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

Typical Anime Televisione episodes broadcast on network Japanese Televisione 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 secondo opening puts più content between commercial breaks than a 30 o 60 secondo opening, which may be less annoying for viewers to watch.