#4 Protecting Championships and Champions
Some may say that championships and champions do not hold the prestige as they once used to, like Bruno Sammartino or the NWA championship. While this may be true for WWE and TNA/Impact, it does not hold true for NJPW.
For instance, the IWGP Heavyweight Championship has been held by only four men (Hiroshi Tanahashi, Kazuchika Okada, AJ Styles and Tetsuya Naito) since Wrestle Kingdom 5, that's nearly 7 years!
While many champions elsewhere fall prey to 50-50 booking tactics (think about Sasha Banks and Charlotte's feud from last year) New Japan's champions, especially the 'higher' belts such as the heavyweight, intercontinental rarely change hands.
This goes for the champions as well; Okada is now the longest reigning IWGP heavyweight champion in history! Note the way he is booked, protected heavily, except for a few intentional and minor blemishes in the G1 Climax.