The medal. From my admittedly limited experience, it looks like an Iron Cross. It has 'Japan' engraved in the corner on the back. I found it when cleaning out my late grandmother's home. Any help identifying it would be greatly appreciated!
Looks like it's a reproduction, possibly from a keychain. Here is a previous post about one that looks similar, including Japan on the back...
https://www.reddit.com/r/whatisthisthing/comments/2kwe1k/any_idea_what_this_is_some_sort_of_pendant/