The head of the cabinet government who oversees the administration of the country; commonly abbreviated as 'prime minister' or 'PM'.
総理大臣は国会で政策について答弁した。
The prime minister answered questions about policy in the Diet.
外交儀礼では総理大臣が外国の首脳と会談する。
In diplomatic protocol, the prime minister holds talks with foreign heads of state.
内閣総理大臣（通称総理）は国家の代表として演説した。
The Prime Minister (officially the Chief Cabinet Secretary) delivered a speech as the representative of the nation.