The day after the Constitution of the Empire of Japan and the election law of the members of the House of Representatives were issued (February 12, 1889), KURODA made the speech called 'speech of the doctrine of superiority' in order to show his attitude to cope with the political parties to the bottom in the luncheon held at Rokumeikan, and on the other hand, he had Shigenobu OKUMA, who was also the former president of the Constitutional Progressive Party, stay in the position of Minister of Foreign Affairs (Japan) to assign the mission to revise the treaty.
大日本帝国憲法、衆議院議員選挙法が公布された翌日（1889年（明治22年）2月12日）、黒田は鹿鳴館で開催された午餐会の席上において「超然主義演説」を行って政党との徹底対決の姿勢を示したが、その一方で立憲改進党前総裁（実質は党首）で外務大臣(日本)の大隈重信を留任させて条約改正の任にあたらせた。