How can I use my VZW Note 3 in Japan?

[asmallchild]

Anyone have any experience using the VZW Note 3 in Japan?

Do I need to call Verizon to unlock my SIM? (I thought they came unlocked already)

I keep reading about sim lock, regional lock, updating APNs, data working but not voice, voice working but not data, etc. Would love to hear people's experiences if available

I'm guessing it isn't as simple as swapping out my VZW SIM for a local sim I purchase in Japan. Or is it?

Thanks in advance everyone!