He had no choice but to quit his job.

Yusokuyomi refers to the special reading of specific kanji.

He is interested in special readings of kanji, and studies kanji every day.

He is a person who can't read the room, so he struggles to match the atmosphere of the place.

In this situation, it's inevitable that he resigns.

He had no choice but to quit his job.

In this situation, he has no choice but to act.

Due to his illness, he had no choice but to take a day off from work and rest at home.

He was forced into a situation where he had no choice but to quit his job.

He was placed in a situation where he had no choice but to continue his job.