Kasas place is definitely cozy and clean. For two people it was fine(even with large suitcases), but once you open the couch and small futon, there’s not much room for anything else. The apartment is truly 1 min away from the train station which is super convenient and the main way to get to any other part of Tokyo. We found a few great places within walking distance(Bassanova for ramen, Ushitora for beer/small plates, Gastropub Gozo for dinner and drinks.) Although you can hear the train, it truly wasn’t bothersome, but, I also live in a loud busy city at home. All in all this is a great place for two people who don’t mind being in close quarters or will just be crashing at night after sightseeing and exploring Tokyo. P.S. Kasa was extremely quick to respond to a couple of minor questions and really helpful which was greatly appreciated.