Questions about NJPW

I do not watch it ouside of a few matches I hear about here like

Omega-Okada and Naito-Tana and Tana-Okada etc...

1. It is obvious from what everyone here says that NJPW has multiple supstars that can put on 5 star matches (Omega. Naito, Okada, Tana, Goto, etc...), What makes Japan wrestlers better? Is it their training? Is it because they have higher expectations over there?

2. How often does NJPW run shows outside of live events? Do they have a weekly tv show?

3. Why are there so many tag matches?

4. In your opinion, is the G1 the greatest thing in terms of in ring skills today?