Japan potentially jeopardized their path to the World Cup round of 16 Sunday by falling 1-0 to underdogs Costa Rica in their second Group E game in Qatar.Coming off a historic 2-1 win over Germany in Wednesday's opening clash, the Samurai Blue let slip a golden opportunity to put one foot in the knockout phase against the Central Americans at Ahmad Bin Ali Stadium in Al Rayyan.Hajime Moriyasu's men were on top for most of the match before Keysher Fuller's goal against the run of play in the 81st minute gave Los Ticos the lead with their lone attempt on target.The 28-year-old defender curled…READ FULL ARTICLE