Portal:Japan/Anniversaries/April/April 9

702 - Japan's first legal system of measurement is implemented. (Traditional Japanese Date: Eighth Day of the Third Month, 702)
1890 - A ceremony is held for the opening of the first Lake Biwa Canal.
1935 - Three of Minobe Tatsukichi's publications setting forth his theory that the emperor is merely a legal figure who exercises power on behalf of the people in whom sovereignty resides (the imperial institution theory) are outlawed. Minobe eventually quits the House of Peers.
1939 - The first group recruitment train, carrying 580 students looking for work, travels from Akita to Ueno.
1952 - A Japan Airlines passenger plane crashes into Mt. Mihara on the Izu Peninsula, killing 37 people, including entertainer Ōtsuji Shirō.
1981 - An American nuclear submarine collides with a Japanese cargo ship, the Nisshōmaru.
1992 - Singer Fujiyama Ichirō becomes the ninth person to be awarded the National Honor Award (国民栄誉賞, Kokumin Eiyō-shō^?).