Koichi was a great host. Very friendly, responsive, and attentive. The place was very clean and came with clean towels, linens, etc.
There is no toilet inside the unit, though the shared toilets are in the hallway right in front of the unit. These toilets were always clean, though didn't smell great, and did not have toilet paper in them reliably. Thankfully, Koichi provides toilet paper that you can take with you. The shower in the unit was not amazing... the shower head points straight at your forehead and there's no way to move it down. It was, however, well stocked with products.
If you're staying up in the loft of the unit, the ladder to get up there can be hard on the bottom of your feet, so keep that in mind!