Communication was responsive. Like other reviews have stated and as the listing itself describes, the place is very small. There is a single futon in the loft area and one on the floor of the apartment. My wife and I managed to squeeze together into the loft (but it was tight) so that we could use the floor space for our luggage. There are no chairs (or room for any) on the floor space so it was tough to maneuver when we were both getting ready to get out in the morning. As the listing says, there is no fridge. So, although there is a stove, unless you buy your provisions and cook them immediately, cooking is not convenient. There is a microwave if you need to heat up something from the conbini.
There was a problem with the check-in system where the iPad installed inside the front door was not connected to the internet and was therefore unusable. Fortunately we had data roaming so I was able to send a message to the host to be able to check in. However, had we not had a data connection it would have been extremely inconvenient.
I would say that this apartment is ideal for a single traveler who basically needs a place to crash and will be eating out for every meal. It’s more like a secure, private capsule room with your own bathroom and shower. The Wi-Fi in the apartment was fast and great. The location was convenient, a short walk from the JR Okubo station. Lots of convenience stores and restaurants nearby.