I bought a new chair.
This chair is comfortable to sit on.
Figurative use referring to a job, position, or role within an organization. Often used in phrases like 椅子を狙う (aim for a position) or 椅子を争う (compete for a post).
He is aiming for the president's position.
There are many candidates competing for the ministerial post.
He sat down in the chair next to the sofa.
He is aiming for the department manager's position.
When my name was called, I got up from my chair.
The two of them are competing for the president's seat.
stool; round stool
sofa; couch; lounge chair