ぼこう母校bokou
1.

The educational institution where an individual has studied and completed their education, often evoking a sense of nostalgia or pride.

2.

A person's former school, representing their academic beginnings and experiences, which forms a significant part of their identity.

3.

The school that someone attended, which contributes to their personal and professional development, and is often referenced in the context of alumni connections.

Example:

私たちは母校を訪れた。