The house is a 5 minute walk from the train station, and only 2 stops away from Ikebukuro. There are plenty of places to have a bite to eat nearby, as well as a couple of conbinis, so you'll be well covered even if on a certain day you don't feel like travelling around too much.
Hiroya's house is clean and well organised. He has quite a few signs placed around the house to make things easier (such as how to operate the thermostat for the shower, or hoy to properly separate your rubbish, etc).
One word of notice, though:
It IS a fairly standard Japanese house, so if you are over 175cm in height, just be careful not to bump your head on the doorframes.
Great stay! Definitely would recommend. :)