Got a bit lost finding the place at first but if you go by finding his dojo, it would just be beside it. Nice and cosy apartment with everything you would need! It's near the fabric/textile town if you go to/from Nippori (15min walk and there's a standing ramen bar somewhere around too! Hisao-san is very friendly and nice! His wife makes really delicious sandwiches every morning and puts it in a bag which she hangs at the knob of your door (outside). Don't make a mistake like me by not realizing it was behind because I didn't step outside! :]
When I checked out, Hisao-San even offered to send me to the station despite being busy with work. Thank you Hisao-san!