Niko-san has provided a very good place to stay, the location is convenient to our family. The neighborhood is quiet, about 6-8 minutes walk, there is a big supermarket. Opposite the supermarket across the street is a bus stop with bus services 32, 33 and 35 that go to the Shinjuku West bus station in about 10 minutes.
Shinjuku West bus station is directly above the huge Shinjuku JR and train station, it is also next to various department stores like Odakyu, etc.
You can also walk from the house to the nearest train station in about 15 minutes, the station is Nishi Shinjuku Gochome, the Toei Odeo Line will take you to the Shinjuku JR and train station that is 2 stations away.
We have had a great time staying there!