Problem Collection for Japan

History and System

The Japanese Mathematical Olympiad was officially established in 1991, although a contest of the same format was also held in 1990 as the IMO team selection test. It is regularly held in two rounds. The first round takes part in January and consists of a set of 12 shorter problems which are to be answered without presenting the work; the final round, held on a national holiday on February 11, consists of five problems.

Japan at International Competitions

Japan has participated at IMO since 1990. In the recent history the best success of the team at IMO is the 6-th place in 2007.

Problems

The total number of available problems is 100.

1990    MO Final    1991    MO Final    1992    MO Final    1993    MO Final    1994    MO Final    1995    MO Final    1996    MO Final    1997    MO Final    1998    MO Final    1999    MO Final

2000    MO Final    2001    MO Final    2002    MO Final    2003    MO Final    2004    MO Final    2005    MO Final    2006    MO Final    2007    MO Final    2008    MO Final    2009    MO Final

2010    MO Final  2011    MO Final  2012    MO Final  2013    MO Final  2014    MO Final  2015    MO Final  2016    MO Final  2017    MO Final  2018    MO Final  2019    MO Final

Thanks to Viktor Dremov for helping us correct formulations to many of the problems.