I had a comfortable and affordable week-long stay at Hotel Route Inn. The room has a kettle and a mini fridge for which I was grateful, since I have dietary restrictions and usually stock up on food myself rather than depending on hotel restaurants. It was a little more spacious than my hotel rooms in Tokyo at the same price range, but still pretty small. In general it was a very comfortable stay, with adequate electrical outlets for my needs and a non-smoking floor. I was able to check out as early as I needed to (5 AM) as there is staff at desk 24 hours a day. There are convenience stores nearby, but I'd recommend renting a bike (I rented one from Yamaha You) for getting around the city. My only complaint is that there is only one coin laundry machine (per men or women, since they're located in gender-separated public bathing areas) and you need to get a key for access to the room.