じが自我jiga
1.

A concept in philosophy representing the individual as a distinct entity recognized in relation to everything else in the universe, emphasizing self-awareness and existence as a thinking being.

2.

An awareness of oneself as an individual with defined roles and responsibilities within a social context, embodying the idea of self in relation to societal norms and expectations.

3.

In psychology, the collective awareness and perception of oneself, influencing identity and personal morality while forming part of the personality along with the id and superego.

4.

The central aspect of consciousness that differentiates oneself from external objects and others, acting as the basis for thought, intention, and moral actions.

Example:

彼らは喜びのあまりすっかり自我をわすれた。

じがいしき自我意識jigaishiki
1.

A heightened awareness of oneself as a separate individual, often accompanied by feelings of self-doubt or concern about others' perceptions.

2.

The state of being acutely aware of one's behaviors, thoughts, and appearance, leading to a focus on how one is perceived by others.

3.

An introspective consideration of one’s own identity and existence, often triggered by social interactions and environments.

4.

A psychological condition where an individual becomes overly preoccupied with their own thoughts and emotions in relation to how they are viewed by the outside world.