I've stayed at Sayoko's place with my girlfriend for 2 nights. The place is not too big, but it's really neat n' clean, got everything you need. Both me and my girlfriend felt comfortable just like home while staying there. It takes around 10 mins walk from Osaki station to the place, pretty convinient. And there's a Lawson really nearby. Most of all, Sayoko is a really polite n' warm person. She helped me a lot with my schedule traveling Tokyo. It's really a fortune and awesome experience to have stayed at her place while traveling to Tokyo!