Why most Japanese anime openings and endings are 90 seconden while English anime openings are usually 30 of 60 seconds? How can companies do that?

Typical anime televisie episodes broadcast on network Japanese televisie have commercial breaks after the opening animation, in the middle of the episode, and just before the ending credits. With this broadcast pattern, a 90 seconde opening puts meer content between commercial breaks than a 30 of 60 seconde opening, which may be less annoying for viewers to watch.