Koichi is a wonderful host. He is extremely considerate and on top of taking care of your needs.
The apartment has everything you could need. Excellent wifi, a large TV, washing machine and all you need to prepare a meal.
The apartment looks like it was completely redone and feels like you are in a brand new apartment that is sparkling clean and everything is new.
It is only a 10 minute walk to Shinjuku Station.
I highly recommend staying here.