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

Typical anime televisi episodes broadcast on network Japanese televisi 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 detik opening puts lebih content between commercial breaks than a 30 atau 60 detik opening, which may be less annoying for viewers to watch.