Damages in Japanese Law

Introduction

The law of damages in Japan governs the monetary compensation recoverable for breach of contract and for tortious conduct. The Civil Code establishes two principal regimes: contractual damages (Articles 415–422) and tort damages (Articles 709–724). While the two regimes share common principles, they differ in significant respects, including the standard of causation, the scope of recoverable loss, and the limitation period.

The fundamental purpose of damages in Japanese law is compensatory. Punitive damages are not recognised, and the Japanese legal system maintains a strong hostility toward awards that exceed the plaintiff’s actual loss. The exclusive function of damages is to place the plaintiff in the position that the plaintiff would have occupied but for the defendant’s wrongful conduct.

Types of Damages

Compensatory Damages (Jissai Songai)

Compensatory damages constitute the mainstream of Japanese damages law. They are further divided into three categories: positive damage (sekkyoku songai) — actual loss suffered by the plaintiff, such as damage to property or medical expenses; negative damage (shōkyoku songai) — loss of profits or income that the plaintiff would have earned but for the defendant’s conduct; and non-pecuniary damages (isharyō) — compensation for pain, suffering, emotional distress, and loss of enjoyment of life.

Nominal Damages

Japanese law does not recognise a general right to nominal damages. Where the plaintiff proves a breach of contract or a tort but cannot prove actual loss, the court will typically award only token compensation or no compensation at all. This approach reflects the compensatory orientation of the Japanese damages system.

Punitive Damages

Punitive damages (bakushōteki songai baishō) are not available under Japanese law. Japanese courts have consistently rejected arguments that punitive damages should be recognised under the Civil Code, holding that the purpose of civil damages is to compensate the victim, not to punish the wrongdoer.

The rejection of punitive damages has significant implications in the conflict of laws context. In the Mankatsu line of cases, Japanese courts have held that foreign judgments awarding punitive damages are contrary to Japanese public order (Article 118 of the Code of Civil Procedure) and will not be enforced in Japan to the extent that the award includes a punitive element. Some lower courts have permitted enforcement of foreign punitive damages awards where the punitive component is not clearly separable from the compensatory component, but the prevailing view is that punitive damages are unenforceable as a matter of Japanese public policy.

The Calculation of Compensatory Damages

Personal Injury and Wrongful Death

Japanese courts have developed standardised calculation formulas for personal injury and wrongful death cases. The calculation of lost earnings (shitsugyō songai) is based on the victim’s income at the time of the injury, the victim’s likely working life, and a standardised coefficient of living expenses (seikatsuhi kōjo) — the percentage of income that the victim would have spent on personal living expenses and therefore cannot be claimed by surviving dependents.

The coefficient of living expenses varies depending on the victim’s family situation. For a single victim, the coefficient is typically 30% to 40% of income. For the primary breadwinner of a family, the coefficient is 30% to 50%. For a dependent spouse who predeceases the breadwinner, the coefficient is lower.

Non-Pecuniary Damages (Isharyō)

Non-pecuniary damages for personal injury and death are calculated according to standard amounts that have been developed through judicial practice. These amounts are periodically adjusted to reflect changes in economic conditions and social perceptions.

The standard amounts for death cases are as follows:

• Loss of a spouse: approximately 20 million yen
• Loss of a child: approximately 28 million yen (reflecting the particularly severe emotional harm suffered by parents)
• Loss of a parent: approximately 20 million yen to 28 million yen depending on the age of the deceased and the ages of the surviving children

For personal injury not resulting in death, non-pecuniary damages are calculated according to the nature and severity of the injury. The courts have developed a schedule of standard amounts for common injury types, such as fractures, spinal cord injuries, brain damage, and psychological trauma. These amounts range from several hundred thousand yen for minor injuries to tens of millions of yen for catastrophic injuries.

Katsuko Payments

Katsuko (solatium) is a distinct form of non-pecuniary damages payable by the state or by designated entities in specific statutory contexts. The most prominent example is the katsuko payment under the Automobile Liability Security Act, which provides a fixed solatium to the victims of motor vehicle accidents or their families, supplementing the damages recoverable from the tortfeasor.

The Limitation of Damages: Article 416

Article 416 of the Civil Code imposes a foreseeability limitation on contractual damages. Inspired by the English rule in Hadley v. Baxendale (1854), Article 416 provides:

• Paragraph 1: “The claim for damages for non-performance of an obligation shall be limited to such damages as would ordinarily arise from such non-performance.”
• Paragraph 2: “The obligee may also claim damages that have arisen from special circumstances if the obligor was aware or ought to have been aware of such circumstances.”

The article thus establishes two categories of damages: ordinary damages (which are always recoverable upon proof of causation) and special damages (which are recoverable only if the defendant had actual or constructive knowledge of the special circumstances that gave rise to the loss).

Japanese courts have applied Article 416 beyond its contractual context to limit damages in pre-contractual liability cases, drawing on the good faith principle (Article 1(2)). The article has also been applied by analogy in tort cases, although the primary limitation on tort damages is the requirement of proximate causation.

Mitigation of Damages

The duty to mitigate damages (songai keigen gimu) is recognised in Japanese law as a general principle derived from the good faith requirement (Article 1(2)). The plaintiff must take reasonable steps to minimise the loss flowing from the defendant’s breach or tort. Where the plaintiff fails to do so, the damages recoverable will be reduced to the extent that the loss could have been avoided.

The mitigation principle operates in both contractual and tort contexts. In contract, a party who fails to take reasonable steps to find a substitute transaction following the other party’s breach may find its damages reduced. In tort, a plaintiff who fails to seek timely medical treatment following an injury may similarly have damages reduced.

Conclusion

The Japanese law of damages is characterised by a strong compensatory orientation and a systematic approach to calculation. The standardised formulas for personal injury and death, the schedules of non-pecuniary damages, and the foreseeability limitation under Article 416 combine to produce a damages system that is relatively predictable and consistent. The rejection of punitive damages and the limited recognition of nominal damages reflect the Japanese legal system’s conception of civil liability as concerned exclusively with compensation for actual loss.