Great place as a base to explore Tokyo. 4 min by JR to Shinjuku, 25 to Tokyo (+4 min. from apartment to train station) and you can use JR pass for that commute! It’s a brand new tiny apartment for max 2-3 persons, in a quiet neighborhood. There are couple of reasonable restaurants around and a great western-style bar.
On a downside, very uncomfortable mattresses. Also, as above, comfortable for 2 persons. 3 is a small crowd.