Japan’s asset price bubble

Japan’s asset price bubble matters in the book not only as an economic boom but as a turning point in the relationship between property, organized crime, and legitimate business. The expansion into real estate during the 1980s helped make property a durable instrument of yakuza power; the subsequent slump did not dissolve those networks. Instead, the book follows their continued presence in property transactions, corporate fronts, and financial schemes.

The boom and its aftermath

The book links the 1980s boom to yakuza groups’ mass movement into real estate and other legitimate businesses. In response to their excesses during that period, the government introduced tough anti-mob legislation in 1992. Yet the law did not make membership in a criminal organization illegal, and police still lacked tools such as wiretapping, plea bargaining, and witness protection. The boom’s legacy was therefore not simply a rise and fall in asset prices: criminal organizations remained legally recognized and able to operate, even as the state tried to curb their activities.

A later best-selling manual for aspiring landlords offers a small but pointed measure of the property market’s changing fortunes. It presented land ownership as a route to wealth, while acknowledging that strong tenant protections could obstruct landlords’ plans. The book’s narrator read its popularity as a sign that Japan’s decade-long real-estate slump might be nearing an end. That tentative prospect of recovery sits alongside the account of how property had already become an arena for organized crime.

Property as a criminal resource

Kaneko described several ways the Sumiyoshi-kai had made money through property. At its height, it helped drive up land prices in return for kickbacks from real-estate agents or banks. It also removed tenants from buildings whose value would rise if sold on the open market, a practice known as jiage, or land-sharking. Because Japanese tenant laws favored renters, this service could be in demand. In other cases, yakuza disrupted public auctions of seized property by moving members into buildings. They might act for an original owner seeking to buy property back cheaply, or acquire the property themselves and pass it to a front company.

The same methods could intersect with struggling businesses and debt. Kaneko described companies whose real estate was used to secure loans from midsize banks that were never repaid. After bankruptcy and seizure, yakuza could interfere with the auction, buy the buildings cheaply, and sell them on or take a cut from a third-party buyer. Property in this account was not merely a speculative asset: it was collateral, leverage over tenants, a target of manipulated auctions, and a route for extracting value from companies.

Front companies and the blurred boundary of business

The scale of the overlap appeared in police figures. A 2006 Tokyo Metropolitan Police list counted roughly one thousand suspected yakuza front companies in greater Tokyo, about one-fifth of them real-estate firms. A 1998 National Police Agency examination had also identified construction, real estate, finance, bars and restaurants, and management consulting as the five leading types of front company. The range suggests how far criminal enterprise could extend into ordinary commercial sectors.

The 2008 Suruga Corporation scandal made the property connection conspicuous. Over several years, the company paid more than 14 billion yen, reported as $146 million, to affiliates of the Yamaguchi-gumi and Goto-gumi to remove tenants from properties it wanted to acquire. Suruga was delisted after the payments came to light. The presence on its board of a former prosecutor and a former National Police Agency Organized Crime Control Bureau bureaucrat further complicated the distinction between the businesses and institutions meant to contain criminal influence.

An economic legacy that outlasted the boom

The book’s account of yakuza enterprise shows the property economy persisting beyond any one cycle. The Sumiyoshi-kai’s activities extended from land-sharking and auction interference to illegal waste disposal, protection payments, staffing agencies, loan-sharking, insurance fraud, debt collection, and construction subcontracting. Its fake political organization could also sell expensive newsletter subscriptions to companies as a less obvious means of collecting hush money. The breadth of these operations places real estate within a wider system of interlocking businesses, rather than treating it as an isolated criminal specialty.

A separate account of Susumu Kajiyama’s loan-sharking empire gives that system a later, highly organized form. His network included real-estate and construction firms, and SK Finance in Shinjuku combined consumer lending with realty. Property could serve as collateral and, if a borrower defaulted, be seized and sold without a middleman taking part of the proceeds. The book does not reduce these later schemes to a direct consequence of the asset-price boom; rather, it shows how the boom’s property-centered economy left behind practices and business networks that continued to make land useful for acquiring, securing, and laundering money.