Defending World Cup champions South Africa, current world No.1 Ireland, world No.5 Scotland and Romania make up the pool.
Coach, Toutai Kefu has described it as a pool of death.
But he believes the team can cause upsets if they click on the day.
Tonga has competed in every Rugby World Cup since the first one in 1987, except for 1991 when they failed to qualify.
Their best performances were in 2007 and 2011.
In 2007 they finished third in their pool behind England and South Africa after wins over Samoa and the United States.