The Civil Trust Option: A Set of Operating Rules for Cognitive Decline and Multi-Generational Succession

"A family trust is something you set up through a trust company — surely you need substantial assets to use one." We hear this assumption repeatedly from wealthy Chinese residents in Japan. In fact, a Japanese civil trust (family trust) can be established as a contract between family members, without going through a trust bank or trust company. Setting one up is not difficult. Designing one is. A trust is not a tax-saving device — it is a set of operating rules that governs how assets are managed and passed on.

What a Trust Is

Article 2 of the Trust Act defines a trust as an arrangement under which a specified person manages or disposes of property, and takes the actions necessary to achieve a stated purpose. You entrust property to someone you trust, who then manages it according to the rules you set.

Article 3 of the Trust Act provides three methods of creating a trust: by contract, by will, and by self-declaration of trust. Within families, the contract method is by far the most common — and this is what is generally called a "civil trust."

Three Roles

A trust is built around three roles.

Suppose a rental apartment building is placed in trust with the eldest son. The son handles leasing, rent collection, and maintenance, while the rental income flows to the beneficiary — the parent. On the parent's death, the beneficiary automatically becomes the son, and the succession is completed without any estate-division agreement.

Why Consider a Civil Trust

A civil trust proves its worth in two situations.

First, preparing for cognitive decline. Once a person loses legal capacity, they can, in principle, no longer sell real estate held in their name or withdraw their own deposits. The adult guardianship system offers a response, but under the supervision of the family court its basic posture is preservation of assets, with active management and disposition constrained. A trust established in advance allows the trustee — the child — to continue managing and disposing of the property within the defined purpose.

Second, succession instructions that go beyond a will. A will can, in principle, name only the first-generation successor. By contrast, Article 91 of the Trust Act recognizes the "successive-beneficiary trust," under which a new beneficiary acquires the beneficial interest in turn upon the death of the previous one. You can designate yourself as the first beneficiary, your eldest son as the second, and your grandchild as the third — mapping a path of succession across generations. That said, the article limits the trust's effect to the beneficiary who acquires the interest after 30 years have passed from the trust's creation.

The Trustee's Powers and Responsibilities

The trustee has the power to manage and dispose of the trust property and to take the actions necessary to achieve the trust's purpose (Trust Act, Art. 26). At the same time, the trustee bears a set of duties — to keep the trust property separate from their own, and to act faithfully in the beneficiary's interest. Even where a family member serves as trustee, commingling trust property with personal property is not permitted. It cannot be run on a "we're family" basis — a point that demands care at the design stage.

The Limits of a Civil Trust

A trust is not a cure-all. Several points must be understood:

• There is no tax-saving effect. No tax arises at creation if the settlor is also the beneficiary; but when the beneficiary changes, Article 9-2 of the Inheritance Tax Act treats the change as a gift or bequest, triggering inheritance or gift tax. The tax burden itself does not change depending on whether a trust exists.
• Some property does not suit a trust. Farmland, pension entitlements, and rights personal to the holder are, by their nature, difficult to place in trust.
• Setting one up has costs. Designing the trust agreement, preparing a notarized deed, and — for real estate — the registration and licence tax all entail meaningful expense.

Treat It as a Structural Question

In our experience, most succession problems stem not from the difficulty of the measures themselves, but from a failure to map which tool addresses which issue. A civil trust is a structural means of addressing two challenges at once: asset freezing caused by cognitive decline, and succession across generations. Holding business assets through a holding company and personal real estate and financial assets through a trust — combining the mechanisms and drawing the whole picture — is the starting point.

This article provides general information on tax systems and does not constitute individual tax consultation. Specific filings and tax computations are handled by licensed partner tax accountants whom we introduce.