A Chronicle of Japan's Vanished Tax-Saving Schemes

How it worked: Because the inheritance-tax basic exemption and non-taxable allowances increase with the "number of statutory heirs," a Showa-era staple was to adopt many grandchildren or relatives to inflate the deductions. Adoptions of 10 or more children are said to have actually existed.

Cause of death: The December 1988 reform limited the adopted children that can be counted in the tax calculation to "1 if there is a biological child, 2 if not." This is still the rule today (there is also the 20% surcharge for grandchild adoptees). It is a classic of regulation whose traces still remain in how the basic exemption works.

How it worked: At the time, if a resident overseas received a gift of "foreign-located assets," no Japanese gift tax applied. The founder of a major consumer-finance firm posted his eldest son to Hong Kong and gifted him about ¥165 billion worth of shares in a Dutch company (foreign-located assets). The tax authorities argued the son's domicile was "effectively in Japan" and assessed roughly ¥133 billion in additional tax.

Outcome: The Supreme Court (February 18, 2011) held that "domicile means the objective base of one's life," and from the reality of the Hong Kong stay, the taxpayer won on reversal. The state had to return the roughly ¥133 billion in principal tax plus about ¥40 billion in refund interest — one of the largest "state defeats" in tax history[case commentary].

Afterward: But the law was reformed at once, and successive tightenings of the residence requirement for escaping tax on overseas gifts mean that today both the donor and the recipient must have resided overseas for more than 10 years (see a comparison of inheritance taxes around the world). It is a case that embodies "an individual can win in court, but a scheme is always killed by legislation."

How it worked: Because rent on a rental apartment is tax-exempt sales, the consumption tax on construction costs is not normally refunded. So a loophole became hugely popular: right after completion, you would place a vending machine on the site to create a "period of taxable sales only," and receive a refund of the consumption tax on construction costs (on the order of millions of yen).

Cause of death: The FY2010 reform closed the first wave → a modified version emerged that created taxable sales by repeatedly buying and selling gold bullion → the FY2020 reform denied the "input tax credit for residential rental buildings" itself, completely ending the cat-and-mouse game. It is a textbook case where, when a loophole is closed, it is not the method but "the entrance itself" that is erased.

How it worked: A tower apartment's assessed value for inheritance tax is often only about 30–40% of its market price, so by buying a high floor with borrowed money you could compress inheritance tax through the valuation gap plus the debt deduction. A representative case: a person in their 90s bought about ¥1.4 billion worth with a loan and filed inheritance tax as "zero."

Cause of death: The Supreme Court (April 19, 2022) allowed the application of the exception provision of the Basic Valuation Circular, "General Rule 6," and approved taxation based on an appraisal (about ¥1.27 billion) rather than the circular valuation = upholding roughly ¥300 million in additional tax[case commentary]. Furthermore, from January 2024 a new rule for apartment valuation (at least 60% of the theoretical market-price value) was introduced, shrinking it structurally too. "Even a valuation done by the rules can be denied under a general provision if it goes too far." It is a case that showed the terror of retroactive risk.

The profit-compression family for corporations is a history of the abolition and revision of "tax-deferral" devices. Movie film leasing and aircraft leveraged leasing (closed in 2005) → full-loss insurance (the 2019 Valentine's Day shock) → the name-change plan for low-surrender-value insurance (closed in 2021) → drones, scaffolding, LED (2022) → coin laundries, mining (2023). The mechanism of each, and "how to spot the product that will be sold to you next," are explained in detail in our sister article Why "tax-saving schemes" get crushed.

How it worked: Until March 2003 (Heisei 15), social insurance premiums fell in earnest only on monthly pay, and bonuses carried a "special premium" of merely 1%. So simply by "keeping monthly pay to a minimum and paying most of the annual salary as bonus," both the company and the individual could dramatically cut premiums — a simple yet enormous loophole widely used, especially at companies with annual-salary systems.

Cause of death: The introduction of the "total-remuneration system" in April 2003 applied the same premium rate to bonuses as to monthly pay, and it vanished overnight[Ministry of Health, Labour and Welfare]. There is still a lingering trace of compression using the cap on the standard bonus amount (¥1.5 million per payment for employees' pension), but it comes at the cost of investigation by the pension office and a lower future pension (how social insurance premiums on bonuses work).

Where "escaping national/social insurance" stands today: (1) Switching from national health insurance to social insurance via a micro-corporation is still legal today, but a paper company with no actual business faces the risk of denial and retroactive enrollment. (2) A company's trick of "disguising employees as freelancers" to escape the social-insurance burden is illegal, and crackdowns continue in which premiums are collected retroactively based on a determination of employee status. (3) The corporate practice of "hiding part-timers inside the ¥1.06 million wall" to keep them out of social insurance is also a vanishing scheme as coverage expands (the phased removal of the company-size requirement).

How it worked: In 2017–2019, when the return-gift competition overheated, some local governments gathered donations with highly cash-convertible return gifts such as Amazon gift cards worth 40–50% of the donation amount. From the user's view, "with an effective burden of ¥2,000 you got hundreds of thousands of yen in gift cards" — alchemy that went beyond tax saving. Izumisano City in Osaka Prefecture, billing it as a closing-down sale, gathered ¥49.7 billion in a year at its peak.

Cause of death: The June 2019 system reform legally set "return gifts must be 30% or less of the donation and limited to local products," ending the gift-card war. Izumisano City, which had been excluded, sued the state, and the Supreme Court (June 30, 2020) ruled that "exclusion on the grounds of past conduct is illegal," giving the city a reversal victory. Yet the regulation itself remained valid — a twisted ending[Izumisano City]. Today's Furusato Nozei rules stand atop the postwar settlement of this war.

Abuse of the "child without a home" special provision (closed in 2018 / Heisei 30): Because a "relative living separately who owns no home" and inherits the family residence can use the special provision for an 80% land-value reduction, a trick became popular of selling one's own home to a relative or one's own company to become a "child without a home" in form → the FY2018 reform tightened it into a requirement that looks even at past ownership history[NTA No.4124].

The general incorporated association scheme (closed in 2018 / Heisei 30): If you moved assets into a general incorporated association with no equity interests, inheritance tax would never apply even as relatives succeeded to the directorships generation after generation. This hole was closed by levying inheritance tax on associations where family-controlled officers are a majority (Inheritance Tax Act Article 66-2).

Shrinking last-minute gifting (FY2023 reform): The add-back of calendar-year gifts just before inheritance was extended from 3 years to 7 years (phased from gifts made in 2024 onward), sharply reducing the effect of "¥1.1 million every year just before death"[NTA No.4161]. The lump-sum gifting of education funds also ends in March 2026, and inheritance planning has fully turned toward "early, steady, and backed by real substance."