Our family of 4 (2 adults, 2 kids) stayed in Koichi's apartment in June 2018, and we had an amazing stay. Koichi was a wonderful host. He provided us information by email ahead of time to find the apartment, met us there to explain things, and was always available by text if needed. The apartment was cozy, but comfortable and in a great neighborhood close to, but not too close to, the fun of Shinjuku. Air conditioning in the summer was a must and Koichi's A/C was perfect! The pocket wi-fi was very helpful, but if you are data hogs like my family, you may want to consider supplementing with another device. Koichi was very helpful at checkout, attempting to get us a taxi to Tokyo Station, and helping us down with our luggage. I would absolutely stay at Koichi's place again. Thank you Koichi!