With less than a year until the 2019 Rugby World Cup, Japan coach Jamie Joseph says his team needs to develop depth in key positions if they are to fulfill their ambition of reaching the last eight.Speaking prior to the launch Thursday of events in Japan to mark one year to go before the Brave Blossoms kick off the 2019 World Cup in Tokyo on Sept. 20, 2019, the 48-year-old New Zealander said he is "trying to grow depth in every position, because if we get an injury...it leaves us vulnerable.""One of our weaknesses is we don't have a lot of depth. That's always been a challenge for Japanese …READ FULL ARTICLE