Why most Japanese 아니메 openings and endings are 90 초 while English 아니메 openings are usually 30 또는 60 seconds? How can companies do that?

Typical 아니메 텔레비전 episodes broadcast on network Japanese 텔레비전 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 초 opening puts 더 많이 content between commercial breaks than a 30 또는 60 초 opening, which may be less annoying for viewers to watch.