At this point, it is worth noting that I may or may not have planned my itinerary in Tokyo based on the locations in Digimon Cyber Sleuth. Well, Nakano Broadway isn't actually something that was in the original itinerary (since my memory of Cyber Sleuth is kind of foggy already), but I somehow recognised the architecture when I got there. In any case, that's one place checked off!
We had lots of time to kill, so we took our time looking around. The upper floors were like 90% Mandarake, trading card shops and gashapon shops. This was also when I found out there exists gashapon for used lingerie :GWnonSataniaSpoopy: