I've made Japanese(Romaji-Hepburn)-English dictionary. It's here
https://yadi.sk/d/KRnGFBoMw2FzLg
P.s. Hepburn romanization is popular, but it has many variations. I've made it for my Japanese texts with romanization.
If you want to use romanization that Google translator makes, you need to replace in the texts made by Google translator all vowels with macrons:
ā with aa
ē with ee
ō with oo
ū with uu