WWII Sites in Tokyo ?

[Untersharfuhrer]

I will be making my 1'st visit to Tokyo next week, will be there for 4 days. I doubt that I will be able to even find my way around, but if I get lucky and get acclimated, do any of ya'll know of any remaining WWII sites there, and how to get to them (via subway) ? Also anywhere to buy militaria?

Thanks in advance,

Steve (Untersharfuhrer)