Katsumoto himself has obtained a part of evidence of secret letter that contains a cheap trick made to signatures, and using it as a trigger, he grills Danjo briskly and leads the Gekizaemon's side to victory.
自ら証拠の密書の断片を手に入れていた勝元は、署名に施した小細工をきっかけにさわやかな弁舌で弾正を追及し、外記方を勝利に導く。