How to say "Next time" in the past tense?

Question

I'm a bit confused on how to use the expression "The next time" in chinese. I originally wrote (after going to Kigali for the first he realized there were no ethiopian restaurants) 于是， 他下次回基加利时， 就决定开这个餐厅。
But my friend told me that a better way of saying it is 他再次回基加利时

Answer 1

下次 : next time

再次 : once again

You said it's in the past tense, I think 再次 is better.

于是，当他再次回到基加利时，就决定开这个餐厅。

Answer 2

'下次' means in the future. '再次' is better here.

Answer 3

Both 下次 and 再次 suggest that he returned to Kigali more than once. If that's not what you mean, use neither: 他回到基加利後， 就决定开这家餐厅

Note that you use 家 with shops, not 个