@nprofile1q..., if you make it to Osaka during your trip, there will be a lot more stuff around there. DenDen is a pretty solid place in Osaka. Kyoto is pretty dry when it comes to porn.
Also, there's another shop that's near the entrance of Akihabara station, if you take an immediate left when facing the main street instead of heading right like most do, that has another basement set up as well.