After pulling off the biggest upset of the Rugby World Cup so far by defeating Ireland, Japan still have work to do toward their goal of advancing from the pool stage for the first time, captain Michael Leitch warned Sunday."Of course, on the inside I'm ecstatic," the New Zealand-born backrower said when asked at a press conference about the Brave Blossoms' low-key celebration following their historic 19-12 victory at Shizuoka Stadium Ecopa the previous day."But it's very important that we now turn to the Samoa game. If we lose our next two games, then yesterday's win will have been for not…READ FULL ARTICLE