From Surgipelago, the Beach Surgery encyclopedia
bastardised samurai sword
This article is about the weapon in the novel and adaptations. For Katita herself, see Katita (character).
The bastardised samurai sword is Katita's primary weapon across the novel and its adaptations. Its defining quality is paradoxical: described as "as sharp as chalk dust" — not blunt, but insufficiently sharp — it represents a tool inadequate to its task. Katita uses it to perform surgery ("you cannot do surgery without a sword"), yet surgery with chalk dust is figural, impossible, or oblique.
The sword's hybridism mirrors Katita herself: neither pure assassin nor nurse, neither Eastern nor Western. In the novel she uses it to cut the mechanical seagull free; in Pugil (the collected Pastoral Scanlines version), it becomes an instrument of ritual. Manga and anime adaptations often render it with red solder-marks or blood-dusting, emphasizing its jury-rigged nature.
Thematically, the bastardised sword embodies the central problem of the glitch: the seam does not compute because the available tools are insufficient. Katita wields what she has. Multiple works explore this fault: if the sword were truly sharp, could the cycle end? Or does its inadequacy ensure the loop continues? [citation needed]