staying in yokohama sept 5-11. asking for some suggestion on what to do.

Hi everyone I am traveling to japan on above dates and staying in yokohama for those nights. I dont have a itinerary planned out or anything. Mainly just walking around tokyo, food, shopping, arcades, and maybe some adult activities here and there. What are some other things to suggest or areas to check out.

Edit: Will be traveling solo and don't drink alcohol either