We spent the first leg of our several weeks trip in Japan at Masaharu's place, it was very chic and had a great location to hop right on the Yurakucho line and get anywhere in tokyo easily! While it doesn't have an elevator, the stairs were very easy to get suitcases up and down in. The trains are actually rather quiet and you don't hear them much unless you open the balcony door, but they make for great boomerangs on instagram haha. Our one piece of advice that might be useful for foreign guests not used to Japan is that you will want to turn on the hot water (panel above the bath) to have hot shower water. The shower's cold / hot knob only works when the heater is on, its not just for the bath water! Overall great stay and loved it for our first leg of our trip!