The place is neat. The neighborhood is very residential, quiet, and very safe to walk around late at night. Lawson is your neighbor so you dont have to worry about getting something late at night. The Shinagawa area is a perfect balance for the busy areas like Shibuya etc. The Osaki Station is a good 10 to 20-minute walk from the place (depends on how fast you walk). Think of it as exercise haha MY TIP: always take the South Exit from the Osaki Station going back to the place. :) The Osaki Station has the JR Yamanote -green- line which basically can take you anywhere in Tokyo! Main JR stations, Tokyo Metro, etc.
As for the host, Sayoko-さん is very reliable! She’s like a Mom who’s always ready to help :) She also suggested and drove me to Daikanyama :)
I love Tokyo! <3