Independent insights into income, wages, population, household finances, and regional trends across Japan, based on publicly available statistics.
Using population-movement data, we compare in-migration, out-migration, and net migration across six major Kanto cities. Yokohama has the largest net inflow in absolute numbers, while Saitama City leads relative to population.
Using census data, we analyze Yokohama's 39.9% share of one-person households. The figures show the scale of living alone in the city and why housing and services must account for both younger and older single residents.
Using census data, we compare the share of residents aged 65 and over in six major Kanto cities. Kawasaki is the youngest by this measure, while Chiba City and Sagamihara have the highest aging rates.
Using census data, we analyze Yokohama's daytime/nighttime population ratio of 92.5%. Even as Japan's largest city by population, Yokohama has many Tokyo commuters—but it is also a major employment center in its own right.
Using census data, we analyze daytime and nighttime population in Tokyo's 23 wards. The resident population of 9.73 million rises to 12.35 million during the day, revealing the scale of a work center that draws about 2.61 million net commuters and students into central Tokyo.
Using census and population-projection data, we examine Sagamihara's population trends and consider how the planned Linear Chuo Shinkansen station at Hashimoto may affect the city's future.
Using census and population-projection data, we examine Chiba City's population trends, the role of Makuhari redevelopment, and the projected decline toward 2045.
Using census and population-projection data, we examine Saitama City's population trends more than two decades after the merger of Urawa, Omiya, and Yono and how the city has continued to grow.
Using census and population-projection data, we examine Kawasaki's age structure and net in-migration, and why the city continues to attract younger generations.
Using data from Japan's Social and Demographic Statistics System, this article examines Yokohama's population projections. The city's population is forecast to decline from about 3.79 million in 2025 to about 3.66 million in 2040, a decrease of roughly 123,000. It explains the long-term demographic outlook for Yokohama, where net in-migration continues but overall population decline is expected.