I would strongly recommend Masami’s place.
It’s good value for money, considering how close it is to the centre of town (2 stops/5 mins from Shinjuku). It has lots of local amenities (Family Mart and 7 Eleven within three min walk), and is the perfect pied a terre for Tokyo as it is very simple but comfortable.
The place is perfect for one or two people (me and my brother are pretty big lads) and we had no trouble moving around the room.
Communication was excellent, the welcome pack had great directions, and instructions on how to use everything in the apartment.
My favourite touches were: It was nice and clean, comes with a mobile WiFi hotspot which saves you renting one or buying a sim, and has nice bathroom products which we used each day. The bed was comfy and the shower was very hot! The view from the balcony out the fifth floor fire escape is insane.
Thanks Masami, I will be back! X