our country; one's own country
A somewhat formal or literary expression for 'our country' or 'my country', used in speeches, writing, or patriotic contexts. In casual speech, 自分の国 or 日本 are more common.
I want to introduce our country's culture to the world.
彼は我が国の将来について熱く語った。
He spoke passionately about the future of our country.