Complex sentence: Masaki Saisho, who played Kayako in'and', is not appearing in the film either, making Runa Endo the fourth actress to play Kayako (counting Aiko Horiuchi who starred in "The Grudge 3").
Split into simpler sentences: Masaki Saisho, who played Kayako in'and', does not appear in the film either. This makes Runa Endo the fourth actress to play Kayako (counting Aiko Horiuchi, who starred in "The Grudge 3").