The listings from Aki and his team have become some of my favorite places to stay in Tokyo. After my first reservation with them I rebooked my other reservations so that I could stay in their apartments.
Communication with them was incredibly easy and quick. Most of the times you won't even need to contact them because everything in the apartment is conveniently labeled and explained in the house manual (a huge plus for anyone who doesn't read Japanese).
The apartment was spacious, sparkling clean, and really well equipped. Tsukiji is a great location, and there's a metro line a few minutes away that connects to Shibuya and other must visit places in Tokyo.
This listing is the standard I wish other hosts would follow! I totally recommend staying here.