There is a story that he was so enraged during seppuku (suicide by disembowelment) that he flung his entrails away; however, not only has this been proven impossible from a medical standpoint, but also due to the manner of Kaishaku (to assist someone in committing hara-kiri by beheading him), his head must have been cut off the moment the sword entered his abdomen, so the story is fictitious, and it is likely that the death haiku or rakushu (satire) was made up along with it.
切腹の際に怒りのあまり臓物をなげつけたという説もあるが、医学的検証からそのようなことは不可能であること、腹に刀をいれたとたん介錯するという作法があることから、そういった逸話とともに創作された辞世の句か落首の類とも考えられる。