The Year of the Fire Horse 2026 and the Truth Behind Japan's Declining Birthrate: When Superstition Has No Room Left to Move

In January 2026, the once-every-60-years Year of the Fire Horse (hinoeuma) arrived. But to state the result upfront: no decline in births has been observed.

According to an analysis published in April 2026 by Takumi Fujinami, chief researcher at the Japan Research Institute, Japan's January 2026 birth count was +0.5% year-on-year, with virtually no Fire Horse effect observed. Because births occur approximately ten months after conception, anyone deliberately avoiding a January 2026 birth would have needed to make that decision by early 2025. Yet there were no prior signs of a sharp drop in obstetric clinic patient numbers, and the preliminary figures came in with a slight increase.

Compared with 1966, the contrast is stark. In that previous Fire Horse year, the birth count was 1,360,974, the total fertility rate was 1.58, and births fell by 25.4% year-on-year. Considering the rebound from 2.14 in 1965 to 2.23 in 1967, 1966 was clearly a demographically isolated "single-year trough."

Going further back, the other Fire Horse year of 1906 (Meiji 39) recorded a birth count of 1,394,295, with a year-on-year change of roughly -4% — far less dramatic than 1966. Three Fire Horse years sharing the same superstition produced three distinct outcomes: -4%, -25.4%, and near-zero.

What matters here is to stop reading the Fire Horse in binary terms of "it worked / it didn't work." A society that shares the same superstition produces a steep decline in one year, near-stagnation in another, and only a slight dip in a third. What generated these differences was not the superstition itself but the scale of the "margin" through which superstition could intervene in childbearing decisions. The fact that the Reiwa-era Fire Horse does not move means that margin has disappeared.

Meanwhile, Japan's 2024 birth count was 686,061, and the TFR was 1.15, setting a ninth consecutive record low. The 2025 preliminary figure was 705,809 (on a preliminary basis including foreign nationals and Japanese nationals abroad), and the natural population decrease reached a record high of 899,845. Compared to the approximately 1.36 million births of 1966, the current level is already less than half. At this level, there is simply no room left to observe a "superstition-driven single-year decline."

Not Letting 1966 Be Explained Away as "Superstition"

The figure of -25.4% in 1966 stands out even within the postwar Japanese demographic record. Yet simply attributing this decline to "people avoiding births because of the hinoeuma superstition" misses what was actually happening in Japanese society at the time.

Population researcher Yoshikawa (2025) flagged an important fact in nippon.com: in 1966, the proportion of first births among all newborns was the largest ever recorded since data collection began. In other words, what declined in 1966 was not the decision of whether to have a first child, but the decision of whether couples who already had one child would go on to have a second or third.

Population researcher Ryohei Mogi (2025) identified the same structure. Of the birth decline in 1966, roughly 90% can be explained by the decline in second and third births. First births were barely suppressed at all. These two observations are consistent with each other: because the absolute number of first births remained largely stable even as total births fell by roughly 25%, the proportion of first births among all newborns reached its all-time recorded high. If couples had fully believed in the superstition, they would logically have delayed their first child. But in reality, first children were born — and only subsequent children were selectively suppressed. This points not to a pure expression of superstition, but to evidence that married women were exercising deliberate rational control over family size.

What made that rational planned behavior possible was the synchronized arrival of postwar institutions, technology, and social movements. The 1948 Eugenic Protection Law legalized abortion for economic reasons. During the 1950s, midwife-led contraceptive counseling programs spread nationwide, and condom adoption rates rose through the 1960s. The family planning movement was promoted as national policy, and the norm of "having children in a planned, appropriately spaced manner" permeated Japanese households. Oral contraceptives (the pill) were not approved in Japan until 1999, so the primary contraceptive methods at the time were condoms, the Ogino method, and abortion — but the very fact that these tools were available to married women was a decisive difference from 1906.

What happened in 1966, then, was not superstition acting alone to move people. Married women who had gained access to family planning tools designed their own schedules for second and third children — in a form that avoided the Fire Horse year. This is the structure that Yoshikawa described as "a mass social phenomenon fanned by mass media combined with a rational act of self-determination by women of childbearing age who, armed with knowledge of reproductive science, protected their own reproductive health and rights."

What the -4% of 1906 Tells Us

The fact that the same superstition in 1906 produced only a roughly -4% year-on-year decline further reinforces this interpretation. Women in the Meiji era had virtually no means to exercise deliberate control over the timing of childbirth. Abortion and contraception were heavily constrained both socially and legally. The concrete option of "postponing to next year" simply did not exist as a response to superstition.

Instead, 1906 vital statistics carry a different trace. The male-to-female sex ratio at birth was 108.7, among the most extreme on record including the prewar period. The historical account of hinoeuma superstition traced by Fukasawa (2025) — reaching back to a woman born in 1666 (Kanmon 6) — shows a cumulative record of forced abortions, infanticide, and discrimination-driven deaths. A significant body of research holds that the extremely low recorded count of female births in 1906 reflects birth registration manipulation and infanticide.

