The ambassador was recalled from Warsaw.
The ambassador will be recalled from his present post soon.
The American Ambassador was invited to the gathering.
He was accredited to the United States to represent Japan.
He has just been appointed the U.S. Ambassador to Japan.
Do you know who is the Japanese ambassador to France?
He was appointed ambassador to Britain.
Do you know who the British Ambassador to Japan is?
Mr Brown was acting in the capacity of ambassador.
The government appointed Mr Brown ambassador to Peru.