Portal:Japan/Anniversaries/June/June 1

June 1:

Events
 * 1875 - Tokyo Kishōdai, the precursor to the Japan Meteorological Agency, is established.
 * 1888 - The Tokyo Observatory (precursor to the National Astronomical Observatory of Japan) is established.
 * 1897 - Japan's first ironworks, Yawata Iron & Steel, begins operation. Yawata Iron & Steel was merged with Fuji Iron & Steel in 1970 to form the Nippon Steel Corporation.
 * 1903 - Hibiya Park, Japan's first western style park, opens in Tokyo.
 * 1949 - Japan National Railways and the Japan Tobacco and Salt Public Corporation are both established.
 * 1951 - The minting of one-yen aluminum coins begins.
 * 1961 - The Japan Meteorological Agency begins publishing the "discomfort index", based on temperature and humidity. It is said that a discomfort index above 70 makes some people uncomfortable, but a discomfort index above 80 makes everyone uncomfortable.
 * 1972 - The Road Traffic Law is passed, and the famous yellow and green "young leaf" mark, required to be displayed in the window of cars drive by inexperienced drivers, is born.
 * 1980 - A forecast for the chance of precipitation is published in Tokyo for the first time.

Births
 * 1941 - Toyo Ito, architect, designed the Torre Realia BCN and Hotel Porta Fira
 * 1955 - Chiyonofuji Mitsugu, sumo wrestler
 * 1968 - Yui Natsukawa, actress
 * 1976 - Kōhei Murakami, actor
 * 1988 - Nami Tamaki, singer
 * 1990 - Rie Murakawa, voice actress and singer
 * 2004 - Miyu Honda, actress

Deaths
 * 2010 - Kazuo Ohno (b. 1906), dancer

Holidays, observances, and anniversaries
 * 1925 - NHK Radio begins regular broadcasting.
 * 1977 - Mild Seven cigarettes go on sale for the first time.