When we refer to lucky events and unfortunate events, we often talk as if "luck" is a type of resource. Although
"luck" is often expressed in such a way, the matter of why it is referred to this way has not been considered.
Therefore, by analyzing the circumstances that luck is approached as a "luck resource" and its structure in story form,
the interesting points to the story were analyzed. In Study 1, most thought of "luck" as a negative factor when it came
to winning or losing a prize. In Study 2 and 4, free descriptions were collected and analyzed by both sides, positive
(increase in luck) and negative (decrease in luck). As a result, although positive descriptions were less than the
negative descriptions, but when asked for the reason of the positive description, it was found that it was because the
result could not be predicted, and there for resulting in a happy ending. In conclusion, what makes the story of "luck
resource" is that "luck is considered as a negative factor. In context, "luck" is considered valid for positive results,
perspective for an uncertain effect may be changed. Furthermore, as invalid use of "luck" may impose selfresponsibility, there lies "justification of luck or tsuki" based on the retribution-view.
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