In short: in a society lacking contraception and family planning, hinoeuma superstition turns against female infants after birth. In a society where those tools have become available, it turns against family planning before birth. And in a society where those tools are fully available but the birthrate has become chronically depressed, there is nowhere left for superstition to turn. The three Fire Horse years were not a measure of the strength of the superstition itself, but a mirror reflecting what kinds of "escape routes" society had available.

The Role of Media and the Urban-Rural Divide

The exceptional steepness of the 1966 decline was also shaped by a distinctive media environment. It was the era of high economic growth, immediately after television had reached every household — a time when magazines, television, and newspapers simultaneously amplified hinoeuma narratives. As Bando Taro (2025) summarizes, the 1966 birth decline was concentrated in regions with early marriage, rural areas, and high fertility — with limited impact on urban white-collar populations. Regions that had already entered a mode of "choosing their own family size" were those in which superstition functioned most effectively as a "convenient pretext."

On the book side, 『ひのえうま360年史: 差別・堕胎・自死⋯ 日本が信じた最悪の迷信』 (Hinoeuma: A 360-Year History — Discrimination, Abortion, Death...Japan's Worst Superstition) by Fukasawa Ken (2025) provides a historical account of what each Fire Horse year, from 1666 to the present, has demanded of women's bodies. This article re-reads 1966 as a "crossroads of superstition and structure," but the fact that those standing at that crossroads were always women must not be forgotten in any discussion of the Reiwa-era Fire Horse.

The "Japan-Specific" Nature Seen Through International Comparison

No other advanced nation experienced a comparable birth decline in 1966. Even neighboring countries sharing the same zodiac culture tell a different story. South Korea, for example, saw approximately an 8% decline in births during the Year of the White Horse (1990), but nothing as dramatic as Japan. Although the twelve-branch zodiac itself originated on the Asian continent, the gendered taboo that "a woman born in a Fire Horse year will devour her husband" is a Japan-specific construction. Only in Japan did society have the social margin for births to shift by 25% in response to this taboo.

And now, that margin is disappearing from Japan as well. The 2024 TFR of 1.15 and the 2025 estimated TFR of 1.13 place Japan in the world's lowest tier after South Korea's 0.75 (2024) — already too low for superstition to generate a meaningful single-year fluctuation.

How an Average First-Birth Age of 31 Eliminated the "Delay by One Year" Option

The primary reason the Reiwa-era Fire Horse produces no movement is the rise in the average age at childbirth.

According to analysis by Takumi Fujinami (Japan Research Institute), the average age of mothers at first birth has risen from 25 to 31, effectively eliminating the option of delaying by one year. Female fecundity (the likelihood of natural conception) is broadly understood to decline noticeably from the early 30s onward, with a sharp increase in infertility risk after age 35. For the generation of the 1966 era — when the average age at first marriage was around 24.5 and first births occurred around age 25 — adjusting the schedule to "skip the Fire Horse and try next year" was practically feasible. But for the generation having a first child at 31.0 in 2024, deferring even by one year for superstition's sake would push the first birth to age 32 — and any subsequent children would be older still. Given the age-related risks that accumulate from the mid-30s onward, the temporal and medical margin to casually insert "just one more year" has effectively ceased to exist.

As Michito Koike (SOMPO Institute Plus, 2025) points out, in an age of late marriage and late childbearing, the time cost of delaying by one year for superstition's sake is far greater than it was 60 years ago. The same report notes that social media usage among people in their 30s exceeds 60%, and fact-correction mechanisms like community notes on platform X help suppress the spread of superstition. But that is not the essential point. Even if media had amplified the 2026 Fire Horse narrative, the behavioral margin to push back the timing of a birth — the very room to act — has already ceased to exist for most people.

A Reiwa Mothers Survey (n=935) conducted by BabyCalendar in December 2025 found that awareness of the hinoeuma superstition reached approximately 80%, yet 76.2% said they "don't care," with the majority of those who expressed a positive stance saying "I still want to give birth." It is closer to reality to read this not as "they don't care" but as "even if they did care, there is no way to delay."

"Since the 1.57 Shock of 1989, Every Year Has Been Below the Fire Horse Level"

A second structural factor is that the TFR itself has been chronically near the floor. The one-line observation by Bando Taro — "since the 1.57 shock of 1989, Japan has been in a state of permanent hinoeuma or worse" — cuts to the core. The 1989 TFR of 1.57, announced that year, shocked contemporary media and became known as the "1.57 shock," but from that point on Japan's TFR has remained below the 1966 Fire Horse level of 1.58. In other words, Japanese society has been absorbing, for the 36 years since 1989, a negative demographic pressure equal to or exceeding that of the Fire Horse year — every single year.

