Ichimaru san was very helpful and kind. Quick to respond when we had a question about the wifi. Thank you!
The apartment was very close to the Shinjuku subway line which was convenient for getting around Tokyo. It's a fine place to stay if you're just looking for a place to sleep for the night.
If you're sensitive to smell, I don't recommend staying here because there is a slight odor of smoke (although smoking is prohibited and this is very clearly marked in the apartment, which we appreciated! probably from a long time ago). The air was a bit damp due to the ventilation style of the apartment/building which is quite dated.
If you're staying with multiple people or for several nights, keep in mind the apartment is more of a studio than a 1 bedroom because of the window from the bedroom into the main room.