Stimulants used to be mainstream, but the trend is shifting toward marijuana and cocaine
In a country long defined by its resistance to Western drug patterns, Japan now confronts a quiet convergence: a government survey released in July 2026 estimates that 350,000 people have used cocaine — the highest figure since tracking began nearly two decades ago. The shift, away from stimulants and toward marijuana and cocaine, mirrors trajectories already familiar in Europe and North America, suggesting that no society remains fully insulated from global currents of substance use. What makes this moment significant is not only the numbers, but the channels through which the next generation is being reached — social media solicitation targeting young people, particularly women, in spaces that traditional enforcement was never designed to police.
- Japan's cocaine use has reached a recorded peak of 350,000 lifetime users, signaling that the country's historically distinct drug culture is being reshaped by global forces.
- Police cocaine-related arrests surged 27% in a single year, with social media emerging as the primary distribution channel — a front that conventional law enforcement struggles to contain.
- Young people in their 20s are being solicited at the highest rates, with women specifically targeted for cocaine, pointing to a deliberate and predatory recruitment pattern.
- Marijuana has quietly become Japan's most prevalent illegal drug at 1.6% of the population, displacing stimulants that once defined the country's drug problem for generations.
- Researchers warn that self-reported surveys almost certainly undercount actual use, and are calling for stronger relapse prevention as the problem grows more visible and measurable.
A government survey released in early July has placed a number on a trend many had sensed but not yet quantified: roughly 350,000 people in Japan between the ages of 15 and 64 have used cocaine at some point in their lives, the highest estimate since tracking began in 2007. The Ministry of Health, Labor and Welfare drew its findings from 3,156 valid responses collected between October and December 2025, extrapolating a 0.4 percent lifetime use rate across the broader population.
The picture that emerges is uneven by gender and age. Men account for approximately 210,000 of those users, women for around 140,000. People in their 40s form the largest cohort of past users, at roughly 130,000 individuals. But solicitation tells a different story — young people in their 20s report being approached most frequently, and women are being targeted specifically for cocaine, while men are more often offered marijuana or stimulants.
Cocaine is not Japan's largest drug concern. That belongs to marijuana, now used by an estimated 1.41 million people, or 1.6 percent of the population. Lead researcher Takuya Shimane of the National Center of Neurology and Psychiatry described the broader shift plainly: stimulants, once the defining substance of Japan's illegal drug scene, are giving way to marijuana and cocaine — a pattern already well established across Europe and the United States.
Law enforcement has registered the pressure. Police took action against 804 people for cocaine-related offenses in 2025, a 27 percent rise from the year before, with many cases traced to social media — a distribution channel that traditional policing was not built to address. Researchers caution that self-reporting likely undercounts actual use, and emphasize the urgency of relapse prevention. Fentanyl, for now, remains a marginal presence, but the trajectory with cocaine and marijuana suggests that without meaningful intervention, Japan's drug landscape will continue its westward drift — carried, increasingly, through digital channels into the hands of the young.
Japan's drug landscape is shifting in ways that mirror the West, and a government study released in early July has put numbers to a troubling trend. Roughly 350,000 people between 15 and 64 have used cocaine at some point in their lives—the highest estimate since researchers began tracking the figure in 2007. The data comes from a nationwide survey conducted by the Ministry of Health, Labor and Welfare, which reached out to 5,000 people selected from residential registries between October and December of 2025, ultimately collecting valid responses from 3,156 of them. When those respondents were asked about cocaine use, 0.4 percent admitted to having tried it. Extrapolated across the population, that fraction becomes a significant number.
The breakdown by gender reveals a pattern: men account for about 210,000 of those users, having reported cocaine use at a rate of 0.5 percent, while women make up roughly 140,000, at 0.3 percent. Age matters too. People in their 40s represent the largest single cohort of past users, at 0.7 percent of that age group—approximately 130,000 individuals. Yet the solicitation pattern tells a different story. Young people in their 20s report being approached most often, with 1.2 percent saying they had been offered drugs, an estimated 140,000 people. Women, notably, are being targeted specifically for cocaine, while men are more commonly approached about marijuana and stimulants.
Cocaine is no longer Japan's primary drug concern. That distinction belongs to marijuana, which 1.6 percent of survey respondents said they had used—translating to about 1.41 million people nationwide. This represents a genuine shift in the country's drug landscape. Takuya Shimane, the head researcher at the National Center of Neurology and Psychiatry, framed the change plainly: stimulants, which once dominated Japan's illegal drug scene, are giving way to marijuana and cocaine, mirroring patterns already established in Europe and the United States. The implication is clear—Japan is not isolated from global drug trends, and the substances available and sought after are converging with Western markets.
Law enforcement has felt the pressure. The National Police Agency reported that officers took action against 804 people in connection with cocaine use during 2025, up 218 cases from the previous year. That represents a 27 percent increase in a single year. Many of those arrested, according to police, gained access to cocaine through social media—a distribution channel that traditional enforcement struggles to contain. The timing of the police surge and the government survey's release suggests a moment of reckoning: the problem is visible, measurable, and growing.
It is worth noting that these figures likely undercount actual use. The survey relied entirely on self-reporting, and people are not always forthcoming about illegal drug use, even in anonymous surveys. The researchers acknowledge this limitation implicitly by emphasizing the need for stronger relapse prevention measures going forward. Fentanyl, the synthetic opioid that has devastated parts of North America, appears not yet to be a significant problem in Japan—only two survey respondents reported abusing the drug, and Shimane noted that Japan's medical distribution of fentanyl remains tightly controlled. But the trajectory with cocaine and marijuana suggests that without intervention, Japan's drug crisis could deepen and broaden, particularly among younger people already being actively recruited through digital channels.
Notable Quotes
Stimulants used to be mainstream, but the trend is shifting toward marijuana and cocaine, as in Europe and the United States— Takuya Shimane, head researcher at the National Center of Neurology and Psychiatry
Fentanyl is sometimes used for treatments in Japan, but its distribution has been properly controlled— Takuya Shimane
The Hearth Conversation Another angle on the story
Why does a 0.4 percent figure matter enough to call it a record?
Because 0.4 percent of 87 million people is 350,000 lives. And because it's the highest number since they started measuring this way in 2007. That's nearly two decades of data pointing in one direction.
The survey only reached about 3,000 people. How confident can we be in those numbers?
That's the right skepticism. The researchers know it too—they're explicit that actual use is probably higher, since people underreport illegal behavior. But the trend is what matters. Even if the true number is 500,000 instead of 350,000, the direction is the same.
What strikes you most about the gender split?
That women are being specifically targeted for cocaine. Men get offered marijuana and stimulants. That's not random. It suggests dealers are segmenting their market, treating different demographics as different customer bases. That's a level of sophistication that's concerning.
Social media keeps coming up. Why is that the distribution channel now?
Because it's invisible to traditional policing. A dealer doesn't need a street corner or a known location. They can reach hundreds of people through encrypted messages, and by the time enforcement catches up, they've moved platforms. It's asymmetric—the police are still thinking in terms of physical locations.
The researcher mentions relapse prevention. What does that actually mean?
It means treatment focused on keeping people from going back to the drug after they've stopped. Not just detox, but the harder work of understanding why they used it and building a life that doesn't need it. It's an admission that enforcement alone won't solve this.
Is Japan heading toward a fentanyl crisis like America's?
Not yet. Only two people in the survey had abused it, and the medical system is controlling its distribution carefully. But the openness to cocaine and marijuana suggests the conditions are there. If fentanyl becomes easier to access, the vulnerability is already built in.