せい所為seiせえ所為see
1.

A term used to describe the actions or deeds that lead to a specific outcome, often with a focus on the causal relationship between those actions and the resulting effects.

2.

Refers to the underlying cause or reason for a particular event or situation, particularly when it implies an adverse or undesirable outcome.

3.

Used to indicate the responsibility or accountability for a negative consequence, often in the context of blaming someone or something for that outcome.

4.

Denotes an act or behavior that is linked to a notable or significant result, sometimes with an implication of supernatural or extraordinary origin.

Example:

あなたの頭痛は過労のせいだ。

しょい所為shoi
1.

A manifestation of one’s actions or behavior that leads to a specific outcome, often carrying a connotation of blame or responsibility for negative consequences.

2.

The underlying reason or cause behind a particular event or situation, suggesting a connection between actions and their results, particularly in contexts where those results are undesirable.

3.

An act or deed that is typically associated with human effort or intention, emphasizing the personal involvement in bringing about certain effects or outcomes.