I cannot say enough good things about this little studio apartment. The last time that me and my fiancee stayed in Tokyo we found an amazing apartment in Minato-ku that we thought couldn't be beat, but when we checked to see if it was available for the trip we just completed the listing was completely gone! I suspect it had been removed from AirBnB due to Japan's stringent new rules about homestays and hotels, which, unfortunately, has made it a little more difficult to find places to stay for reasonable prices in Japan. We stumbled across this adorable little gem and I'm happy that we did!
This "Bright Green Studio" is a very fashionable, updated space that provides more room than the standard apartment or hotel room that you could get for this price in Tokyo would usually be able to offer. It's in a quiet neighborhood that's off to the side of Taito, and there are two or three train/subway stations within a walking distance of 10-15 minutes on average (a pretty typical, if not less than typical, walking distance for Japan). There are a TON of cute little cafes and great places to eat in the surrounding neighborhoods, and no lack of convenience stores within a short walking distance as well. The river is literally a block away, and the apartment is on the fourth floor of a building, so you end up with a decent view of the neighborhood.
The apartment itself is kept sparkling clean – and it still smells brand new! (I know that's a weird thing to notice, but it makes a difference) The bathroom situation is interesting, but it's actually a very nice setup once you get used to it, especially if you're sharing the apartment with other people. What's strange about it is that the toilet is technically "outside" of the main apartment – meaning it's between the elevator entrance and the proper entrance to the apartment – but it allows someone to be in the bathroom entirely separately from someone who is taking a shower or putting on makeup or something.
Very importantly, the hosts are incredibly responsive (almost the most responsive of any Airbnb I've ever stayed in, actually), and very helpful! They are willing to answer any questions you may have, and will try to get back to you as soon as they can. They also have a unique, streamlined check-in system for the entire building (I think they own all of the floors, so if you like this one and it isn't available, I think that some of their other properties are actually in the same building), which makes the annoyance of providing the necessary details that Japan requires you to offer to hotels you are staying in much less stressful to deal with.