Katsu san's place is very accessible around 10-15mins walk from asakusa stn or sensoji temple. Lots of covenience stores, laundry shops, vending machines, local restaurants in the area.
Katsu san is very warm and hospitable. He made sure that our room and the toilet was clean. Very flexible about check-in and check-out time. I highly recommend Katsu-san's place to get a taste living in a japanese neighborhood.