J-land

Slang for Japan. Most commonly used by non-Japanese people who have spent time living and working there.

I enjoy taking trains in J-land because they're convenient and clean, unlike public transportation back home.

T-ville

Slang for Tokyo, the capitol of Japan. See J-land. Most commonly used by non-Japanese 'gaijin' people who have spent time living and working there.

It's easy to spend money in T-ville shopping in Shibuya, Harajuku, and Shimokita.