England were humbled on home soil in 2015, finishing third in Pool A, with Wales and eventual runners-up Australia securing progression to the knockout stages.
On Monday, Vunipola was included in Eddie Jones' 31-man squad for the upcoming tournament having starred in Sunday's 33-19 defeat of Six Nations champions Wales.
Despite their disappointment in 2015, Jones' side will be favourites to progress from Pool C, with France, Argentina, United States and Tonga their opponents, and Vunipola does not believe England's failure in the last World Cup will haunt them in Japan.