I had a great time in Kayo's apartment. The place is very accesible to
Higashi Shinjuku Station (Fukutoshin Line), just 4 minutes by walk and JR Shin-Okubo Station, 10 minutes away by walk.
The apartment's elevator is on 2nd floor. It was hard to use stairs to access elevator when we had heavy carrier.
I can easily contact with Kayo by e-mail and messenger when i had a question :) The apartment is clean,cozy,and bigger than i expected.