Japanese authorities have dismantled a large-scale illegal online gambling network suspected of handling over JPY 90 billion (approximately US$628.5 million) in deposits. This significant crackdown has led to the detention and indictment of multiple individuals, coinciding with recent legislative efforts to tighten controls on online gambling in Japan.

A joint investigation led by the Kanagawa Prefectural Police uncovered the operation, which reportedly saw JPY 2.6 billion (approximately US$18.03 million) used for online gambling by around 3,600 customers within just one month. The alleged crimes spanned a period of 12 months, extending up to July of last year (July 2024).

Inside the Operation: Cash-for-Points System

The investigation has focused on individuals including Yoshinori Kurata, a 42-year-old company executive from Chuo Ward in Tokyo, and Hideaki Yoshihara, a 44-year-old office worker from Bunkyo Ward, along with seven others. At least three individuals, including Kurata, have been formally indicted on charges of money laundering and illegal gambling activities.

Authorities reportedly believe the group managed a cash-for-points exchange system, where customers deposited money that was then converted into “points” for betting on online overseas casinos. This alleged illegal operation, described as similar to using tokens at an arcade, is believed to have generated millions of dollars. The group allegedly encouraged gambling through targeted promotions or platforms that made betting seem more accessible and secure.

Scale of the Illegal Activity

The scale of this alleged operation is significant, with JPY 90 billion reportedly flowing through the network. In a single month, JPY 2.6 billion was reportedly wagered online, demonstrating what authorities suggest was a very effective and well-run illicit operation. The Kanagawa Prefectural Police, aided by cybercrime units, reportedly employed surveillance, wiretaps, and banking audits to track down the group. Evidence seized included laptops, phones, banking transaction records, and access logs to the casino platform, which helped connect customer activity to the accused operators. Three of the nine individuals have been indicted for money laundering involving over JPY 4.2 billion (approximately US$29.12 million). The others are being held on suspicion of organised habitual gambling and related offences, with authorities indicating that more indictments are potentially forthcoming. Reports indicate the group made use of an advanced digital infrastructure to manage high transaction volumes, possibly involving cryptocurrency transactions, blockchain wallets, or anonymous payments, and may have utilised automated payment gateways and AI-driven monitoring systems, though these details have not been officially confirmed.

Legal Implications and Policy Context

Online casinos are strictly illegal for Japanese citizens under the country’s Penal Code, with legal gambling options limited to government-sanctioned activities like pachinko, horse racing, and lotteries. The suspects are accused of “organised habitual gambling,” a serious offence that, if convicted, could lead to years in prison, hefty fines, and lifetime bans from the financial sector.

This crackdown occurred just two days after Japan’s lower house of parliament passed a bill aimed at further tightening regulations on online gambling. The new law intends to strengthen data exchange between enforcement agencies, penalise intermediaries in gaming activities, and regulate digital payment providers more closely. It is suggested that this major case may have served as a catalyst for legislators to enact these more stringent rules. A National Police Agency survey released in March 2025, as reported by iGaming Times, estimated that approximately 3.37 million people in Japan accessed online casinos, with total annual wagers reaching around JPY 1.2 trillion (approximately US$8.4 billion), highlighting the scale of the illegal market. Looking ahead, Japan’s first land-based integrated resort (IR) with a casino, MGM Osaka, is set to open in late 2030.

The large-scale crackdown on the alleged JPY 90 billion online gambling network by Japanese authorities underscores the country’s intensified efforts to combat illicit gaming. The detentions and indictments, particularly the focus on organised habitual gambling and money laundering, align with recent legislative moves to strengthen online gambling controls, reflecting a determined push to curb illegal activity and its wider societal impacts in Japan.