April, 2004 The City of Tokyo, together with JAAF(Japan Association Of Athletics Federations), starts discussions towards holding a metropolitan marathon in 2005.
October 20, 2005 The City of Tokyo and JAAF sign a Basic Agreement on the TOKYO MARATHON.
February 18, 2007 Tokyo Marathon 2007 Race Day
February 17, 2008 Tokyo Marathon 2008 Race Day
March 22, 2009 Tokyo Marathon 2009 Race Day
February 28, 2010 Tokyo Marathon 2010 Race Day
February 27, 2011 Tokyo Marathon 2011 Race Day(Tentative)