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.

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