Nice guesthouse in a quiet neighborhood with a few rooms. I stayed alone for two month, no problem. Has everything you need, even for cooking. I slept very well. The Metro is also closed by and Ueno Park. Be sure to check out Toyama Bakery on your way to Ueno Park. I would not recommend 4 people for the room I stayed in (there are bigger ones, I think), but 2 "regular sized" adults is perfectly fine. But that's on you, I guests 😉