It was such an enjoyable experience what my family and I have ever had. Surprisingly, I made my mom and aunt changed their "traditional" thought on BnB. (Thank you, Bryan) Now, they would rather be staying in a BnB than a hotel room.
The apartment is really tidy, clean, and cozy, that is the most important thing my family was concerned about. The environment around is really convenient so that we would not be worried about being hungry during mid-nights. It's only 5-8 mins walking distance to subway station, it was a nice exercise for elder people like my dad and aunt. (67 & 73) The most remarkable thing is they provide walking wifi device which made our trip easier to go everywhere. (If you were like me as a heavy internet user, do not miss this option when you look up the BnBs.) My family and I would definitely come back to stay here again for next visit.
Again, thank Bryan and Nozomi's help. It was not an easy task to go on a trip with seniors. With their help and host, the satisfaction of our trip brings up to higher level. I will see you around next year and would highly recommend staying here to whom is going to Japan.