Also known as The Constitution of the Empire of Japan or the Imperial Constitution.
Japan’s first Diet also convened today, since it was a cavet of the constitution. Put into effect after the Meiji Renewal, this constitution provided a constitutional monarchy based on the Prussian model. Basically, the Emperor of Japan was ruler and exerted considerable political power, but he had to share that power with the elected diet.
This constitution lasted until the Japanese defeat at the end of World War II.
From Hirobumi Ito, Commentaries on the constitution of the empire of Japan,translated by Miyoji Ito (Tokyo: Igirisu-horitsu gakko, 22nd year of Meiji,1889)Hanover Historical Texts Project: http://history.hanover.edu/texts/1889con.html