Flexstay Inn Sugamo 

It's a nice place, walking distance to the station. Sugamo station is great because it's on the Yamanote line so you can easily access anywhere in Tokyo. There's also the subway which gives more travel options. Jizo Dori shopping street is very close to the hotel, some good options for shopping and good restaurants around. Komeda coffee is also nearby, and a great place for breakfast. The staff was very friendly. You should know this is not a serviced hotel, so they will not make up the room. But they do change towels if you request. Wifi worked ok, shower pressure was good, the coin-operated laundry was handy. Cons: I don't know if all their rooms are smoking, but when I booked smoking was the only available. I don't smoke but I thought it would be ok, it was very smelly though. But then I asked the reception and they gave me some anti-odour spray and it solved the problem.