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It's so nice to see Itto and Diagoro back together on their travels. Everything feels the way it should be. Itto pays a visit to his deceased wife's hometown to have someone he trusts to check the Yagyu letter and see if he can figure out it's secret. Unable to do so, he recommends another pert for Itto to take it to. Before leaving, Itto and Diagoro pray for their deceased wife/mom. Itto takes the letter to the man that was recommended and he figures out the secret, but they want Itto to do an assassination. For their help, Itto agrees and does the job, but the man he killed didn't agree with his philosophy, but I think Itto is a smart man and I agree with the philosophy he lives by.