Yoshihito’s place offers you a free portable wifi router which came in very useful! There is one communal shower room and one communal bathroom (toilet). Toilet paper and shower wash was always available. Inside each room was an air conditioner (both cold and hot air available). There was also face wash for you to use in the communal sink - this is located seperate to the shower and toilet.
There are around 5 rooms total on your floor but there is no communal/lounge area. It is not noisy at night however. The airbnb location is around 15 minutes walk to the closest station (Tokyo station).
Yoshihito allowed me to rest in a spare available room before check in since I arrived early to Japan at 2am!