In Japanese, due to the special nature of the work of the head of government, the prime minister's titles vary depending on context, sometimes demonstrating his/her role. Since the inception of the cabinet system, the prime minister is known in Japanese as Naikaku Sōri-Daijin (内閣総理大臣) whenever he is referred to as the head of the Cabinet. However, this title is usually abbreviated to Sōri-Daijin (総理大臣). Other abbreviations include Sōri (総理), Shushō (首相) or even Saishō (宰相).
