Hisao's place is a great place to stay if you are looking for an affordable place to stay in Tokyo with it's own bathroom. It is also quite roomy compared to other rooms/apartments you might find elsewhere. There are 2 subway stations which are about a 10-minute walk away. Both subway stations (Uguisudani Station, Nippori Station) connect to the Yamanote Line. Also, if you are going to Narita International Airport, you can go straight there without needing to transfer trains when you take the Keisei Line at Nippori Station.
If you are walking to Hisao's place from Uguisudani Station, you will pass by several convenience stores (FamilyMart, Lawson, 7/11) and other places where you can buy cheap food.
Hisao was also an excellent host, very kind and hospitable. When it was time for us to leave, he offered us a ride to the subway station. It was raining that day, so a ride to the subway station was extremely helpful! He even gave us a Tokyo souvenir -- so thoughtful!
Every morning, his wife would prepare sandwiches for us and even gave some packed sweets. The sandwiches were absolutely delicious!
Thank you Hisao and to your wife!