The fourth battle of Wakayama Castle is between Ichinotani Tenma and Anayama Kosuke.  Anayama says "Justice" a lot.  He attacks Tenma with his warped sense of justice.  A badly wounded Tenma continues to fight, hoping for just one thing: to meet the father and mother he's never seen.
And I realized you,
Y me di cuenta de algo: aquel que confía 
en sus amigos, sus familiares y su familia
Y me he dado cuenta de algo: debo 
instruir en la verdadera "Justice"
E eu percebi que você,