Had a hard time finding the house. For future guests of Hisao-san, get off at JR Nippori Station. Then take any bus 08 to Shimo-Negishi Station (3rd bus stop from station). This bus stop is right in front of LAWSON convenience store. Once you get down, walk forward a bit until you reach the big intersection (a 3 way fork). Face right and cross the road you should see a grill restaurant). Then keep walking straight until you see a vending machine with a sticker of a person doing kendo. The house beside that is Hisao's House. Just go up the stairs on the right and ring the doorbell on the second floor.
Hisao-san is a very kind host. He helped us take our luggage to our room and tried to explain everything even with limited English. Every morning, he gave us breakfast sandwiches and sweets.
On our last day, we had to check out at 6:30 AM because our bullet train from Ueno was at 7:30. The night before, he told us to just leave the key in the mailbox. But on the morning of our departure, he came to our room and told us that he will drive us to Ueno Station! Very kind, indeed.
It's too bad we didn't get to meet Naomi-san (his wife) or get to try kendo due to our busy schedule. Next time! I will definitely stay at Hisao-san's place again!