'Year of the Fire Horse' Superstition Impacts Japan's Declining Birth Rate

In 1966, Japan experienced a stark demographic anomaly: a sudden drop of approximately 25% in the number of births compared to the previous year. This significant decline was not attributed to war, economic recession, or epidemic, but rather to a deeply rooted superstition surrounding women born in the 'Year of the Fire Horse' (丙午, 'Hinoe Uma'). This ancient belief held that females born in the 'Hinoe Uma' year were prone to fiery tempers, would bring misfortune to their husbands, or even cause their deaths. This superstition, reportedly stemming from a legend involving a woman who set a fire in Edo (old Tokyo) in 1682, led many families to postpone or avoid having daughters in 1966. The phenomenon was also intertwined with the marriage customs of the time. In the 1960s, nearly half of first marriages in Japan were arranged or heavily influenced by family. Parents, concerned about their daughters' future marital prospects, were wary of the 'Hinoe Uma' stigma. Media coverage amplified these concerns, further embedding the superstition into public consciousness. However, the superstition's long-term impact on marriageability proved unfounded. Economic analyses of national surveys by scholars like Professor Hiroyuki Yamada found no clear evidence that women born in 1966 faced disadvantages in marriage, education, or post-marital economic conditions. By the late 1980s and early 1990s, when this generation reached marriageable age, approximately 80% of first marriages were based on love, diminishing the relevance of birth year as a matchmaking criterion. As the 'Hinoe Uma' year approaches again in 2026, demographers had feared a further decline in Japan's already low birth rate. However, the first half of 2026 has seen a slight increase in births, a stark contrast to the 1966 slump. Experts attribute this to a diminished belief in the 'Hinoe Uma' superstition among younger generations, the prevalence of love marriages, and the increasing age of first-time mothers, making it harder to postpone childbirth for a year. Despite this, the influence of the lunar zodiac on birth decisions persists in some East Asian communities. Hong Kong, Taiwan, and China have all recorded birth surges in specific zodiac years (e.g., Year of the Dragon). This indicates that traditional calendars and their associated symbolism can still subtly shape family planning. While Vietnam shares some cultural ties with East Asian traditions, its demographic trends are influenced by a unique set of factors, including its one-party political system, rapid economic growth, urbanization, and evolving societal values. Unlike the pronounced impact of the 'Hinoe Uma' superstition in Japan, Vietnam's birth rate is shaped by a confluence of socio-economic and policy-driven forces. Source: VnExpress