Solution

28136

First name
Iman
School
Cheetham C.E community academy
Country
Age
11

I Know that Japan has 1 more gold meadl but 3 fewer medals than Italy and what I also know is that France has the most bronze medals(18) but fewest gold medals(7).

After ages of trying different combinations, I came up with:

France:
Gold:7
Silver:16
Bronze:18

Italy:
Gold:8
Silver:9
Bronze:10

Japan:
Gold:9
Silver:6
Bronze:10