Me neither, but I've done HND-PEK-HND now, and stayed both nights in the Villa Fontaine Grand Haneda Airport, which was excellent. Took a bicycle ride in the airport vicinity after downloading the "Hello Cycling" app.
More interestingly, I forgot my US Cell Phone in the room on the way to China...called the hotel up a few days later; they had found it and promised to keep it for me until my return trip...sure enough, they handed to me on my return!