The yakuza’s diversified criminal economy

The yakuza’s diversified criminal economy is presented not as a single trade in illicit drugs but as a flexible business system that drew profit from property, extortion, front companies, and legitimate-looking services. Kaneko’s explanation of the Sumiyoshi-kai gives the account its clearest shape: criminal enterprise could operate through violence and intimidation, but also through contracts, debts, real estate, and information.

Revenue Beyond Stimulants

When Jake Adelstein questioned the official claim that most yakuza income came from selling stimulants, Kaneko agreed that the figures did not capture the breadth of the organization’s business. He described a range of property schemes. At its height, the Sumiyoshi-kai helped drive up land prices in exchange for kickbacks from realtors or banks. It also made money by forcing tenants from properties that would be more valuable if sold openly, a practice known as land-sharking. Because Japanese tenant protections made it difficult for owners to remove residents, there was demand for this service.

The group also interfered with public auctions of seized property. Yakuza might occupy buildings to obstruct a sale, sometimes acting for an original owner who hoped to buy the property back cheaply, and sometimes buying it themselves before selling it through a front company. Illegal waste disposal and protection payments from Omiya’s sex industry added further sources of revenue. These activities were distinct, but they shared a commercial logic: the organization profited by controlling access to property, disrupting ordinary transactions, or supplying services that lawful actors could not easily provide.

Extortion and the Uses of Respectability

Kaneko identified extortion as the organization’s largest source of cash and described it as a business built around information. The contrast with Jake Adelstein’s work was deliberate: journalists sold damaging information by publishing it, while the Sumiyoshi-kai was paid to keep damaging information out of the paper. In practice, the group targeted businesses and businessmen with compromising secrets. It also approached financially troubled companies with offers of help, then stripped them of assets and real estate, sometimes using them in fraudulent ventures. The companies and their executives could participate willingly, expecting to receive a share before the enterprise collapsed.

The property and credit mechanisms turned that arrangement into a chain of transactions. The group used a company’s real estate to secure loans from midsize banks, which went unpaid. After bankruptcy and seizure, yakuza disrupted the auction, acquired land and buildings at low prices, and resold them—or let a third party buy them in exchange for a kickback. The scheme depended not on a single act of force but on the ability to move between corporate debt, bankruptcy, property seizure, and interference with the market that was supposed to dispose of the assets.

The same breadth appeared in the Sumiyoshi-kai’s front companies. Its businesses included temporary staffing agencies, loan-sharking operations, and an insurance company that filed false claims against legitimate insurers. A collection agency recovered bad debts for lawful consumer-loan firms; the organization also scalped tickets and ran pawnshops that trafficked in stolen goods. Its talent agency supplied young women to pornography producers, whom the account says were paid well and were not coerced. Other operations included adult-goods shops, sales of teenage girls’ used underwear, transportation, trucking, shipping, and security for large events. As a construction contractor, the group could subcontract all the work and retain the difference between the contract price and the subcontractor’s fee.

Even political organization could serve the same financial purpose. The Sumiyoshi-kai’s sham political group secured a tax break and offered a less conspicuous means of extracting money from companies: businesses were charged exorbitant prices to subscribe to its newsletter, turning hush payments into apparently ordinary commercial transactions. Across these ventures, the organization’s criminal economy worked by placing illicit demands inside recognizable forms of business—insurance claims, debt collection, staffing, contracts, subscriptions, and property deals—so that profit could be drawn from both illegal activity and the ordinary institutions with which it intersected.

Kajiyama’s Franchise Model

The account of Susumu Kajiyama shows how this diversified economy could be organized as a network of businesses rather than a single criminal operation. He was a yakuza, but several hundred non-yakuza also worked in the loan-sharking industry around him. His empire included real estate and construction firms, a marina share, and a sex parlor; employees were also directed to make donations to a religious corporation in Hokkaido, with agency managers arranging meetings at a Tokyo hotel. These were not incidental sidelines: the businesses and their workers formed channels through which money could be extracted and redirected.

The SK companies extended that system into ordinary routines. Shops using Kajiyama’s loans were required to buy lunches from SK Shokuhin, while managers had to dine at a Korean barbecue restaurant owned by one of his associates. Employees and managers were sent to designated hot springs and beach resorts, with travel and accommodation arranged through the network. The purchases and trips moved proceeds through businesses presented as everyday providers, making laundering part of the organization’s internal commercial structure.

SK Finance in Shinjuku demonstrated how closely that structure could resemble lawful consumer finance. It displayed a Tokyo government license and the industry’s tōichi rating, despite the absence of a meaningful background check for most firms receiving that designation. The company also operated in real estate: property could be taken as loan collateral, seized after default, and sold without a middleman sharing the proceeds. Kajiyama’s operation thus linked lending to property acquisition and leasing, while the licensed appearance helped make the arrangement look routine. A separate account placed him in Las Vegas, where he reportedly lost a couple of million dollars at the MGM Grand; the money may also have served a laundering purpose, and he was said to use a safe-deposit box and overseas accounts. Together, these details present a business model that joined domestic lending and real estate to the movement of funds abroad.

Transnational Networks and the Value of Information

The account extends this commercial picture beyond domestic front companies. Helena distinguished her own chosen work from the exploitation of women recruited overseas by Slick and Viktor, who operated clubs and brought women to Japan through advertisements or brokers, often from poorer countries. Promised earnings gave way to undisclosed costs and dependence on the operators; women who tried to leave or seek help could find their options sharply constrained. The contrast shows how the same industry could encompass both paid work undertaken by choice and a recruitment system that trapped others in exploitative conditions.

Information, too, could function as a bargaining asset across borders. In 2006, Jake Adelstein learned that the FBI had facilitated Tadamasa Goto’s entry into the United States. The reported exchange included names of gang leaders, documents, lists of front companies, and information about financial institutions used by the Yamaguchi-gumi to launder money. The disclosure presented access to the international financial system not simply as a matter of moving funds, but as something that could be negotiated through intelligence—and carried serious risks for a person who betrayed organizational ties.