And why did you take the Giza-subway line. A true Otaku takes the Yamanote-Line :P
A TRUE otaku knows Akihabara is on the Hibya line, not the Ginza. Nearest Ginza station is Suehirocho.
Of course, the real otakus drive Evo VIIs covered in anime graphics and filled with plushies. Check out the UDX garage sometime if you're ever there and you'll see.