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

Typical anime ti vi episodes broadcast on network Japanese ti vi 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 một giây opening puts thêm content between commercial breaks than a 30 hoặc 60 một giây opening, which may be less annoying for viewers to watch.