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Monograph Series · Third series › Part II Fact-finding and the control of the hearing › III-13 · First edition

When There Is Loss but the Amount Is Unknown: The Court's Power to Assess Damages

Is compensation possible even when the amount of loss is difficult to prove precisely?

Part
Part II Fact-finding and the control of the hearing
Sections
6 sections
Length
about 27,600 words · 2 h
As of
2026-10-15
Volume contents
  1. Abstract
  2. Synthetic case
  3. 01The Order of Occurrence and Amount
  4. 02Difficulty Arising from the Nature of the Case
  5. 03The Proof to Be Urged First
  6. 04Circumstantial Facts and a Reasonable Amount
  7. 05The Scope of Damages and Reduction
  8. 06The Endpoint of the Reasons for Assessment

Abstract

This volume asks whether compensation is possible even when the amount of loss is difficult to prove precisely. Relaxing the assessment of the amount does not exempt the occurrence of loss from proof. Only by separating the stages of occurrence, scope, amount, and reduction can the recognition of a reasonable amount avoid becoming an arbitrary figure. The path to relief opens where the occurrence of loss is recognized, proof of the specific amount is extremely difficult owing to the nature of the case, and the circumstantial facts to be used have been heard, and closes where the occurrence of loss itself is not recognized, so that there is no premise for determining the amount of damages under the provision relaxing proof of the amount. The six sections address, in turn, the order of occurrence and amount, difficulty arising from the nature of the case, the proof to be urged first, circumstantial facts and a reasonable amount, the scope of damages and reduction, and the endpoint of the reasons for assessment. The strongest counterargument is as follows. If an exact amount is required, the party that caused the loss may benefit from the lack of records. The substantive discussion of reconstructing fund flow tables, the amount of gain from crimes, and the presumption of securities losses is not addressed in this volume.

Synthetic case

The whole volume follows this invented case. It is not a real matter, and its facts are not legal findings.

The occurrence of Plaintiff A's loss is recognized, but because some transaction records are missing, the specific amount is difficult to establish.

6 sections and their questions

  1. 01The Order of Occurrence and Amount

    Is the occurrence of loss also denied on the ground that the amount could not be established?

    20 min
  2. 02Difficulty Arising from the Nature of the Case

    Can a reasonable amount always be determined when the materials are insufficient?

    20 min
  3. 03The Proof to Be Urged First

    May the court dismiss the claim immediately when proof of the amount is insufficient?

    20 min
  4. 04Circumstantial Facts and a Reasonable Amount

    From what is a reasonable amount derived?

    21 min
  5. 05The Scope of Damages and Reduction

    Is every recognized disadvantage compensated in the same manner?

    19 min
  6. 06The Endpoint of the Reasons for Assessment

    How should the uncertainty of the amount be reflected in the conclusion?

    20 min
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