Naoki was a fantastic host.
I'd not visited Japan before, and was nervous about finding my way from the airport, but was pleasantly surprised to find that the day before my check-in Naoki sent me a thorough visual guide on how to reach her apartment from the nearest station, including step by step pictures on which exits to take and streets to walk down. Even a map!
All communication was prompt and easy. The apartment is exactly as it appears in pictures, and spotlessly clean. Perfect for a single person, or a very cozy couple. Location was good, but not excellent; it's the only thing that doesn't merit 5 stars. Having said that, there is everything you could need nearby and the area felt safe.
It's worth mentioning that although there is a kitchen, it's very basic. Think one pan, a few utensils, and a single small plate. It's really not an issue though, since you can eat very well at any of the many restaurants quite cheaply.
Excellent listing. Would recommend highly, and would stay again without hesitation.