And it just so happens that Akechi's plans have brought him to Shinjuku. If he's supposed to remember, then it will help to go to places he remembers, right? And he has oddly fond memories of living there.

Actually, of living not a thousand miles from where he's found the sign. "I AM BLOWING UP THIS AREA. GO AWAY." He doesn't, of course. Instead, he curls his finger to his chin, and considers it. Who's blowing things up? Why on earth? And how?

He ought to leave, of course. He'll get clear in just a moment. But it's just... so interesting.