In reality, Tatsuo has everything written down. The details he can pick out from his past-self's life, what he thinks the possible stimuli for the memory was, connections to other memories... He has it all written down, from all of the memories, not just the ones Togusa helped surface. But he's feeling uncharacteristically petulant right now.

Togusa probably has caused more memories than any other person in Tatsuo's life, as a simple fact. But it's not actually something he's upset about.

"No, I don't regret it. I want to know what happened, the truth. What I'm saying is that we can't avoid it, none of us. Not you, not me, not Mariko, no matter how much we might want to. And yet here you are, hiding it from her. Hiding the truth."