As examined in the sister article "Behind a 1.13 Fertility Rate", the married (or "with-spouse") fertility rate has also reversed since 2015, shifting from a "push-up factor" to a "push-down factor." The completed fertility rate for married couples now stands at 1.90, an all-time low. Japan has entered a new phase in which even couples who do marry are increasingly not having children. In 1966, a sharp single-year decline was achievable in the "phase" in which couples who already had one child were holding back a second — but today, the proportion of couples who do not progress to a first child even after marriage is rising. The very population that hinoeuma once suppressed — second and third births — is already declining without any superstition.

Against this backdrop, layering superstition on top generates almost no further birth loss. Japan's January 2026 figure of +0.5% is an observation not only of "weakened superstition" but of "no flesh left in Japan for superstition to cut away." The Japan Research Institute estimates that the full-year 2026 confirmed figure will likely fall back into the high-600,000s.

From the Era of Single-Year Shocks to the Era of Chronic Shocks

To summarize the analysis above in a single sentence: Japan's declining birthrate has transitioned from a society in which single-year shocks could produce movement, to one in which chronic shocks hold the floor permanently in place. For an external event like the Fire Horse to generate a large single-year fluctuation, several conditions must be met simultaneously. First, society must possess tools that allow childbearing timing to be consciously adjusted. Second, childbirth schedules must have enough slack that they can be shifted forward or backward by a year. Third, society as a whole must still be at a normative level where "having children is the default," leaving enough headroom for a temporary holdback triggered by some external event.

1906 lacked the first condition. 1966 had all three. 2026 has lost the second and third. That is why the Fire Horse does not move. And its failure to move is a strong signal that Japan's declining birthrate has entered a phase in which it is resistant to policy-driven movement.

As examined in the sister article "The Core of Japan's Declining Birthrate Is Not Childcare Support", Japan's three major elderly-related expenditures total 113.6 trillion yen while the children and child-rearing budget stands at roughly 10 trillion — a structural imbalance of resources that forms the backdrop of the chronic fertility decline. As examined in the sister article "The Debate Over the Childcare Support Levy and Social Insurance", even the acceleration plan continues to operate while carrying the intergenerational transfer imbalance intact. Without addressing these underlying structures, not only will single-year events like the Fire Horse fail to move the numbers — single-year policy measures are also likely to do nothing more than skim the surface of annual fluctuations. Chronic shocks require chronic structural reform.

What Policy Narratives Overlook

It is true, as an empirical observation, that "the Reiwa-era Fire Horse has not produced the steep decline seen in 1966." But to interpret this as "Japanese people have freed themselves from superstition" or "modern women have become more clear-headed" is to commit two compounding errors.

First, women in 1966 were also rationally designing their own childbearing timing. Having gained access to family planning tools, they exercised the choice to "defer a second child to the following year to avoid the Fire Horse year." That was not behavior driven by superstition — it was an expression of self-determination over their own bodies. The framing of "freed from superstition" obscures the rationality of women at that time.

Second, in Japan today, awareness of the superstition still exceeds 80%. It is true that a majority now say they "don't care," but simultaneously, those who would care are trapped in a structure in which acting on that concern is not possible. The framing of "freed" conceals the latter reality. What has in fact been taken from the hands of contemporary women who are having their first child at 31 is the very option of "postponing by one year" — a choice that theoretically existed, but has been structurally eliminated.

What matters in living through the era of chronic shocks is not to be swayed by single-year improvements or deteriorations in any one indicator. January 2026's +0.5% demonstrates that "the Fire Horse had no effect," but it does not demonstrate that "Japan's declining birthrate is improving." It is, if anything, an observation that the birthrate is already stuck to a floor that even superstition cannot budge. The Japan Research Institute estimates that the full-year 2026 confirmed figure will likely fall back into the high-600,000s.

The confirmed 2025 figure (Japanese nationals only) will be published in June 2026, and only then will the true numbers showing childbearing behavior before and after the Reiwa Fire Horse become visible. But rather than how many tens of thousands of births it shows gained or lost, what we should be reading is the structural signal that "chronically low levels have become so entrenched that even superstition cannot move them." It is not a single-year wave — it is the sea level itself that has fallen. A lake without waves appears calm, but that is not a sign of health.

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References

Reference Books

• 『ひのえうま360年史: 差別・堕胎・自死⋯ 日本が信じた最悪の迷信』 (Hinoeuma: A 360-Year History — Discrimination, Abortion, Death...Japan's Worst Superstition) by Fukasawa Ken (2025): Beginning with a woman born in 1666 (Kanmon 6), this work traces the cumulative history of forced abortions, infanticide, and discrimination-driven deaths across every Fire Horse year through the present. An essential reference for grasping, across a long arc of time, what the hinoeuma superstition has demanded of women's bodies