Cannabis Culture in East Asia During the 1920s

Hemp as an Agricultural Commodity

At the start of the 1920s, cannabis in East Asia was primarily an agricultural commodity, not a controlled substance. China, Japan, and Korea had centuries-long traditions of hemp (Cannabis sativa) cultivation for fiber, oil, and seed—uses documented in classical texts and maintained through the Qing, Meiji, and Joseon periods ^[1]. Japanese agricultural records from the 1920s document regulated hemp farming for fiber and oil; Korean hemp was similarly managed under Japanese colonial administration (Korea was under Japanese rule 1910–1945); and Chinese hemp continued to be harvested despite civil unrest ^[1].

Recreational cannabis use was present but remained marginal in East Asian society during this period Weak / limited. Unlike opium—which had become deeply entrenched in parts of China and Southeast Asia by the 1920s—cannabis smoking did not constitute a visible or organized market. Where recreational use occurred, it was concentrated in certain urban centers and often conflated with opium den culture in contemporaneous accounts. The primary psychoactive cannabis preparation used recreationally, where evidence suggests it existed, was hashish imported from Central Asia or locally processed resin, not flower smoking as would later become common in the West Anecdote.

The 1925 Geneva Convention and International Control

The decisive shift toward cannabis regulation came through international drug control architecture rather than grassroots moral panic. On 19 February 1925, the League of Nations concluded the Second International Opium Conference in Geneva, producing the Convention for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs Strong evidence^[2]. This multilateral treaty expanded the scope of international narcotics control beyond opium to include cannabis, classifying it alongside heroin and cocaine Strong evidence^[2].

The Convention obligated signatory nations—which included Japan (a League member) and territories under Japanese administration—to restrict international cannabis trade to medical and scientific purposes Strong evidence^[2]. China, weakened by civil war and fragmented authority, was less uniformly bound, but foreign powers in treaty ports and concessions applied pressure for local compliance.

Japan, keen to demonstrate modern governance and international compliance, began aligning domestic policy with the Treaty's framework. During the early 1920s, the Japanese government had already undertaken surveys and licensing of hemp cultivation in metropolitan Japan. After 1925, oversight tightened: hemp farming increasingly required explicit permits, and Cannabis sativa plants grown outside licensed agricultural zones faced restriction Weak / limited.

Korea and Taiwan, as Japanese colonies, followed Tokyo's administrative lead. Colonial agricultural bureaus documented hemp yields and implemented permit systems for cultivation by the mid-to-late 1920s Weak / limited. This represented a break from earlier Joseon and early-colonial practice, where hemp was a common village crop.

National Policy Implementation

Japan: The Japanese state undertook a deliberate bureaucratic transition during the 1920s. Licensed hemp farmers continued operation through the decade, and the government maintained state monopoly on opium but did not yet criminalize cannabis cultivation wholesale Weak / limited. However, the underlying philosophy shifted: cannabis moved from an open commodity to a controlled substance requiring state authorization ^[3]. The 1930 revision to Japan's narcotics framework tightened these controls further Weak / limited.

Korea: Under Japanese colonial administration, Korean hemp farming faced new licensing requirements by the mid-to-late 1920s. This represented a direct administrative transfer of Japanese policy rather than a locally driven regulatory initiative Weak / limited. The timing suggests Korean policy was synchronized with Japanese metropolitan restrictions.

China: China's regulatory landscape was fragmented. The central government, established by the Nationalist Party (KMT) and located in Nanjing, nominally supported international drug control commitments. However, warlord-controlled regions, treaty ports under foreign jurisdiction, and the Chinese Communist base areas operated under different rules and enforcement capacity. Opium prohibition was a Nationalist priority; cannabis received less explicit policy attention, partly because recreational cannabis use remained marginal compared to opium. Northern China and Manchuria, with less centralized authority, saw minimal cannabis enforcement through the 1920s Weak / limited.

