Wow, what an incredible listing!
The listing is modern, high-tech, and has all of the amenities you would need. It's also enormous compared with other listings in Tokyo, and its location is amazing. It's tucked away on a quiet block, one street away from the main strip of Kagurazawa (where all the shops & dining are located), and a 4-5 minute walk to Iidabashi Station.
You're a short ride away from Shibuya, Shinjuku, Ikebukuro, and Ginza -- this was our first time in Japan and we were surprised at the listing's central location.
Masaharu-san was extremely responsive and regularly checked in on us to see if we needed anything. We would love to stay at his place again the next time we're in Tokyo!