Americans identifying as LGBTQ+

Between 2014 and 2023, as more Americans identified as LGBTQ+ — rising from about 4% to 7.6% — Japan's total population declined from 127 million to around 124 million, producing a brisk negative correlation of -0.9676. The most straightforward reading is that Japanese population decline is creating a vacuum that American identity formation is rushing to fill, which is not how demography works but is exactly the kind of thing a panicked op-ed would suggest. Alternatively, Japan's population is shrinking because nobody told them that more expansive identity categories were an option. The data declines to speculate.

The negative correlation here reflects two entirely independent trends that happen to move in opposite directions over the same decade. Japan's population has been declining since 2010 due to one of the world's lowest birth rates (around 1.2 per woman), minimal immigration, and a rapidly aging society — a long-predicted demographic contraction. American LGBTQ+ identification has risen due to generational change, reduced stigma, and shifting survey methodology allowing more accurate self-reporting. The two series share no common cause; they simply represent an aging East Asian democracy and a changing American social landscape moving simultaneously in opposite numerical directions.

Negative correlations across geographically and culturally unrelated datasets are a reminder that the mathematical machinery of correlation is indifferent to plausibility — it will find the pattern whether or not the universe put it there. The -0.9676 is real; the relationship is not.