the apartement has a good size for 2 people, especially for tokyo. it is nice and clean and we found everything we needed.
at night it is quiet although it is located next to a lively street. the station koiwa is reachable within minutes and from there you can take a 20 minutes trainride to central tokyo.
there are a lot of bars and restaurants around so at night one might encounter some drunken people but i felt save all the time.
next time in tokyo i‘d love to stay in this apartement again.