In Ran (1985), after Lady Kaede slept with Lord Jiro, and as she was crying that it is she who should be Lord Jiro's wife, not Lady Sue, there is a scene where Lady Kaede has noticed an insect near her (a moth?), caught it, and seemingly killed it.
Does the insect represent Lady Sue? Or Lord Jiro? Or does this act or the insect have other symbolism? Is it a reference to Shakespeare's King Lear (which is the inspiration for Ran's plot) or to an aspect of Japanese culture?