In Sunday's first of the four matches, Keysher Fuller took full advantage of a defensive lapse to score in the 81st minute and keep their dream of reaching the last 16 knockout stage alive.
Japan failed to maintain the same level of play that fetched them the stunning win over Germany, who face Spain later in the evening.
Costa Rica's win is another big shock at the World Cup and nobody had fancied the Central American country Costa Rica's comeback after the hammering they got at the hands of Spain in the last match. Their comeback win is one of the many great stories of the World Cup.
Japan were the better team but were unable to break down Costa Rica, who scored through their only shot on target of the match and of the tournament.
The win ended a seven-match winless run at the World Cup, with their last World Cup victories dating back to the 2014 group stage, against Uruguay (3-1) and Italy (1-0) respectively and they have beaten Japan for the first time.
Japan were the better team but were unable to break down Costa Rica, who scored through their only shot on target of the match and of the tournament.
This story has not been edited by Cricketnmore staff and is auto-generated from a syndicated feed