Insect Breathing is a Breathing Style that mimics insects, specifically their lethal stings and movements, and replicates it with user's movements, techniques and abilities. Most, if not all, known techniques and forms include stabbing, thrusting, and making shallow cuts with a specially coated/made sword to inflict multiple wounds onto the intended target in order to inject various lethal Wisteria-based poisons into them. Users of Insect Breathing also visualize themselves seemingly manifesting insects (mainly butterflies) when unleashing its techniques.
This Breathing Style is the personal creation of Shinobu Kocho, who designed it to compensate for her lack of physical strength to behead a demon. Hence, this sword style can only be utilized by her and only using a unique katana with a needle-like tip, resembling an insect's stinger in appearance and function. The "stinger" is designed for injection of Wisteria poisons into demons.