Recreational Use: Evidence and Gaps

Evidence for organized recreational cannabis culture in 1920s East Asia is limited No data. English-language and translated primary sources from the period—newspapers, government reports, missionary accounts—mention cannabis sparingly. Opium, morphine, and cocaine appear far more frequently in accounts of urban drug use in Shanghai, Tianjin, and Tokyo.

Anecdotal reports suggest that cannabis smoking was present in Shanghai's international settlement during the 1920s, particularly among foreign residents and in certain nightclub scenes Anecdote. Japanese and Korean-language newspaper archives hint at cannabis smuggling through treaty ports, and occasional police raids in Japanese cities during the late 1920s mention cannabis resin seizures Weak / limited. However, these accounts are scattered and do not suggest a widespread recreational market or organized cannabis subculture.

One unproven hypothesis is that cannabis remained culturally and socially peripheral in East Asia during the 1920s compared to opium—which had multiple centuries of entrenchment—and did not develop the recreational infrastructure that would later emerge in Western cities Anecdote.

A note on myths: Popular narratives about 'ancient Asian cannabis temples' or widespread shamanic cannabis use in the 1920s are unsupported by contemporary sources No data. Most such claims conflate ancient Chinese hemp agriculture (well-documented) with twentieth-century recreational use (poorly documented and apparently rare in this period).

Colonial and Nationalist Agendas

The prohibition and licensing of cannabis in 1920s East Asia was not a response to popular demand for stricter drug control, but rather a top-down alignment with international treaties and colonial administrative modernization Weak / limited.

For Japan, supporting League of Nations drug-control agreements was a way to signal a modern, civilized nation-state in line with Western governance norms ^[2]. Domestic enforcement of cannabis restrictions demonstrated Tokyo's compliance and centralized administrative power over its territory ^[3].

For the Chinese Nationalist government, drug control—particularly opium suppression—was a nationalist cause, a way to reclaim sovereignty from foreign treaty-port authority and assert the KMT's legitimacy. Cannabis was secondary to this agenda but became entangled in the broader consolidation of narcotics authority.

For colonial Korea and Taiwan, cannabis policy was implemented through Tokyo's administrative apparatus rather than negotiated locally. The shift from commons-based hemp cultivation to licensed cultivation reflected the imposition of Japanese administrative rationalization Weak / limited.

Timeline

• 1920–1924: Hemp cultivation continues largely unregulated in China, Japan, Korea; recreational cannabis use remains marginal and undocumented.
• 19 February 1925: League of Nations adopts the Convention for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs, classifying cannabis and restricting trade to medical and scientific purposes ^[2].
• 1925–1928: Japan begins tightening hemp licensing; colonial administration in Korea implements permit systems for hemp farming Weak / limited.
• 1927: Chinese Nationalist government consolidates power; drug control becomes a policy priority, though cannabis receives less attention than opium.
• Late 1920s: Scattered police reports in major East Asian cities document cannabis seizures, indicating underground trade but no major organized market Weak / limited.
• 1930: Japan's revised narcotics framework strengthens cannabis controls across Japanese territories Weak / limited.

Historiographic Gaps

The history of cannabis in 1920s East Asia remains poorly studied in English-language scholarship No data. Most available sources are secondary accounts or fragmentary colonial records. Chinese-language, Japanese-language, and Korean-language primary sources—government documents, newspapers, agricultural records—exist but are not widely translated or synthesized.

A significant gap is the absence of social history: we know little about how ordinary people in rural or urban areas experienced the shift from open hemp cultivation to licensing. Were there organized resistance movements? Did farmers view licensing as onerous? These questions remain largely unanswered No data.

Another limitation: the conflation of cannabis with opium in contemporary accounts. Many 1920s reports on 'drug use' in East Asia focus primarily on opium and morphine; cannabis, when mentioned, is often bundled alongside without distinction, making it hard to assess its actual prevalence or cultural meaning.

Finally, most English-language scholarship on East Asian drug history focuses on the opium trade; cannabis receives passing mention or is omitted entirely. A rigorous social and policy history of East Asian cannabis in the 1920s—drawing on translated primary sources and archival materials—remains a desideratum for future research.

Sources

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