Why do Japanese developers take so long to make a single game?

[torok]

Ruler said:

because those have two teams working on it all the time. Fromsoftware, platinum games, koei and many other japanese studios are pumping the games quite fast and keep good standards

Actually last year Activision added an extra team, so they have 3 developers on CoD and each one has 3 years to release the game now.

Japanese developers usually have less staff. It's not hard to pump CoD once a year when they have around 600 to 1000 people working on the games full time.