Here's a teepee style post.
Akiba and nerd out. Figurines. Doujinishi.
^
I'm kidding about this Akiba actually scares the **** out of me.
Keyboards of course well duh.
If you're going with people, get a bokken and carry it around so you can embarrass everybody you're with.
Red light district

Electronics are cool.
Don't forget to visit a headphone/high fi shop.
Get an artisan mousepad if you like those.
Also Ramen but duh.
There's more but I gotta cut this short and go.