Why most Japanese Anime openings and endings are 90 Sekunden while English Anime openings are usually 30 oder 60 seconds? How can companies do that?

Typical Anime Fernsehen episodes broadcast on network Japanese Fernsehen 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 Sekunde opening puts Mehr content between commercial breaks than a 30 oder 60 Sekunde opening, which may be less annoying for viewers to watch.