It's easy to find following as PDF guide. It takes about 5 minutes from railway station to house. Hatagaya station is very convenient to center especially 新宿, just two stations. There are lots of restaurants, coffee bar, and two CVS, one small supermarket, and few drugstores on the way to house. The bathroom is tiny but clean. It's more suitable for single traveler or tow girls.
Last but not least, Mitsuko is very nice. Thank you for everything. I will choose here next time.