This apartment is a great place to stay if you're looking for some place conveniently located and are wanting/willing to stay in a traditional Japanese-style house. We were a family of 6 and four slept on futons/tatami mats upstairs, with 2 downstairs on futons/tatami mats. The building is old and small, but it has a lot of traditional Japanese character. It's just a few minutes from the Uguisudani train station, which is a small station on the major Yamanote Loop station (one stop from Ueno Station, and a few stops from Akihabara and Tokyo Stations), which makes it a good home base for exploring Tokyo. There are several convenience stores nearby as well as restaurants. It's definitely a residential neighborhood, which is nice if you prefer not to stay in hotels filled with tourists. (Please be respectful of the neighbors.) It's a little grittier than some of the fancier Tokyo neighborhoods, but it's still 100% safe to wander at night, as is expected in Japan.
Kota was an excellent host. He met us on the first day and checked us in, gathering all the official documentation and filling out the necessary forms. This was reassuring, as there is always some question about legitimate listings in Japan. During our trip, we needed to have a package sent with contact lenses for my daughter, and Kota accepted and paid for the package (which we reimbursed him for via Airbnb), and delivered it to the apartment. This was extremely helpful. He went above and beyond for us.