This place was amazing!!! Koichi’s apartment is super stylish and comfy. It is fully equipped with everything you need, even if you prefer to cook rather than eat out. It also has everything for doing laundry which was very convenient. There is even a clothes drying vent in the bathroom for when you need your clothes dried quick. On top of that, the apartment is very secure, with only 10-ish apartments in the building and an auto-lock door.
The building is located in a quiet residential area nestled in the middle of a big city, with Shinjuku Chuo Park nearby. The Nishi-shinjuku 5-chome subway station was only about 2 minute walk away. There is a hokora (mini shrine?/altar) for the Koshin-san deity nearby, and also narrow streets lined with barber shops, a butcher, and a vegetable store. There is also a small walking/biking trail.
I live in Hokkaido so staying in Tokyo was a very different environment for me. Walking around the neighborhood made me feel like I was in the “real” Japan! I loved it so much.