Tokushima Prefecture

Tokushima’s hidden strength lies in its physician count (per 100,000 population). It overshoots by about 1.7σ the level expected from the prefecture’s overall capacity—an indicator that has risen to a height its underlying strength cannot explain. At the opposite pole is the lowest “population change rate,” which, together with the complete unemployment rate, sinks into the lower national ranks. The remaining indicators are broadly near the national average, with standard dispersion—a profile in which strength and weakness coexist in separate categories.

What is further structurally important is that this high physician count is not linked to “average life expectancy.” In many prefectures across the country these two tend to move together (correlation 0.49), yet Tokushima alone faces the opposite way. The physician count is top-tier nationally while average life expectancy is in the lower ranks—a twist easily concealed by average values or overall rankings. Right on the inside of the hidden strength is where this prefecture’s point of interest lies.

The strength of culture, epitomized by Awa Odori, does not directly fill in the real number that is average life expectancy, either. The two are separate axes of evaluation. In a prefecture where the physician count has risen 1.7σ above its underlying capacity, life expectancy faces the opposite way—this suggests not a matter of the quality of medicine but the possibility that lifespan is being shaved by some other path that medicine cannot support. Lifestyle habits, the working environment, salt intake—it is too early to pin the reason on a single one, but the very fact that this twist remains inside the hidden strength is something I write down, as it is, on the line.

In speaking of Tokushima’s future, the great Nankai Trough earthquake must be placed as a “reality continuing from the past.” Tokushima has been struck repeatedly through history by Nankai Trough earthquakes and tsunami—the 1707 Hoei earthquake (M8.6), the 1854 Ansei Nankai earthquake (M8.4), and the 1946 Showa Nankai earthquake (M8.0). The prefecture has published its damage projections for a great Nankai Trough earthquake, and the long-term evaluation by the government’s Earthquake Research Committee places it in the highest-rank occurrence-probability band. Even with the timing uncertain, the certainty is a government official value, and the scale of impact is extremely large—and it is, moreover, a structural downward pressure whose meaning changes greatly depending on whether one is on the coast or inland.

On top of that, the weight of population dynamics overlaps—the generational turnover concentrated in 2031–33 and the phase of a rising vacant-home ratio. It coexists with the twist seen in the previous section—“a top-tier physician count but life expectancy in the lower ranks”—and the direction of the aggregate points downward.

A present with a hidden strength; an earthquake risk that history has etched again and again; the prefecture-wide weight of population dynamics. 1707, 1854, 1946—the fact that the Nankai Trough has shaken Tokushima’s coastline every 70 to 150 years is a story of regularity, not of uncertainty. I want to read this not by rounding it into one but by separating it point by point and time axis by time axis, bearing in mind that disaster especially changes meaning decisively between coast and inland. The individual schedules, plans, and degrees of certainty can be followed one by one in the development roadmap at the bottom of the page.