Questions about Japan?

Question:

I'm doing a MUN (mock united nations) and my country is Japan. I need to do a project on it but I can't seem to find answers to these questions:

-Example of names of military "hardware"
-Friendly borders?
-Worst enemy?
-All of Japan's major problems?

If you could answer these, it would help a lot.

Answer:

-Example of names of military "hardware": Self Defense Force?
-Friendly borders? : Japan does not have national border on land.
-Worst enemy?: North Korea?