This is a really interesting spot. In a quieter part of Shinjuku, 1 block from the train. Traditional Japanese interior.
The apartment has a lot of idiosyncrasies which are not negative but take some learning. We were there 3 nights. I think it would have taken a couple more to learn all the systems (heaters, hot water, etc). It’s worth it to read the instructions very carefully. There are a lot of them but they do apply.
Host was awesome. Terrific communicator.