Kawasaki has the highest average household income among the six cities at about ¥10.94 million for households with two or more members, but average financial assets are about ¥18.63 million, below Tokyo's 23 wards. The data show that even a high-income city may not immediately have the highest asset balance when it contains many younger working households still buying homes and raising children.
Financial assets in Kawasaki by age (2019, households with 2+ members)
| Age of household head | Financial assets (¥1,000) | Approximate value |
|---|---|---|
| Average, all ages | 18,626 | About ¥18.63 million |
| 30–39 | 6,598 | About ¥6.60 million |
| 40–49 | 9,246 | About ¥9.25 million |
| 50–59 | 33,918 | About ¥33.92 million |
| 60–69 | 22,158 | About ¥22.16 million |
| 70–79 | 19,206 | About ¥19.21 million |
Income vs. assets: the Kawasaki paradox
| Indicator | Kawasaki | Tokyo special wards |
|---|---|---|
| Average household income | ¥10.94 million (1st) | ¥10.54 million (2nd) |
| Average financial assets | ¥18.63 million (5th) | ¥22.68 million (3rd) |
Highest income, but only fifth among the six cities in financial assets
Financial assets are about ¥6.60 million in the 30s, ¥9.25 million in the 40s, ¥33.92 million in the 50s, ¥22.16 million in the 60s, and ¥19.21 million in the 70s. After a large jump in the 50s, the figures fall again, so this is not a smooth age progression.
The all-age average is ¥18.626 million, ¥4.053 million less than the ¥22.679 million average in Tokyo's 23 wards. High current income and high current financial-asset holdings do not necessarily rank the same way.
Young high-income households in Musashi-Kosugi are still in the asset-building stage
Redevelopment in areas such as Musashi-Kosugi has attracted high-income dual-income households in their 30s and 40s. Even when income is high because of Tokyo-based jobs or high-value local employment at firms such as Fujitsu and NEC, financial-asset balances may remain lower if households have recently purchased homes, are repaying mortgages, or are paying childcare and education costs.
Kawasaki also differs from Tokyo's 23 wards and Yokohama in the depth of its older household population. In a city with a high share of younger working households, it is natural for income—the flow—to rise first and assets—the stock—to accumulate later.
How to read these figures
These asset statistics are averages and do not directly show medians or the distribution of assets. They cover households with two or more members, and real estate assets outside financial assets may not be included.
The article is organized primarily around figures from published statistics. Numerical values directly observable in the statistical tables should be distinguished from interpretations of background factors.
Summary: Kawasaki's earning power is ahead of its accumulated financial assets
Kawasaki has high household income, but its average financial assets are not the highest. One plausible explanation is a time lag between income as a flow and assets as a stock because the city has attracted younger dual-income households that are still in the home-buying stage.
- Average household income: about ¥10.94 million
- Average financial assets: about ¥18.63 million
- 30s: about ¥6.60 million; 40s: about ¥9.25 million
- Do not assume that high income and high assets must have the same ranking
Source: Published statistics listed in the Analysis notes at the end of this article
📊 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 Assets) (Table ID: 0003426527, view on e-Stat)
- Area: Kawasaki
- Year: 2019
- Data retrieved: June 6, 2026
- Notes: The article is organized primarily around figures from published statistics. Because asset distributions, household differences, and other factors outside the article also matter, numerical values directly observable in the statistical tables should be distinguished from interpretation.
Chart and table values have been independently aggregated and visualized from the statistical data above.
Table values have been organized from the statistical data above.