Kaishakunin Share definition Flag Samurai Who Performs Kaishaku During Seppuku. The Kaishakunin Used A Katana Known As A Dotanuki. "As The Shogun's Official Kaishakunin, Ogami-Ito Has Decapitated Countless Men." Kaishakunin by Ibble March 9, 2005 0 0 Get merch Get the Kaishakunin mug. Buy Now — $32.95 See more merch