption and Wealth (2019)
📊 Analysis notes
This article is based on the following statistical data.
- Statistics used: Statistics Bureau of Japan, National Survey of Family Income, Consumption and Wealth (Household Income) (Table ID: 0003426439, view on e-Stat)
- Indicator: Annual income of households with two or more members whose household head is aged 30–39
- Areas covered: Tokyo special wards, Yokohama, Kawasaki, Saitama City, Chiba City, and Sagamihara
- Year: 2019
- Independent calculation: Published figures converted to units of ¥10,000 and reorganized so that only cities with published values can be compared
- Data retrieved: June 6, 2026
- Notes: Figures for Yokohama, Saitama City, and Chiba City are not published. The article contains interpretation based on regional characteristics, but numerical values directly observable in the statistical table should be distinguished from interpretations of background factors.
Chart and table values have been independently aggregated and visualized from the statistical data above.